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大豆疫霉根腐病是由大豆疫霉菌(Phytophthora sojae Kaufmann&Gerdemann)引起的一种严重危害大豆生产的土传性病害,可在大豆生长的各个时期对其造成危害。总多酚(polyphenol)是植保素的重要组成成分,与植物抗病性密切相关。研究将抗感不同的野生大豆接种大豆疫霉菌,并测定其根、茎、叶中总多酚的含量。结果表明:接种大豆疫霉根腐病菌后,抗感野生大豆根、茎、叶中总多酚活性在病程的大部分阶段均高于相应对照。总体而言,抗病野生大豆总多酚类物质含量变化幅度(30%,55%,-40%,-100%)高于感病野生大豆(20%,35%,50%,90%)。
Phytophthora infestans Root rot is a soil-borne disease caused by Phytophthora sojae Kaufmann & Gerdemann that severely endangers soybean production and can be harmful during various stages of soybean growth. Polyphenol is an important component of phytoalexin and is closely related to plant disease resistance. In this study, different resistant wild soybean were inoculated into Phytophthora sojae, and the content of total polyphenols in roots, stems and leaves was determined. The results showed that after inoculation with Phytophthora sojae, the total polyphenols activity in roots, stems and leaves of resistant soybean was higher than that of the corresponding control during most of the course. In general, the content of total polyphenols in disease-resistant wild soybean was higher than that of susceptible wild soybean (30%, 55%, -40%, -100%) (20%, 35%, 50%, 90% .