枝叶凋萎病对杨梅根际菌根的影响

Effect of Myrica rubra blight disease on mycorrhizal fungi

探讨了枝叶凋萎病对其根围菌根的生长及侵染能力的影响。结果表明,较之健康杨梅的须根和菌根,发生枝叶凋萎病的杨梅其根部须根受到严重破坏,内部菌根菌丝多数崩解,根围土壤内的菌根孢子多数破裂、内容物泄露,病树根围分离到的饱满孢子与从健康杨梅树根围分离到的孢子相比其侵染西瓜和三叶草的能力大大下降,具体原因尚需进一步研究。

The fruit tree Myrica rubra （ called yangmei） is seriously damaged by blight disease in Zhejiang Province. The present study was conducted to investigate the effect of blight disease on growth and development of mycorrhizal fungi. The result indicated that the fiber content of infected tree was seriously damaged and resulted in the breakdown of mycorrhizal mycelia tissue on infected tree. The fungal spore cells were broken that caused a leakage of spore mass compared to the whole and intact spores in the control. Furthermore, there was low colonizing capability of spore found on infected tree rhizosphere compared to spores found on healthy tree. Our resuhs indicated that the blight disease inhibited the mycorrhizal fungal growth and development, though the exact interaction between two fungi was unknown, which should be investigated later.