Release of active oxygen from phytopathogenic bacteria and their regulation  

作　　者：LI Hongyu WANG JinshengKey Laboratory of Monitoring and Management of Plant Diseases and Pests, Ministry of Agriculture  Department of Plant Protection, Nanjing Agriculture University, Nanjing 210095, China Corresponding author 

出　　处：《Chinese Science Bulletin》1999年第1期71-75,共5页

摘　　要：Some phytopathogenic bacteria including Xanthomonas oryzae pv. oryzae （a rice leaf bacterial blight pathogen） and its virulent gene mutant XooM3105,Xanthomonas campestris pv. campestris, Erwinia carotovora subsp, carotovora and so on, could release active oxygen such as O₂ and H₂O₂ by themselves.Ca²⁺, NADPH and O₂ concentration regulated the response. The response is sensitive to heat and proteinase. These results show that the component releasing active oxygen in the bacterial plant pathogen may involve special protein and enzyme and be secreted to culture liquid. Various components of rice tissue can significantly induce the release of active oxygen in Xanthomonas oryzae pv. oryzae.Some phytopathogenic bacteria includingXanthomonas oryzae pv.oryzae (a rice leaf bacterial blight pathogen) and its virulent gene mutant XooM3105,Xanthomonas campestris pv.campestris, Erwinia carotovora subsp.carotovora and so on, could release active oxygen such as O2? and H2O2 by themselves. Ca2+, NADPH and O2 concentration regulated the response. The response is sensitive to heat and proteinase. These results show that the component releasing active oxygen in the bacterial plant pathogen may involve special protein and enzyme and be secreted to culture liquid. Various components of rice tissue can significantly induce the release of active oxygen inXanthomonas oryzae pv.oryzae.

关 键 词：phytopathogenic bacteria RELEASE of active oxygen rice BACTERIAL LEAF blight PATHOGEN interaction between HOST and PATHOGEN signal transduction. 

分 类 号：Q935[生物学—微生物学]