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首页> 外文期刊>Cell research. >Alpha-picolinic acid, a fungal toxin and mammal apoptosis-inducing agent, elicits hypersensitive-like response and enhances disease resistance in rice
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Alpha-picolinic acid, a fungal toxin and mammal apoptosis-inducing agent, elicits hypersensitive-like response and enhances disease resistance in rice

机译:α-吡啶甲酸,一种真菌毒素和哺乳动物细胞凋亡诱导剂,引起过敏反应并增强水稻的抗病性

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摘要

Alpha-picolinic acid (PA), a metabolite of tryptophan and an inducer of apoptosis in the animal cell, has been reported to be a toxin produced by some of plant fungal pathogens and used in screening for disease resistant mutants. Here, we report that PA is an efficient apoptosis agent triggering cell death of hypersensitive-like response in planta. Confirmed by Fluorescence Activated Cell Sorter (FACS), rice suspension cells and leaves exhibited programmed cell death induced by PA. The PA-induced cell death was associated with the accumulation of reactive oxygen species that could be blocked by diphenylene iodonium chloride, indicating that the generation of reactive oxygen species was NADPH-oxidase dependent. We also demonstrated the induction of rice defense-related genes and subsequent resistant enhancement by PA against the rice blast fungus Magnaporthe grisea. Hence, it was concluded that the PA-stimulated defense response likely involves the onset of the hypersensitive response in rice, which also provides a simple eliciting tool for studying apoptosis in the plant cell.
机译:据报道,α-吡啶甲酸(色氨酸的代谢产物)是动物细胞中凋亡的诱导剂,它是某些植物真菌病原体产生的毒素,可用于筛选抗病突变体。在这里,我们报道PA是一种有效的细胞凋亡剂,可触发植物中超敏样反应的细胞死亡。经荧光激活细胞分选仪(FACS)确认,水稻悬浮细胞和叶片显示出PA诱导的程序性细胞死亡。 PA诱导的细胞死亡与可被联苯氯化碘阻断的活性氧的积累有关,这表明活性氧的产生是NADPH-氧化酶依赖性的。我们还证明了PA对稻瘟病菌Magnaporthe grisea的水稻防御相关基因的诱导和随后的抗性增强。因此,可以得出结论,PA刺激的防御反应可能涉及水稻的超敏反应的发生,这也为研究植物细胞凋亡提供了一个简单的引发工具。

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