Molecular bases for differential aging programs between flag and second leaves during grain-filling in rice
| Autor: | Sichul Lee, Gynheung An, Pyung Ok Lim, Sun-ji Kim, Jin-Won Lee, Hye Ryun Woo, Hyobin Jeong, Daehee Hwang, Shinyoung Lee, Ji-Won Park, Hong Gil Nam |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Chlorophyll Nitrogen Science Grain filling Biology Photosynthesis 01 natural sciences Models Biological Article 03 medical and health sciences Gene Expression Regulation Plant Botany High nitrogen RNA Messenger Nitrogen cycle Plant Physiological Phenomena Panicle chemistry.chemical_classification Multidisciplinary Phenylpropanoid Gene Expression Profiling food and beverages Oryza Amino acid Plant Leaves 030104 developmental biology chemistry Medicine Edible Grain Transcriptome 010606 plant biology & botany Flag (geometry) |
| Zdroj: | Scientific Reports, Vol 7, Iss 1, Pp 1-16 (2017) SCIENTIFIC REPORTS(7) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | Flag leaves (FL) and second leaves (SL) in rice show differential aging patterns during monocarpic senescence. Coordination of aging programs between FL and SL is important for grain yield and quality. However, the molecular bases for differential aging programs between FL and SL have not been systematically explored in rice. Here, we performed mRNA-sequencing of FL and SL at six time points during grain-filling and identified four molecular bases for differential aging programs between FL and SL: phenylpropanoid biosynthesis, photosynthesis, amino acid (AA) transport, and hormone response. Of them, photosynthesis (carbon assimilation) and AA transport (nitrogen remobilization) predominantly occurred in FL and SL, respectively, during grain-filling. Unlike other molecular bases, AA transport showed consistent differential expression patterns between FL and SL in independent samples. Moreover, long-distance AA transporters showed invariant differential expression patterns between FL and SL after panicle removal, which was consistent to invariant differential nitrogen contents between FL and SL after panicle removal. Therefore, our results suggest that the supplies of carbon and nitrogen to seeds is functionally segregated between FL and SL and that long-distance AA transport is an invariant core program for high nitrogen remobilization in SL. |
| Databáze: | OpenAIRE |
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