Nitrogen remobilization and conservation, and underlying senescence‐associated gene expression in the perennial switchgrass Panicum virgatum
| العنوان: | Nitrogen remobilization and conservation, and underlying senescence‐associated gene expression in the perennial switchgrass Panicum virgatum |
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| المؤلفون: | Ivone Torres-Jerez, Ying Xu, Qin Ma, Jiading Yang, Eric Worley, Jun Li, Patrick X. Zhao, Michael K. Udvardi, Gaoyang Li, Yuhong Tang |
| المصدر: | The New Phytologist |
| بيانات النشر: | John Wiley and Sons Inc., 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, Senescence, senescence, Perennial plant, Physiology, Nitrogen, Plant Science, Biology, Protein degradation, Panicum, 01 natural sciences, Transcriptome, 03 medical and health sciences, Gene Expression Regulation, Plant, transcription factors, Gene expression, Botany, Gene Regulatory Networks, Biomass, Phylogeny, Plant Proteins, Full Paper, Research, food and beverages, nitrogen remobilization, Full Papers, biology.organism_classification, Plant Leaves, 030104 developmental biology, Agronomy, Inflorescence, Shoot, gene expression, Panicum virgatum, switchgrass (Panicum virgatum), Seasons, Plant Shoots, 010606 plant biology & botany |
| الوصف: | Summary Improving nitrogen (N) remobilization from aboveground to underground organs during yearly shoot senescence is an important goal for sustainable production of switchgrass (Panicum virgatum) as a biofuel crop. Little is known about the genetic control of senescence and N use efficiency in perennial grasses such as switchgrass, which limits our ability to improve the process. Switchgrass aboveground organs (leaves, stems and inflorescences) and underground organs (crowns and roots) were harvested every month over a 3-yr period. Transcriptome analysis was performed to identify genes differentially expressed in various organs during development. Total N content in aboveground organs increased from spring until the end of summer, then decreased concomitant with senescence, while N content in underground organs exhibited an increase roughly matching the decrease in shoot N during fall. Hundreds of senescence-associated genes were identified in leaves and stems. Functional grouping indicated that regulation of transcription and protein degradation play important roles in shoot senescence. Coexpression networks predict important roles for five switchgrass NAC (NAM, ATAF1,2, CUC2) transcription factors (TFs) and other TF family members in orchestrating metabolism of carbohydrates, N and lipids, protein modification/degradation, and transport processes during senescence. This study establishes a molecular basis for understanding and enhancing N remobilization and conservation in switchgrass. |
| اللغة: | English |
| تدمد: | 1469-8137 0028-646X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8519ccc54c658981f18880f201cff894Test http://europepmc.org/articles/PMC6680227Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....8519ccc54c658981f18880f201cff894 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14698137 0028646X |
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