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المؤلفون: Makoto Watanabe, Toshihiro Watanabe, Yoko Watanabe, Satoshi Kitaoka, Qu Laiye, Takayoshi Koike
المصدر: Plants
Plants, Vol 9, Iss 1278, p 1278 (2020)
Volume 9
Issue 10مصطلحات موضوعية: 0106 biological sciences, Canopy, heterophyllous shoots, Psat–N relation, year-to-year variation, Plant Science, Photosynthesis, 010603 evolutionary biology, 01 natural sciences, Article, nitrogen remobilization rate, Japanese larch (Larix kaempferi), Water content, Ecology, Evolution, Behavior and Systematics, Jmax–N, J(max)-N, Vcmax–N, Ecology, biology, P-sat-N relation, fungi, Botany, food and beverages, biology.organism_classification, Photosynthetic capacity, V-cmax-N, Horticulture, Deciduous, QK1-989, Shoot, Larix kaempferi, Larch, 010606 plant biology & botany
الوصف: Japanese larch (Larix kaempferi = L. leptolepis) is often characterized by its high growth rate with heterophyllous shoots, but the functional differences of heterophyllous shoots still remain unclear. Recently, abrupt high temperature and drought during spring induced high photosynthetic rate via change in leaf morphology of the deciduous habit. In order to reveal the photosynthetic characteristics of both short and long-shoot needles of sunny canopy of the larch trees using a canopy tower, we calculated the seasonal change of gas exchange characters and leaf mass per area (LMA) and foliar nitrogen content (N) of heterophyllous needles: short and long-shoot needles over 3 years. No marked difference in light-saturated photosynthetic rates (Psat) was observed between short and long shoots after leaf maturation to yellowing, although the difference was obvious in a specific year, which only shows that seasonal change in temperature and soil moisture determines the in situ photosynthetic capacity of needles. The large annual and seasonal variations in Psat in both shoots were found to be mainly determined by climatic variations, while shoot types determined the strategy of their photosynthetic N utilization as well as the stomatal regulation.
وصف الملف: application/pdf
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fde7b107649ecdcf97f09e848a4d5c84Test
http://europepmc.org/articles/PMC7601333Test -
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المؤلفون: Jean-Christophe Avice, Marie-Françoise Niogret, Alain Bouchereau, Philippe Etienne, Marine Poret, Françoise Le Cahérec, Alexandra Girondé, Jacques Trouverie, Laurent Leport
المساهمون: Ecophysiologie Végétale, Agronomie et Nutritions (EVA), Institut National de la Recherche Agronomique (INRA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, 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 de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-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), Amélioration des Plantes et Biotechnologies Végétales (APBV), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), 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 Rennes (UR)-AGROCAMPUS OUEST
المصدر: Plants, Vol 5, Iss 1, p 1 (2015)
Plants
Plants, MDPI, 2016, 5 (1), pp.1. ⟨10.3390/plants5010001⟩
Plants; Volume 5; Issue 1; Pages: 1
Plants, 2016, 5 (1), pp.1. ⟨10.3390/plants5010001⟩مصطلحات موضوعية: 0106 biological sciences, Proteases, proteolysis, medicine.medical_treatment, Proteolysis, Plant Science, Vacuole, Biology, Protein degradation, Brassica napus, N remobilization, genotypic variability, acidic proteases, 01 natural sciences, Article, Serine, 03 medical and health sciences, Abscission, lcsh:Botany, Botany, medicine, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Plant breeding, ComputingMilieux_MISCELLANEOUS, Ecology, Evolution, Behavior and Systematics, 030304 developmental biology, 2. Zero hunger, 0303 health sciences, Protease, Ecology, medicine.diagnostic_test, food and beverages, lcsh:QK1-989, Biochemistry, 010606 plant biology & botany
الوصف: Winter oilseed rape is characterized by a low N use efficiency related to a weak leaf N remobilization efficiency (NRE) at vegetative stages. By investigating the natural genotypic variability of leaf NRE, our goal was to characterize the relevant physiological traits and the main protease classes associated with an efficient proteolysis and high leaf NRE in response to ample or restricted nitrate supply. The degradation rate of soluble proteins and D1 protein (a thylakoid-bound protein) were correlated to N remobilization, except for the genotype Samouraï which showed a low NRE despite high levels of proteolysis. Under restricted nitrate conditions, high levels of soluble protein degradation were associated with serine, cysteine and aspartic proteases at acidic pH. Low leaf NRE was related to a weak proteolysis of both soluble and thylakoid-bound proteins. The results obtained on the genotype Samouraï suggest that the timing between the onset of proteolysis and abscission could be a determinant. The specific involvement of acidic proteases suggests that autophagy and/or senescence-associated vacuoles are implicated in N remobilization under low N conditions. The data revealed that the rate of D1 degradation could be a relevant indicator of leaf NRE and might be used as a tool for plant breeding.
وصف الملف: application/pdf
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c43b1993cb97d1197f5bac4a316a2fcTest
http://www.mdpi.com/2223-7747/5/1/1Test