Leaf-derived ABA regulates rice seed development via a transporter-mediated and temperature-sensitive mechanism.
Leaf-derived ABA regulates rice seed development via a transporter-mediated and temperature-sensitive mechanism.
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叶源 ABA 通过转运蛋白介导的温度敏感机制调节水稻种子发育
DOI:
10.1126/sciadv.abc8873
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发表时间:
2021-01
期刊:
影响因子:
13.6
通讯作者:
Li S
中科院分区:
文献类型:
--
作者:
Qin P;Zhang G;Hu B;Wu J;Chen W;Ren Z;Liu Y;Xie J;Yuan H;Tu B;Ma B;Wang Y;Ye L;Li L;Xiang C;Li S
A leaf-to-caryopsis abscisic acid transport mechanism ensures normal seed development in response to variable temperatures. Long-distance transport of the phytohormone abscisic acid (ABA) has been studied for ~50 years, yet its mechanistic basis and biological significance remain very poorly understood. Here, we show that leaf-derived ABA controls rice seed development in a temperature-dependent manner and is regulated by defective grain-filling 1 (DG1), a multidrug and toxic compound extrusion transporter that effluxes ABA at nodes and rachilla. Specifically, ABA is biosynthesized in both WT and dg1 leaves, but only WT caryopses accumulate leaf-derived ABA. Our demonstration that leaf-derived ABA activates starch synthesis genes explains the incompletely filled and floury seed phenotypes in dg1. Both the DG1-mediated long-distance ABA transport efficiency and grain-filling phenotypes are temperature sensitive. Moreover, we extended these mechanistic insights to other cereals by observing similar grain-filling defects in a maize DG1 ortholog mutant. Our study demonstrates that rice uses a leaf-to-caryopsis ABA transport–based mechanism to ensure normal seed development in response to variable temperatures.
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影响因子:
7.7
作者:
Waadt R;Hitomi K;Nishimura N;Hitomi C;Adams SR;Getzoff ED;Schroeder JI
通讯作者:
Schroeder JI
影响因子:
5.6
作者:
Bita CE;Gerats T
通讯作者:
Gerats T
影响因子:
27.5
作者:
Ma, Xingliang;Zhang, Qunyu;Liu, Yao-Guang
通讯作者:
Liu, Yao-Guang
影响因子:
6.9
作者:
Jiang, Fan;Hartung, Wolfram
通讯作者:
Hartung, Wolfram
影响因子:
7.4
作者:
Kuromori, Takashi;Sugimoto, Eriko;Shinozaki, Kazuo
通讯作者:
Shinozaki, Kazuo