大豆根腐病菌对大豆幼苗生理生化指标的影响

Pathogen (Fusarium oxysporum) of soybean root rot impacting on biochemical and physiological indexes of soybean seedling

利用垂直板发芽试验研究了大豆于幼苗期被大豆根腐病菌(Fusariumoxysporum)侵染后幼苗形态建成、总糖含量、可溶性糖含量、丙二醛(MDA)含量以及胚根细胞膜透性的动态变化,并对其致病机制和寄主的抗病机理进行了相应的分析。结果表明:大豆根腐病菌(Fusariumoxysporum)在侵染过程中会使大豆侧根原基的产生进程出现滞缓,子叶的营养物质输出受阻,胚根的生长速度减慢,根冠比的动态平衡被破坏,胚根中的总糖含量与对照相比下降,可溶性糖含量、MDA含量升高,细胞膜透性增大。通过分析,认为可溶性糖含量、MDA含量和细胞膜透性可作为抗病育种和药剂调控与保护的研究靶标。

The young sprout appearance buildings as well as the dynamic changes in contents of general sugar, soluble sugar, MDA and membrane permeability in soybean radicels were studied after they were infected by Pathogen (Fusarium oxysporum) of soybean root rot by experiment of vertical plank germination. At the same time, the corresponding pathogenesis and resistance mechanism of host were analyzed. The results showed that Pathogen (Fusarium oxysporum) of soybean root rot could slow down germination process of soybean lateral root anlage, baffle output of nutrition, delay growing speed of radicel, break the dynamic balance of ratio of root to stem, make contents of general sugar lower by comparing with control, let contents of soluble sugar, MDA and membrane permeability higher in the course of invading. The author think that contents of soluble sugar, MDA and membrane permeability may be regarded as study target of desease resistance breeding, controlling and protection with medicines.