المؤلفون: Jacob Lage, Simon Orford, Elizabeth A Chapman, Simon Griffiths

المصدر: Journal of Experimental Botany

مصطلحات موضوعية: Senescence, senescence, Physiology, Quantitative Trait Loci, Mutant, exome capture, Plant Science, Biology, Bulk segregant analysis, wheat, mutant, Allele, Gene, Alleles, Triticum, Genetic association, Genetics, AcademicSubjects/SCI01210, food and beverages, Research Papers, Phenotype, Forward genetics, forward genetics, staygreen, remobilization, Crop Molecular Genetics, NAM, grain fill, Edible Grain, Genetic screen

الوصف: Senescence is a complex trait under genetic and environmental control, in which resources are remobilized from vegetative tissue into grain. Delayed senescence, or ‘staygreen’ traits, can confer stress tolerance, with extended photosynthetic activity hypothetically sustaining grain filling. The genetics of senescence regulation are largely unknown, with senescence variation often correlated with phenological traits. Here, we confirm staygreen phenotypes of two Triticum aestivum cv. Paragon ethyl methane sulfonate mutants previously identified during a forward genetic screen and selected for their agronomic performance, similar phenology, and differential senescence phenotypes. Grain filling experiments confirmed a positive relationship between onset of senescence and grain fill duration, reporting an associated ~14% increase in final dry grain weight for one mutant (P
Two staygreen mutants were identified for which grain fill duration and grain weight were enhanced. Independent amino acid substitutions within NAC subdomain IV of NAM-1 homoeologues are proposed as causative.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::676a0fdb9e72c321e8bd1bcc7e2b8902Test
https://doi.org/10.1093/jxb/erab368Test

المؤلفون: Jean-Christophe Avice, Jeanne Cheneby, Nicolas Elie, Sophie Brunel-Muguet, Philippe Etienne, Mickael Lamboeuf, Yacine Akmouche, Jacques Trouverie, Philippe D’Hooghe, Anne Laperche, Jessica Bertheloot

المساهمون: Ecophysiologie Végétale, Agronomie et Nutritions (EVA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Recherche Agronomique (INRA), Agroécologie [Dijon], Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté [COMUE] (UBFC), AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut de Recherche en Horticulture et Semences (IRHS), AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA)-Université d'Angers (UA), Pari Scientifique Département Environnement et Agronomie, Institut National de la Recherche Agronomique, Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Université d'Angers (UA)-Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA), Ecophysiologie Végétale, Agronomie et Nutritions NCS (EVA), Normandie Université (NU)-Normandie Université (NU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université de Bourgogne (UB)-Institut National de la Recherche Agronomique (INRA)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Université de Rennes 1 (UR1), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)

المصدر: Planta
Planta, Springer Verlag, 2019, 250 (6), pp.2047-2062. ⟨10.1007/s00425-019-03284-2⟩
Planta, 2019, 250 (6), pp.2047-2062. ⟨10.1007/s00425-019-03284-2⟩

مصطلحات موضوعية: 0106 biological sciences, 0301 basic medicine, Genotype, Nitrogen, Ribulose-Bisphosphate Carboxylase, Brassica, chemistry.chemical_element, Context (language use), Flowers, Plant Science, Biology, Photosynthesis, 01 natural sciences, Remobilization, Crop, 03 medical and health sciences, Human fertilization, Sulphur, [SDV.SA.STA]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of agriculture, Genetics, Indicators, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, ComputingMilieux_MISCELLANEOUS, Plant Proteins, 2. Zero hunger, Sulfates, Brassica napus, fungi, RuBisCO, food and beverages, Limiting, biology.organism_classification, Sulfur, Crop Production, Plant Leaves, 030104 developmental biology, Agronomy, chemistry, Fertilization, Seeds, Oilseed rape, 010606 plant biology & botany

الوصف: International audience; Specific combinations of physiological and molecular parameters associated with N and S remobilization measured at the onset of flowering were predictive of final crop performances in oilseed rape. Oilseed rape (Brassica napus L.) is a high nitrogen (N) and sulphur (S) demanding crop. Nitrogen- and S-remobilization processes allow N and S requirements to reproductive organs to be satisfied when natural uptake is reduced, thus ensuring high yield and seed quality. The quantification of physiological and molecular indicators of early N and S remobilization could be used as management tools to correct N and S fertilization. However, the major limit of this corrective strategy is to ensure the correlation between final performances-related variables and early measured parameters. In our study, four genotypes of winter oilseed rape (OSR) were grown until seed maturity under four nutritional modalities combining high and/or low N and S supplies. Plant final performances, i.e., seed production, N- and S-harvest indexes, seed N and S use efficiencies, and early parameters related to N- or S-remobilization processes, i.e., photosynthetic leaf area, N and S leaf concentrations, leaf soluble protein and leaf sulphate concentrations, and leaf RuBisCO abundance at flowering, were measured. We demonstrated that contrasting final performances existed according to the N and S supplies. An optimal N:S ratio supply could explain the treatment-specific crop performances, thus justifying N and S concurrent managements. Specific combinations of early measured plant parameters could be used to predict final performances irrespective of the nutritional supply and the genotype. This work demonstrates the potential of physiological and molecular indicators measured at flowering to reflect the functioning of N- and S-compound remobilization and to predict yield and quality penalties. However, because the predictive models are N and S independent, instant N and S leaf analyses are required to further adjust the adequate fertilization. This study is a proof of a concept which opens prospects regarding instant diagnostic tools in the context of N and S mineral fertilization management.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ee3dc84afae7db5fd2b606a3340d8c1Test
https://hal-agrocampus-ouest.archives-ouvertes.fr/hal-02353498Test

المؤلفون: Cintia G. Veliz, Ana Signorini, Carla Caputo, Ester Simonetti, Irma N. Roberts, Maria Victoria Criado

المصدر: Journal of Plant Physiology. 211:70-80

مصطلحات موضوعية: Chlorophyll, 0106 biological sciences, 0301 basic medicine, Senescence, Physiology, Ribulose-Bisphosphate Carboxylase, Plant Science, Protein degradation, Genes, Plant, Real-Time Polymerase Chain Reaction, 01 natural sciences, Subtilase, Ciencias Biológicas, 03 medical and health sciences, Gene Expression Regulation, Plant, Databases, Genetic, Gene expression, BARLEY (HORDEUM VULGARE L.), Amino Acid Sequence, Subtilisins, PROTEOLYSIS, Gene, Ciencias de las Plantas, Botánica, Plant Proteins, Plant senescence, Serine protease, Genetics, biology, Reproduction, Gene Expression Regulation, Developmental, food and beverages, Plant physiology, Hordeum, Darkness, NITROGEN REMOBILIZATION, Plant Leaves, PROTEASES, 030104 developmental biology, Biochemistry, SENESCENCE, biology.protein, SUBTILASES, Sequence Alignment, Agronomy and Crop Science, CIENCIAS NATURALES Y EXACTAS, 010606 plant biology & botany

الوصف: Subtilases are one of the largest groups of the serine protease family and are involved in many aspects of plant development including senescence. In wheat, previous reports demonstrate an active participation of two senescence-induced subtilases, denominated P1 and P2, in nitrogen remobilization during whole plant senescence. The aim of the present study was to examine the participation of subtilases in senescence-associated proteolysis of barley leaves while comparing different senescence types. With this purpose, subtilase enzymatic activity, immunodetection with a heterologous antiserum and gene expression of 11 subtilase sequences identified in barley databases by homology to P1 were analyzed in barley leaves undergoing dark-induced or natural senescence at the vegetative or reproductive growth phase. Results showed that subtilase specific activity as well as two inmunoreactive bands representing putative subtilases increased in barley leaves submitted to natural and dark-induced senescence. Gene expression analysis showed that two of the eleven subtilase genes analyzed, HvSBT3 and HvSBT6, were up-regulated in all the senescence conditions tested while HvSBT2 was expressed and up-regulated only during dark-induced senescence. On the other hand, HvSBT1, HvSBT4 and HvSBT7 were down-regulated during senescence and two other subtilase genes (HvSBT10 and HvSBT11) showed no significant changes. The remaining subtilase genes were not detected. Results demonstrate an active participation of subtilases in protein degradation during dark-induced and natural leaf senescence of barley plants both at the vegetative and reproductive stage, and, based on their expression profile, postulate HvSBT3 and HvSBT6 as key components of senescence-associated proteolysis. Fil: Roberts, Irma. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales; Argentina Fil: Veliz, Cintia Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales; Argentina Fil: Criado, Maria Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales; Argentina Fil: Signorini, Ana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales; Argentina Fil: Simonetti, Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales; Argentina Fil: Caputo Suarez, Carla Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales; Argentina

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cc0d0f3c0df4919cfef964e7289de44Test
https://doi.org/10.1016/j.jplph.2017.01.005Test

المؤلفون: A. G. Khakimova, O. P. Mitrofanova

المصدر: Vavilovskij Žurnal Genetiki i Selekcii, Vol 20, Iss 4, Pp 545-554 (2016)

مصطلحات موضوعية: medicine.medical_specialty, grain protein content, senescence, aegilops, molecular markers, Locus (genetics), 010501 environmental sciences, Biology, QH426-470, 01 natural sciences, Genome, General Biochemistry, Genetics and Molecular Biology, gpc-genes, Molecular genetics, 0502 economics and business, Botany, medicine, Genetics, Allele, nac transcription factor, Gene, 0105 earth and related environmental sciences, triticum, 05 social sciences, Chromosome, food and beverages, biology.organism_classification, genetic resources, remobilization, breeding, Aegilops, 050211 marketing, Ploidy, General Agricultural and Biological Sciences

الوصف: The present review offers an overview of genetic research on grain protein content (GPC) in various Triticum L. and Aegilops L. species. Regularities in geographic variability of GPC and the results of a longterm screening of accessions from the VIR collection for this trait are considered. On the basis of these assessments, a core-collection of genetic sources with high GPC has been formed. It includes the diploid Aegilops species as donors of B, G and D genomes for allopolyploid wheats, as well as accessions of di-, tetra- and hexaploid wheat species. The use of highprotein sources in wheat breeding in the United States and Canada in the 1970’s–1980’s resulted in the bread wheat GPC increase by 0.5–3.0 %; however, further purposeful attempts at increasing GPC by traditional breeding methods failed. A breakthrough in increasing the total GPC has been achieved as a result of molecular genetics methods and molecular markers development. For the first time, a functional locus, or the Gpc-B1 gene (chromosome 6BS) affecting the accumulation of protein, Zn and Fe in grain, was identified in T. dicoccoides, cloned and studied in detail. The application of molecular markers has revealed the active allele of this gene in some landraces and old cul-tivars of T. dicoccum, T. durum, T. spelta and T. aestivum. Moreover, Gpc-A1, Gpc-D1, and Gpc-2 wheat genes have been found in chromosomes 6A, 6D and homeologous group 2, respectively. All these genes have been identified as NAC transcription factors, which play an important role in the accelerated senescence of plants and remobilization of nutrients from leaves to grain. The genes related to Gpc-B1 from T. dicoccoides were found in the G genome of T. timopheevii and B (=S) genome of different species of Aegilops sect. sitopsis. Functional Gpc-B1 alleles have been introduced into commercial tetra- and hexaploid wheat cultivars, and it resulted in the creation of new highprotein and high-yield cultivars and series of nearly isogenic lines in different countries. They are promising sources for research and wheat breeding purposes.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c41ce107d3c9333bca85d04d0c2d2b8Test
https://vavilov.elpub.ru/jour/article/view/704Test

المؤلفون: Jasmin Doll, Lena Riester, Stefan Bieker, Ulrike Zentgraf, Andreas Fangmeier, Juergen Franzaring

المصدر: Genes, Vol 10, Iss 2, p 72 (2019)
Genes
Volume 10
Issue 2

مصطلحات موضوعية: 0106 biological sciences, 0301 basic medicine, Canopy, Senescence, Rapeseed, senescence, lcsh:QH426-470, Nitrogen, seed storage proteins, hydrogen peroxide, 01 natural sciences, Article, Transcriptome, 03 medical and health sciences, Nutrient, Gene Expression Regulation, Plant, Arabidopsis, Genetics, Storage protein, Genetics (clinical), chemistry.chemical_classification, biology, Nitrogen deficiency, Brassica rapa, nitrogen supply, oil seed rape, food and beverages, nitrogen remobilization, biology.organism_classification, Plant Leaves, Horticulture, lcsh:Genetics, 030104 developmental biology, chemistry, 010606 plant biology & botany

الوصف: In general, yield and fruit quality strongly rely on efficient nutrient remobilization during plant development and senescence. Transcriptome changes associated with senescence in spring oilseed rape grown under optimal nitrogen supply or mild nitrogen deficiency revealed differences in senescence and nutrient mobilization in old lower canopy leaves and younger higher canopy leaves [1]. Having a closer look at this transcriptome analyses, we identified the major classes of seed storage proteins (SSP) to be expressed in vegetative tissue, namely leaf and stem tissue. Expression of SSPs was not only dependent on the nitrogen supply but transcripts appeared to correlate with intracellular H2O2 contents, which functions as well-known signaling molecule in developmental senescence. The abundance of SSPs in leaf material transiently progressed from the oldest leaves to the youngest. Moreover, stems also exhibited short-term production of SSPs, which hints at an interim storage function. In order to decipher whether hydrogen peroxide also functions as a signaling molecule in nitrogen deficiency-induced senescence, we analyzed hydrogen peroxide contents after complete nitrogen depletion in oilseed rape and Arabidopsis plants. In both cases, hydrogen peroxide contents were lower in nitrogen deficient plants, indicating that at least parts of the developmental senescence program appear to be suppressed under nitrogen deficiency.

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f82e06416e8cde50d9bbb192155bfdeaTest
https://www.mdpi.com/2073-4425/10/2/72Test

المؤلفون: Jean-Christophe Avice, Renier A. L. van der Hoorn, Marine Poret, Balakumaran Chandrasekar

المساهمون: Ecophysiologie Végétale, Agronomie et Nutritions (EVA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), French National Research Agency [ANR-11-BTBR-004], French Ministry of Research, PhD Doctoral School (EDNBISE, Ecole Doctorale Normande Biologie Integrative, Sante, Environnement), ERA-IB project 'PRODuCE', Max Planck Society, COST [CM1004], University of Oxford

المصدر: Plant Science
Plant Science, Elsevier, 2016, 246, pp.139-153. ⟨10.1016/j.plantsci.2016.02.011⟩

مصطلحات موضوعية: 0106 biological sciences, 0301 basic medicine, Senescence, Proteasome Endopeptidase Complex, Proteases, Soluble proteins, Rapeseed, Ribulose-Bisphosphate Carboxylase, medicine.medical_treatment, Plant Science, Protein degradation, Biology, 01 natural sciences, Serine, 03 medical and health sciences, Tandem Mass Spectrometry, Genetics, medicine, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Protease activity, ComputingMilieux_MISCELLANEOUS, Plant Proteins, 2. Zero hunger, Cysteine proteases, Protease, Brassica napus, fungi, RuBisCO, food and beverages, General Medicine, Hydrogen-Ion Concentration, Senescence-associated proteases, Up-Regulation, Plant Leaves, 030104 developmental biology, Solubility, Proteasome, Biochemistry, Proteolysis, Seeds, Vacuoles, biology.protein, Nitrogen remobilization efficiency, Seasons, Agronomy and Crop Science, Chromatography, Liquid, Peptide Hydrolases, 010606 plant biology & botany

الوصف: International audience; Oilseed rape (Brassica napus L.) is a crop plant characterized by a poor nitrogen (N) use efficiency that is mainly due to low N remobilization efficiency during the sequential leaf senescence of the vegetative stage. As a high leaf N remobilization efficiency was strongly linked to a high remobilization of proteins during leaf senescence of rapeseed, our objective was to identify senescence-associated protease activities implicated in the protein degradation. To reach this goal, leaf senescence processes and protease activities were investigated in a mature leaf becoming senescent in plants subjected to ample or low nitrate supply. The characterization of protease activities was performed by using in vitro analysis of RuBisCO degradation with or without inhibitors of specific protease classes followed by a protease activity profiling using activity-dependent probes. As expected, the mature leaf became senescent regardless of the nitrate treatment, and nitrate limitation enhanced the senescence processes associated with an enhanced degradation of soluble proteins. The characterization of protease activities revealed that: (i) aspartic proteases and the proteasome were active during senescence regardless of nitrate supply, and (ii) the activities of serine proteases and particularly cysteine proteases (Papain-like Cys proteases and vacuolar processing enzymes) increased when protein remobilization associated with senescence was accelerated by nitrate limitation. Short statement: Serine and particularly cysteine proteases (both PLCPs and VPEs) seem to play a crucial role in the efficient protein remobilization when leaf senescence of oilseed rape was accelerated by nitrate limitation.

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37e669c817ae4468b032582c274323edTest
https://doi.org/10.1016/j.plantsci.2016.02.011Test

المؤلفون: Reza Amiri, Ezatollah Farshadfar

المصدر: Genetika, Vol 48, Iss 1, Pp 139-149 (2016)

مصطلحات موضوعية: co-heritability, 0106 biological sciences, genetic gain, Genetic diversity, lcsh:QH426-470, Peduncle (anatomy), food and beverages, drought, Plant Science, heritability, Biology, Heritability, Photosynthesis, 010603 evolutionary biology, 01 natural sciences, remobilization, lcsh:Genetics, Agronomy, Genetic gain, Genetics, Dry matter, Genetic variability, 010606 plant biology & botany, Plant stem

الوصف: In order to evaluate genetic variability and estimation of remobilization related traits in wheat using biometrical genetic techniques an experiment was conducted in a randomized complete blocks design with three replicates under post-anthesis drought stress conditions in the Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran during 2011-2012 cropping season. The results of analysis of variance showed significant differences between the genotypes for all studied traits except current photosynthesis (CP) and current photosynthesis share into kernel yield (CPSKY). High genetic gain and broad sense heritability estimates were observed for penultimate remobilization share into kernel yield (PenRSKY) and internodes remobilization share into kernel yield (IRSKY) indicating high genetic potential, low effect of environment and predominant role of additive gene effect on their expression. Spike dry matter remobilization (SDMR), spike dry matter remobilization efficiency (SDMRE) and spike remobilization share into kernel yield (SRSKY) exhibited the highest phenotypic and genetic positive correlation with kernel yield (KY). Moreover, the highest genotypic and phenotypic covariance was observed between kernel yield (KY) and SDMR, CP, SDMRE and SRSKY, respectively. The highest environmental covariance was identified between kernel yield (KY), peduncle dry matter remobilization (PedDMR) and penultimate dry matter remobilization (PenDMR), respectively. High co-heritability was detected between SDMRE and PedDMR, PedDMRE and PenDMR and between peduncle remobilization share into kernel yield (PedRSKY) and internodes dry matter remobilization efficiency (IDMRE), suggesting that selection of either of the traits would simultaneously affect the others, positively.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32339b5b59ebc32d365e3357dedc47b1Test
https://doi.org/10.2298/gensr1601139fTest

المؤلفون: Ivana Maksimović, Vojislava Momčilović, Milan Mirosavljević, Novo Przulj, Nikola Hristov

المصدر: Genetika, Vol 47, Iss 2, Pp 751-763 (2015)
Genetika-Belgrade

مصطلحات موضوعية: 0106 biological sciences, lcsh:QH426-470, animal diseases, sowing date, Plant Science, Biology, 01 natural sciences, Barley (Hordeum vulgare L.), Yield (wine), Genetics, Dry matter, Cultivar, Crop management, 2. Zero hunger, Sowing, food and beverages, 04 agricultural and veterinary sciences, 15. Life on land, Horticulture, remobilization, lcsh:Genetics, Agronomy, 040103 agronomy & agriculture, dry matter, 0401 agriculture, forestry, and fisheries, Grain yield, accumulation, 010606 plant biology & botany, cultivar

الوصف: Knowledge about the effect of genotypic variation and sowing date on dry matter accumulation, remobilization and partitioning in winter barley is important for crop management. Therefore, in field studies, six winter barley genotypes of various origin and maturity groups were studied across four sowing dates. In general, grain yield and dry matter content decreased with delayed sowing, after mid-October, and average grain yield in late October and November sowing was lower 14.2% and 16.9%, respectively, compared to the yield in the optimal sowing date. Among the tested genotypes, high grain yield and dry matter content was obtained from late and medium early barley genotypes. Delayed sowing dates, on average, reduced dry matter remobilization and contribution of vegetative dry matter to grain yield. In years characterized by high spring precipitation, late September and early October sowing of medium early and late barley genotypes enable increased accumulation and remobilization of dry matter and obtainment of high grain yield. [Projekat Ministarstva nauke Republike Srbije, br. TR-31066: Modern breeding of small grains for present and future needs]

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a78b181389c05fccefa163ab502b7cd0Test
http://www.doiserbia.nb.rs/img/doi/0534-0012/2015/0534-00121502751M.pdfTest

المؤلفون: Shawn R. Thatcher, Amnon Lers, Pamela J. Green, Christopher D Wright, Shaul Burd

المصدر: Plant, Cell & Environment

مصطلحات موضوعية: 0106 biological sciences, Senescence, Small RNA, Time Factors, senescence, Physiology, nutrient remobilization, Arabidopsis, Plant Science, Biology, 01 natural sciences, Deep sequencing, 03 medical and health sciences, Gene Expression Regulation, Plant, microRNA, RNA, Messenger, PARE, Gene, Cellular Senescence, A rabidopsis thaliana, Gene Library, 030304 developmental biology, Genetics, 0303 health sciences, Sequence Analysis, RNA, High-Throughput Nucleotide Sequencing, RNA, Original Articles, silique, biology.organism_classification, Cell biology, Plant Leaves, MicroRNAs, RNA, Plant, Cell aging, 010606 plant biology & botany

الوصف: MicroRNAs (miRNAs) are a class of small RNAs, which typically function by guiding cleavage of target mRNAs. They are known to play roles in a variety of plant processes including development, responses to environmental stresses and senescence. To identify senescence regulation of miRNAs in Arabidopsis thaliana, eight small RNA libraries were constructed and sequenced at four different stages of development and senescence from both leaves and siliques, resulting in more than 200 million genome-matched sequences. Parallel analysis of RNA ends libraries, which enable the large-scale examination of miRNA-guided cleavage products, were constructed and sequenced, resulting in over 750 million genome-matched sequences. These large datasets led to the identification a new senescence-inducible small RNA locus, as well as new regulation of known miRNAs and their target genes during senescence, many of which have established roles in nutrient responsiveness and cell structural integrity. In keeping with remobilization of nutrients thought to occur during senescence, many miRNAs and targets had opposite expression pattern changes between leaf and silique tissues during the progression of senescence. Taken together, these findings highlight the integral role that miRNAs may play in the remobilization of resources and alteration of cellular structure that is known to occur in senescence.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43fa0a7047b87994666bbcee8cd6638eTest
https://doi.org/10.1111/pce.12393Test

المؤلفون: P. Le Gouée, Jean-Christophe Avice, Nathalie Nesi, Alain Ourry, M. Abdallah, Olivier Cantat, Sylvain Diquélou, X. Sarda

المساهمون: Ecophysiologie Végétale, Agronomie et Nutritions (EVA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Recherche Agronomique (INRA), Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Littoral, Environnement, Télédétection, Géomatique (LETG - Caen), Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG), Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN), Université de Nantes (UN)-Université de Nantes (UN)-Université de Caen Normandie (UNICAEN), Université de Nantes (UN)-Université de Nantes (UN), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-Université de Nantes (UN)-École pratique des hautes études (EPHE)-Université de Brest (UBO)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN), AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA)

المصدر: Journal of Agricultural Science
Journal of Agricultural Science, 2014, 152 (4), pp.616-633. ⟨10.1017/S0021859613000105⟩
Journal of Agricultural Science, Cambridge University Press (CUP), 2014, 152 (4), pp.616-633. ⟨10.1017/S0021859613000105⟩

مصطلحات موضوعية: 0106 biological sciences, DIFFERENT GROWTH-STAGES, [SDV]Life Sciences [q-bio], Brassica, engineering.material, S UPTAKE, 01 natural sciences, Lolium perenne, chemistry.chemical_compound, Human fertilization, Nitrate, NITROGEN USE EFFICIENCY, Genetics, LEAF SENESCENCE, Sulfate assimilation, LOLIUM-PERENNE, 2. Zero hunger, biology, food and beverages, 04 agricultural and veterinary sciences, 15. Life on land, REMOBILIZATION, biology.organism_classification, BRASSICA-NAPUS L, YIELD, SEED QUALITY, Agronomy, chemistry, Glucosinolate, Soil water, 040103 agronomy & agriculture, engineering, 0401 agriculture, forestry, and fisheries, Animal Science and Zoology, SULFATE ASSIMILATION, Fertilizer, Agronomy and Crop Science, 010606 plant biology & botany

الوصف: SUMMARYSulphur (S) is one of the six main macroelements required to sustain the growth of plants. Sources include soil, fertilizer and atmospheric deposition, which has been reduced by 85% over the last three decades. Risks of S deficiencies are now recognized in high S-demanding species such as Brassica napus L. With the aims of evaluating the risk of excessive or insufficient fertilization and identifying robust relationships that may be used as plant S status indicators, 57 commercial crops of oilseed rape were selected among contrasting soils and along a rainfall gradient that may affect soil S availability. Cultivation practices were investigated and the S and nitrogen (N) concentrations of soil, senescing leaves, stems and seeds were analysed. Despite an excessive organic N supply and large variation in S supply (from 0 to 112 kg S/ha), principal component analysis using 43 parameters indicated that seed yield was poorly related to N and S fertilization rates. While the N and protein-N concentrations in seeds were inversely related to oil and glucosinolate concentrations, they were linked to S and sulphate (SO42−) accumulation in the seeds. Sulphate concentrations in senescing leaves, stems or seeds could be deduced from total S concentrations, as they were positively and highly correlated. Sulphate accounted for on average 0·69 of total S in senescing leaves with minimum and maximum values of 0·007 and 0·94, which revealed conditions of limited and excess supply of S, respectively. This high variation of SO42− concentration in leaves can be interpreted as the result of its mobilization triggered by S deficiency, but cannot be used alone as an indicator of plant S status. A comparison with plants grown in controlled conditions under different S supplies suggests that the intensity of S starvation affects N metabolism, leading to NO3− (nitrate) accumulation. It is further suggested that dual evaluation of SO42− and NO3− concentrations in senescing leaves could be used at the vegetative stage as a field indicator to adjust S fertilization.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03f5b031bb29cc0c5cf42a89161572faTest
https://doi.org/10.1017/s0021859613000105Test