Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9455502 | Environment International | 2005 | 7 Pages |
Abstract
A glasshouse pot experiment was conducted to study the effect of arbuscular mycorrhizal (AM) colonization by Glomus mosseae BEG167 on the yield and arsenate uptake of tomato plants in soil experimentally contaminated with five As levels (0, 25, 50, 75 and 150 mg kgâ 1). Mycorrhizal colonization (50-70% of root length) was little affected by As application and declined only in soil amended with 150 mg As kgâ 1. Mycorrhizal colonization increased plant biomass at As application rates of 25, 50 and 75 mg kgâ 1. Shoot As concentration increased with increasing As addition up to 50 mg kgâ 1 but decreased with mycorrhizal colonization at As addition rates of 75 and 150 mg kgâ 1. Shoot As uptake increased with mycorrhizal colonization at most As addition levels studied, but tended to decrease with addition of 150 mg As kgâ 1. Total P uptake by mycorrhizal plants was elevated at As rates of 25, 50 and 75 mg kgâ 1, and more P was allocated to the roots of mycorrhizal plants. Mycorrhizal plants had higher shoot and root P/As ratios at higher As application rates than did non-mycorrhizal controls. The soil of inoculated treatments had higher available As than uninoculated controls, and higher pH values at As addition levels of 25, 50 and 75 mg kgâ 1. Mycorrhizal colonization may have increased plant resistance to potential As toxicity at the highest level of As contamination studied. Mycorrhizal tomato plants may have potential for phytoextraction of As from moderately contaminated soils or phytostabilization of more highly polluted sites.
Keywords
Related Topics
Life Sciences
Environmental Science
Environmental Chemistry
Authors
Y. Liu, Y.G. Zhu, B.D. Chen, P. Christie, X.L. Li,