深夜草莓app破解版

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深夜草莓app破解版» 新闻动态» 最新论文

深夜草莓app破解版:Cotyledons facilitate the adaptation of early-maturing soybean varieties to high-latitude long-day environments

  Xin Xu,Lixin Zhang,Xiaoning Cao,Lifeng Liu,Bingjun Jiang,Chunlei Zhang,Hongchang Jia,Xiangguang Lyu,Yumei Su,Yupeng Cai,Luping Liu,Shengrui Zhang,Fulu Chen,Cunxiang Wu,Bin Liu,Wensheng Hou,Shi Sun,Jinsheng Lai,Tianfu Han

  Plant, Cell & Environment 2021 IF: 7.228

  https://doi.org/10.1111/pce.14120

  Abstract

  Soybean (Glycine max), a typical short-day plant (SDP) domesticated in temperate regions, has expanded to high latitudes where daylengths are long from soybean emergence to bloom, but rapidly decrease from seed filling to maturity. Cotyledons are well known as the major storage organs in seeds, but it is unclear whether developing cotyledons store flowering substances at filling stage in SD for upcoming seedlings, or instead respond to photoperiod for floral induction after emergence of matured seeds in long-day (LD). Here, we report that cotyledons accelerate flowering of early-maturing varieties not resulting from stored floral stimuli but by perceiving photoperiod after emergence. We found that light signal is indispensable to activate cotyledons for floral induction, and flowering promoting gene GmFT2a is required for cotyledon-dependent floral induction via upregulation of floral identity gene GmAP1. Interestingly, cotyledons are competent to support the entire life cycle of a cotyledon-only plant to produce seeds, underlying a new photoperiod study system in soybean and other dicots. Taken together, these results demonstrate a substantial role for cotyledons in flowering process, whereby we propose a ‘cotyledon-based self-reliance’ model highlighting floral induction from emergence as a key ecological adaptation for rapid flowering of SDPs grown in LD environments at high latitudes.



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