The Arabidopsis TOR kinase links plant growth, yield, stress resistance and mRNA translation
文献类型： 外文期刊
作者： Deprost, Dorothee 1 ; Yao, Lei 2 ; Sormani, Rodnay 2 ; Moreau, Manon 2 ; Leterreux, Guillaume 2 ; Nicolaie, Maryse 2 ; Bedu, Magali 2 ; Robaglia, Christophe 2 ; Meyer, Christian 2 ;
作者机构： 1.INRA, Inst Jean Pierre Bourgin, Unite Nutr Azotee Plantes, F-78000 Versailles, France
2.INRA, Inst Jean Pierre Bourgin, Unite Nutr Azotee Plantes, F-78000 Versailles, France; Beijing Acad Agr & Forest Sci, Agr Biotechnol Res Ctr, Beijing 100097, Peoples R China; Univ Mediterranee, Fac Sci Luminy, CNRS CEA, Lab Genet & Biophys Plantes, F-13009 Marseille, France
关键词： target of rapamycin; Arabidopsis; organ growth; mRNA translation; abscisic acid
期刊名称：EMBO REPORTS （ 影响因子：8.807； 五年影响因子：10.715 ）
ISSN： 1469-221X
年卷期： 2007 年 8 卷 9 期
页码：
收录情况： SCI
摘要： Plants, unlike animals, have plastic organ growth that is largely dependent on environmental information. However, so far, little is known about how this information is perceived and transduced into coherent growth and developmental decisions. Here, we report that the growth of Arabidopsis is positively correlated with the level of expression of the TARGET OF RAPAMYCIN ( TOR) kinase. Diminished or augmented expression of the AtTOR gene results in a dose-dependent decrease or increase, respectively, in organ and cell size, seed production and resistance to osmotic stress. Strong downregulation of AtTOR expression by inducible RNA interference also leads to a post-germinative halt in growth and development, which phenocopies the action of the plant hormone abscisic acid, to an early senescence and to a reduction in the amount of translated messenger RNA. Thus, we propose that the AtTOR kinase is one of the contributors to the link between environmental cues and growth processes in plants.
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