Analysis of Community Structure of Root Rot Pathogenic Fungi in Seedling Stageof Soybean Continuous Cropping

doi:10.11924/j.issn.1000-6850.casb15060053

Abstract

Abstract: Continuous cropping obstacle is the main factor that restricts the improvement of soybean quality and yield in Heilongjiang region. The aim of this study was to investigate the community structure of root rot pathogenic fungi in the continuous cropping of soybean which could lay a foundation for bio-control of the soybean root rot. In this study, the community structure of root rot pathogen in the seedling stage of root and soil samples of three soybean varieties planted in different duration of continuous cropping soil was analyzed by PCR-DGGE technology. The result showed that along with the extension of continuous cropping duration, the index of abundance and diversity of the three soybean varieties of root rot pathogen was increased in the seedling stage of root and soil samples; furthermore, the community structure of root rot pathogen was different among the soybean varieties. The result of cluster analysis verified that both the duration of continuous cropping and soybean variety had an effect on the community structure of root rot pathogen.

CLC Number:

S182

Cai Baiyan,Wang Liyang,Hu Wei,Jie Weiguang and Ling Hongzhi. Analysis of Community Structure of Root Rot Pathogenic Fungi in Seedling Stageof Soybean Continuous Cropping[J]. Chinese Agricultural Science Bulletin, 2015, 31(32): 92-98.

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