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首页> 外文期刊>Journal of Plant Physiology >The elicitor-induced oxidative processes in leaves of Solanum species with differential polygenic resistance to Phytophthora infestans
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The elicitor-induced oxidative processes in leaves of Solanum species with differential polygenic resistance to Phytophthora infestans

机译：茄科植物叶片激发子诱导的氧化过程，对致病疫霉具有不同的多基因抗性

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摘要

Previous studies have shown that suspension-cultured cells of Solanum genotypes with various polygenic resistances to Phytophthora infestans differed in activities of early oxidative processes in response to culture filtrate (CF) from this pathogen. These studies have now been extended by analysing production of reactive oxygen species (ROS), lipid peroxidation and lipoxygenase (LOX, E.C.1.13.11.12) activity induced by CF in detached leaves of S. tuberosum cv Bzura and clone H-8105, polygenically resistant and susceptible, respectively, as well as S. nigrum, nonhost, completely resistant. The relative increase in the ROS production was higher in the susceptible clone H-8105 than in both resistant genotypes. Lipid peroxidation increased only in the nonhost S. nigrum. An increase in lipid peroxidation in S. nigrum leaves coincided with enhanced LOX activity. In both S. tuberosum genotypes, significant increases in LOX activity were delayed and unaccompanied by changes in the level of lipid peroxidation. LOX activity attained a higher level in both of the resistant genotypes than in the susceptible one. The present results suggest that the involvement of both ROS production and LOX activity in the defense strategy in Solanum species/P. infestans interactions.
机译：先前的研究表明，对致病疫霉具有多种多基因抗性的茄属基因型的悬浮培养细胞在响应于该病原体的培养滤液（CF）的早期氧化过程中具有不同的活性。现在，通过分析由CF诱导的马铃薯S. Bzura和克隆H-8105离体叶片中的活性氧（ROS）的产生，脂质过氧化和脂氧合酶（LOX，EC1.13.11.12）的活性，扩展了这些研究，具有多基因抗性和易感性，以及非宿主，完全抗性的黑链霉菌。易感克隆H-8105中ROS产生的相对增加高于两种抗性基因型。脂质过氧化仅在非宿主黑链霉菌中增加。黑芥中脂质过氧化的增加与增强的LOX活性相吻合。在两种马铃薯S.基因型中，LOX活性的显着增加被脂质过氧化水平的改变所延迟并且不伴有。在两种抗性基因型中，LOX活性均高于易感基因型。目前的结果表明，在茄属物种/ P的防御策略中，ROS的产生和LOX活性都参与了。感染行为。

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