哈茨木霉在水稻体内的定殖及对水稻生理生化特性的影响

Colonization of Trichoderma hazianum in Rice and Their Effects on Physiology and Biochemistry of Rice

用哈茨木霉孢子悬浮液分别对水稻种子浸种、组培苗蘸根后,于相对无菌条件栽培至2叶一心期进行研究,结果表明,供试木霉菌可在水稻秧苗的根、茎、叶中稳定定殖和传导。有木霉菌在体内定殖的水稻秧苗,其生长势明显优于未定殖的秧苗,同时,秧苗对纹枯病的抗性也得以提高。表明木霉菌在水稻体内的定殖可能是促进水稻生长的原因之一。

The spore suspension of Trichoderma T2-16 was applied in rice by soaking and pruned-root dip. The colonizing dynamics of the strains in root, stem and leaf of rice and their effects on the plants growth were studied. The results showed that each method could led to colonization of T2-16strain in rice tissues, and conduct to internal stem, leaf and root stably. The growth potential of endophyte containing rice seedlings was superior to that of the control seedlings. Meanwhile, the activities of POD, PPO and PAL related to disease resistance were also increased; the endopyhtic fungi T2-16 could increase resistance of rice to Rhizoctonia solani. Therefore, it was concluded that Trichoderma colonized in rice might be one of the reasons to promote the rice growth.