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Molecular bases for differential aging programs between flag and second leaves during grain-filling in rice

Title
Molecular bases for differential aging programs between flag and second leaves during grain-filling in rice
Authors
Lee, ShinyoungJeong, HyobinLee, SichulLee, JinwonKim, Sun-JiPark, Ji-WonWoo, Hye RyunLim, Pyung OkAn, GynheungNam, Hong GilHwang, Daehee
DGIST Authors
Woo, Hye Ryun; Lim, Pyung Ok; Nam, Hong Gil; Hwang, Daehee
Issue Date
2017
Citation
Scientific Reports, 7(1)
Type
Article
Article Type
Article
ISSN
2045-2322
Abstract
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. © 2017 The Author(s).
URI
http://hdl.handle.net/20.500.11750/4458
DOI
10.1038/s41598-017-07035-9
Publisher
Nature Publishing Group
Related Researcher
  • Author Nam, Hong Gil CBRG(Complex Biology Research Group)
  • Research Interests Plant Senescence and Life History; Systems Biology; Complexbiology
Files:
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Collection:
ETC1. Journal Articles
New BiologyETC1. Journal Articles


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