Stimulation des défenses naturelles des plantes

Olivier Klarzynski, Bernard Fritig
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引用次数: 36

Abstract

Some defense mechanisms of plants are of the passive type while others are induced after perception of the pathogenic microorganism (very specific gene-for-gene recognition) or of microbial components (non specific elicitors). These recognition events trigger an array of plant signals and a cascade of signalling pathways which activate a battery of metabolic alterations responsible for the observed induced resistance. These include the stimulated production of low molecular weight molecules with antibiotic activity, cell wall reinforcement by deposition and cross-linking of various macromolecules, and accumulation of a wide range of PR (‘pathogenesis-related’) proteins that exhibit direct and/or indirect antimicrobial activities. The present studies aim to caracterize natural elicitors or design chemical messengers capable of triggering an array of plant defense responses. Treatments of plants with elicitors could be an alternative strategy of crop protection with a more satisfactory preservation of the environment.

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刺激植物的自然防御
植物的一些防御机制是被动的,而另一些防御机制是在病原微生物感知(非常特异性的基因对基因识别)或微生物成分(非特异性激发子)后诱导的。这些识别事件触发了一系列植物信号和一系列信号通路,这些信号通路激活了一系列代谢变化,导致了观察到的诱导抗性。这些包括具有抗生素活性的低分子量分子的刺激产生,通过沉积和交联各种大分子来增强细胞壁,以及表现出直接和/或间接抗菌活性的大范围PR(“致病相关”)蛋白质的积累。目前的研究旨在描述自然激发子或设计能够触发一系列植物防御反应的化学信使。用激发子处理植物可能是一种更令人满意的环境保护作物保护的替代策略。
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