A developmental response to pathogen infection in Arabidopsis
A developmental response to pathogen infection in Arabidopsis
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DOI：
10.1104/pp.103.027094
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发表时间：
2003-09-01
期刊：
影响因子：
7.4
通讯作者：
Bergelson, J
中科院分区：
文献类型：
--
作者：
Korves, TM;Bergelson, J
我们提出的证据表明，敏感的拟南芥植物加速其生殖发育，并改变其拍摄架构，以应对三种不同的病原体。我们用两种细菌病原体，假单胞菌和野油菜黄单胞菌，以及一种卵菌，寄生霜霉感染2周龄的拟南芥幼苗。三种病原体的感染减少了开花时间和主花序上的气生分枝的数量。在没有竞争的情况下，P. lingae和P. parasitica感染也增加了基分支的发展。开花时间和分支反应受病原菌存在量的影响。大量病原菌引起的主花序上的分枝数量的变化最剧烈，但少量的P. erichingae引起最快的开花和最基部的分枝的产生。当RPS 2抗性防止可见的疾病症状时，但在高病原体剂量下以及当发生大量可见的过敏反应时，RPS 2抗性防止了发育的大变化。这些实验表明，不同的病原体在易感拟南芥的发育中引起类似的变化。我们建议，这些变化的开花时间和分支架构构成了一般的发展响应病原体感染，可能会影响耐受性和/或抗病性。
We present evidence that susceptible Arabidopsis plants accelerate their reproductive development and alter their shoot architecture in response to three different pathogen species. We infected 2-week-old Arabidopsis seedlings with two bacterial pathogens, Pseudomonas syringae and Xanthomonas campestris, and an oomycete, Peronospora parasitica. Infection with each of the three pathogens reduced time to flowering and the number of aerial branches on the primary inflorescence. In the absence of competition, P. syringae and P. parasitica infection also increased basal branch development. Flowering time and branch responses were affected by the amount of pathogen present. Large amounts of pathogen caused the most dramatic changes in the number of branches on the primary inflorescence, but small amounts of P. syringae caused the fastest flowering and the production of the most basal branches. RPS2 resistance prevented large changes in development when it prevented visible disease symptoms but not at high pathogen doses and when substantial visible hypersensitive response occurred. These experiments indicate that phylogenetically disparate pathogens cause similar changes in the development of susceptible Arabidopsis. We propose that these changes in flowering time and branch architecture constitute a general developmental response to pathogen infection that may affect tolerance of and/or resistance to disease.