Biological Characteristics of Trichoderma viride and Their Effects on the Growth of Corn Seedlings Under Salt Stress
[Objective]To clarify the biological characteristics of Trichoderma viride and their mechanisms of alleviating salt stress in corn seedlings.[Method] The biological characteristics of a Trichoderma viride strain screened in the early stage were analyzed,and the effects of Trichoderma viride on corn seedling height,root length,aboveground dry weight,underground dry weight,root crown ratio,chlorophyll a content, chlorophyll b content,SOD,POD,CAT,PPO and other indicators under salt stress were measured,exploring the effects of Trichoderma viride on the growth and physiological indicators of corn seedlings under salt stress.[Result]The optimal growth temperature for the strain was 25 ℃;the requirements for light were not strict,but the colony diameter under 24 hours of darkness treatment was significantly higher than 12 hours of darkness+12 hours of light,and 24 hours of light;the strain grows fastest at pH=5.After adding different concentrations of spore suspension,the plant height,root length,dry weight of underground and aboveground parts,chlorophyll a and chlorophyll b content,SOD activity,POD activity, CAT activity,and PPO activity of corn seedlings showed a gradually increasing trend under salt stress.[Conclusion]The research results can provide basic data for improving the planting efficiency of corn in saline alkali soil.
万方数据
维普
