Release of SOS2 kinase from sequestration with GIGANTEA determines salt tolerance in Arabidopsis

被引：261

作者：

Kim, Woe-Yeon ^{[1
]}

Ali, Zahir ^{[1
]}

Park, Hee Jin ^{[1
]}

Park, Su Jung ^{[1
]}

Cha, Joon-Yung ^{[1
]}

Perez-Hormaeche, Javier ^{[2
]}

Javier Quintero, Francisco ^{[2
]}

Shin, Gilok ^{[1
]}

Kim, Mi Ri ^{[1
]}

Qiang, Zhang ^{[1
]}

Ning, Li ^{[1
]}

Park, Hyeong Cheol ^{[1
]}

Lee, Sang Yeol ^{[1
]}

Bressan, Ray A. ^{[1
,3
,4
]}

Pardo, Jose M. ^{[2
]}

Bohnert, Hans J. ^{[1
,4
,5
,6
]}

Yun, Dae-Jin ^{[1
]}

机构：

[1] Gyeongsang Natl Univ, Grad Sch, Plant Mol Biol & Biotechnol Res Ctr, Div Appl Life Sci,Program BK21, Jinju 660701, South Korea

[2] CSIC, Inst Recursos Nat & Agrobiol, Seville 41012, Spain

[3] Purdue Univ, Dept Hort & Landscape Architecture, W Lafayette, IN 47907 USA

[4] King Abdulaziz Univ, Coll Sci, Jeddah 21589, Saudi Arabia

[5] Univ Illinois, Dept Plant Biol, Urbana, IL 61801 USA

[6] Univ Illinois, Dept Crop Sci, Urbana, IL 61801 USA

来源：

NATURE COMMUNICATIONS | 2013年 / 4卷

关键词：

CIRCADIAN CLOCK; PLASMA-MEMBRANE; NA+/H+ ANTIPORTER; LOW-TEMPERATURE; PLANT-GROWTH; THALIANA; PROTEIN; GENE; STRESS; LIGHT;

D O I：

10.1038/ncomms2357

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Environmental challenges to plants typically entail retardation of vegetative growth and delay or cessation of flowering. Here we report a link between the flowering time regulator, GIGANTEA (GI), and adaptation to salt stress that is mechanistically based on GI degradation under saline conditions, thus retarding flowering. GI, a switch in photoperiodicity and circadian clock control, and the SNF1-related protein kinase SOS2 functionally interact. In the absence of stress, the GI: SOS2 complex prevents SOS2-based activation of SOS1, the major plant Na+/H+-antiporter mediating adaptation to salinity. GI overexpressing, rapidly flowering, plants show enhanced salt sensitivity, whereas gi mutants exhibit enhanced salt tolerance and delayed flowering. Salt-induced degradation of GI confers salt tolerance by the release of the SOS2 kinase. The GI-SOS2 interaction introduces a higher order regulatory circuit that can explain in molecular terms, the long observed connection between floral transition and adaptive environmental stress tolerance in Arabidopsis.

引用

页数：12

共 53 条

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