生态环境学报2009，Vol.18Issue(5)：1746-1752,7.
AM真菌对烟草砷吸收及根际pH的影响
Effects of arbuscular mycorrhizal inoculation on arsenic uptake and rhizosphere pH of Nicotiana tabacum L.
摘要
Abstract
A culture experiment using agar plates was conducted to study arsenic (As).uptake and rhizosphere pH of tobacco (Nico-tiana tabacum L) seedlings inoculated with indigenous and nonindigenous arbuscular mycorrhizal (AM) fungi. In most cases, rhizosphere pH of seedlings, measured by a pH indicator contained in the agar, increased during the first hours and then decreased until the end of the experiment, while it increased continuingly in the case of nonmycorrhizal seedlings without As stress. No sig-nificant differences in shoot As concentrations were observed among all treatments. However, root As concentrations followed the markedly decreasing order: nonindigenous mycorrhizal seedlings > indigenous mycorrhizal seedlings > nonmycorrhizal seedlings in treatments without As stress. And, it was much higher in indigenous mycorrhizal seedlings than in nonindigenous mycorrhizal and nonmycorrhizal seedlings under low, medium and high As levels. These results indicated that AM fungi could affect As uptake of tobacco via regulating its rhizosphere pH, and with this form protect their host during As stress. Furthermore, the responses of AM fungi with different origins were observed different to the same As level.关键词
AM真菌/砷/pH/烟草Key words
axbuscular mycorrhizal fungi/ arsenic/ pH/ tobacco分类
资源环境引用本文复制引用
华建峰,林先贵,蒋倩..AM真菌对烟草砷吸收及根际pH的影响[J].生态环境学报,2009,18(5):1746-1752,7.基金项目
中国科学院知识创新工程项目(KZCX2-YW-408) （KZCX2-YW-408）
中国科学院创新团队国际合作伙伴计划项目(CXTD-Z2005-4) （CXTD-Z2005-4）
