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首页> 外文期刊>Israel Journal of Plant Sciences >A factor from Azospirillum brasilense inhibits germination and radicle growth of Orobanche aegyptiaca
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A factor from Azospirillum brasilense inhibits germination and radicle growth of Orobanche aegyptiaca

机译:巴西固氮螺菌的一个因子抑制埃及古猿(Orobanche aegyptiaca)的发芽和胚根生长

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摘要

Cells of the bacterium Azospirillum brasilense contain an alcohol soluble, low-molecular-weight compound (MW of 1000 Da or less) that inhibits the germination and radicle growth of conditioned seeds of Orobanche aegyptiaca, when applied together with the germination stimulant GR24. Partial characterization of the compound suggests that it is a small peptide. A number of synthetic peptides were tested for the inhibitory activity. At least two peptides, one linear and one cyclic, had similar effects on the seeds as those caused by the factor that was extracted and partially purified from cells of A. brasilense. We suggest that the factor present in Azospirillum and the synthetic peptides may act by competing for the site of binding of the germination stimulant.
机译:巴西拟螺旋体细菌的细胞包含一种可溶于醇的低分子量化合物(分子量为1000 Da或更低),当与发芽刺激剂GR24一起使用时,该化合物会抑制埃及古猿(Orobanche aegyptiaca)的条件化种子的发芽和胚根生长。该化合物的部分表征表明它是小肽。测试了许多合成肽的抑制活性。至少两种肽,一种线性的和一种环状的,对种子的作用与从巴西盲肠念珠菌细胞中提取并部分纯化的因子引起的相似。我们建议存在于偶氮螺旋菌和合成肽中的因子可能通过竞争发芽刺激剂的结合位点而起作用。

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