亚热带植物科学2016，Vol.45Issue(4)：301-307,7.DOI:10.3969/j.issn.1009-7791.2016.04.001
低pH对番茄幼苗菌根丛枝形成和磷营养功能的影响
Influences of Low pH on the Arbuscule Formation and Phosphorus Nutrition of Tomato Seedlings
摘要
Abstract
Tomato inoculated with 3 AMF species, Rhizophagus irregularis, Gigaspora margarita and Acaulospora delicata, at different pH values (4.5 or 6.5), the influences of low pH on the arbuscule formation and function of AMF in tomato roots were investigated. The results indicated that low pH significantly inhibited the AMF colonization and the arbuscule formation in roots. Three AMF species varied greatly with G. margarita showing the highest colonization and R. irregularis showing the most sensitive arbuscule abundance to low pH. AMF significantly elevated the plant biomass and decreased the root to shoot ratio. The effects of low pH on alkaline phosphatase (ALP) activity shared the similar pattern with those on root colonization. AMF significantly increased the shoot phosphorus content and the LePT4 expression in roots;however, pH did not affect them. These results suggested that low pH was inhibitory to the establishment and maintenance of AMF-host symbiosis, and the beneficial effects of AMF was greater at low pH. Moreover, different AMF species/isolates could vary greatly in the ability to increase the resistance of hosts to low pH.关键词
低pH/丛枝菌根真菌/丛枝形成/番茄Key words
low pH/arbuscular mycorrhizal fungi/arbuscule formation/tomato分类
农业科技引用本文复制引用
冯曾威,王宁,朱红惠,姚青..低pH对番茄幼苗菌根丛枝形成和磷营养功能的影响[J].亚热带植物科学,2016,45(4):301-307,7.基金项目
国家自然科学基金项目(31570395) （31570395）
