由BONZAI1调控的单倍型特异性抗性基因介导拟南芥中温度依赖性生长控制。
A haplotype-specific Resistance gene regulated by BONZAI1 mediates temperature-dependent growth control in Arabidopsis.
作者信息
Yang Shuhua, Hua Jian
机构信息
Department of Plant Biology, Cornell University, Ithaca, NY 14853, USA.
出版信息
Plant Cell. 2004 Apr;16(4):1060-71. doi: 10.1105/tpc.020479. Epub 2004 Mar 18.
Abstract
Plant growth homeostasis and defense responses are regulated by BONZAI1 (BON1), an evolutionarily conserved gene. Here, we show that growth regulation by BON1 is mediated through defense responses. BON1 is a negative regulator of a haplotype-specific Resistance (R) gene SNC1. The bon1-1 loss-of-function mutation activates SNC1, leading to constitutive defense responses and, consequently, reduced cell growth. In addition, a feedback amplification of the SNC1 gene involving salicylic acid is subject to temperature control, accounting for the regulation of growth and defense by temperature in bon1-1 and many other mutants. Thus, plant growth homeostasis involves the regulation of an R gene by BON1 and the intricate interplay between defense responses and temperature responses.
摘要
植物生长稳态和防御反应受BONZAI1（BON1）调控，BON1是一个进化上保守的基因。在此，我们表明BON1对生长的调控是通过防御反应介导的。BON1是单倍型特异性抗性（R）基因SNC1的负调控因子。bon1-1功能缺失突变激活SNC1，导致组成型防御反应，进而细胞生长减少。此外，涉及水杨酸的SNC1基因的反馈放大受温度控制，这解释了bon1-1和许多其他突变体中温度对生长和防御的调控。因此，植物生长稳态涉及BON1对R基因的调控以及防御反应和温度反应之间的复杂相互作用。
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