野生大豆内生真菌对作物促生作用的研究

Endophytic Fungi from Wild Soybean Promotes Crop Growth

为了实现绿色生态农业、农作提质增效,加快生防菌剂的研发进度。本研究利用具有广谱拮抗玉米大斑病和大豆疫霉病野生大豆内生真菌Y6R15和Y2S2为试材,通过菌液灌根和叶喷处理,分析不同处理下玉米和大豆苗期干物质和根系指标的变化。结果表明:拮抗菌株Y6R15对玉米叶片和根干重促生作用明显,均提高根长度、根表面积、根体积、根尖数等指标,以根冠比指标标准Y6R15叶喷效果为最佳方式,依据根系指标特征变化Y6R15灌根效果好于叶喷。拮抗菌株Y2S2和Y6R15处理均对大豆有促生作用,效果显著,Y6R15菌株对玉米和大豆均有促生作用。

To achieve the development of green ecological agriculture,improve agricultural quality and efficiency,and accelerate the research and development of biocontrol agents,the wild soybean endophytic fungi Y6R15 and Y2S2 with broad-spectrum antagonism against maize leaf spot and soybean phytophthora blight were used as test materials to analyze the changes of dry matter and root system indexes at the seedling stage of both maize and soybean under different treatments.The results showed that the antagonistic strain Y6R15 promoted the growth of maize leaves and dry weight of roots significantly,and increased the indexes of root length,root surface area,root volume and root tip number.Leaf spraying with the fungi agents Y6R15 based on the index of root-shoot ratio got the best effect,and the effect of root irrigation with Y6R15 agents based on the characteristics of root system was better than that of leaf spraying.Antagonistic strains Y2S2 and Y6R15 can both promote the growth of soybean,and Y6R15 can promote the growth of both corn and soybean.