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首页> 外文期刊>Journal of Chemical Ecology >Arabidopsis Ecotype Variability in Camalexin Production and Reaction to Infection by Alternaria brassicicola
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Arabidopsis Ecotype Variability in Camalexin Production and Reaction to Infection by Alternaria brassicicola

机译：Camalexin生产中的拟南芥生态型变异及其对交链孢霉的感染反应

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摘要

Camalexin production was compared in 24 ecotypes of Arabidopsis thaliana. Detached Arabidopsis leaves were inoculated with Cochliobolus carbonum, an incompatible pathogen of Arabidopsis, to test the ability of each ecotype to produce camalexin. Whole plants were inoculated with Alternaria brassicicola, a crucifer pathogen, to determine if there was a correlation between the ability of an ecotype to produce camalexin and its resistance to A. brassicicola. All ecotypes were capable of producing camalexin, but the amounts produced relative to the Columbia ecotype (used as a standard) varied within and among ecotypes, and among experiments. Different degrees of resistance to A. brassicicola were observed among ecotypes, both macroscopically and microscopically. Extraction of A. brassicicola-inoculated leaves revealed that only four ecotypes (two resistant and two susceptible) produced easily detectable amounts of camalexin in response to this pathogen. TLC plate bioassays suggested that A. brassicicola was relatively insensitive to camalexin, thus casting some doubt on the importance of this compound in defense. These studies suggest that the role of camalexin in disease resistance varies among different Arabidopsis populations in nature, and they provide some clues to other possible determinants of resistance to A. brassicicola.
机译：比较了24种生态型拟南芥中Camalexin的产量。将分离的拟南芥叶接种拟南芥的一种不相容病原体Cochliobolus carbonum，以测试每种生态型产生camalexin的能力。将整株植物用十字花科病原体接种链格孢菌（Alternaria braciicicola），以确定一种生态型产生卡马毒素的能力与其对拟杆菌的抗性之间是否存在关联。所有生态型均能产生卡马毒素，但相对于哥伦比亚生态型（用作标准）的生产量在生态型内和之间以及实验之间有所不同。在宏观和微观上观察到生态型之间对油菜曲霉的抗性程度不同。提取经A. brasicicola接种的叶片后发现，只有四种生态型（两种抗性和两种易感型）对这种病原体产生了可轻易检测到的camalexin量。 TLC平板生物测定表明，A。brasicicola对camalexin相对不敏感，因此对该化合物在防御中的重要性提出了一些疑问。这些研究表明，camalexin在抗病性中的作用在自然界中的不同拟南芥种群中有所不同，并且它们为抗黄铜霉菌的其他可能决定因素提供了一些线索。

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