Arsenite transporters expression in rice (Oryza sativa L.) associated with arbuscular mycorrhizal fungi (AMF) colonization under different levels of arsenite stress
| Autor: | Hui Li, Wai Fung Chan, Ming Hung Wong, Shengchun Wu, Fuyong Wu, Xunwen Chen, Chuan Wu |
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| Rok vydání: | 2012 |
| Předmět: |
Environmental Engineering
Arsenites Health Toxicology and Mutagenesis Gene Expression Fungus Biology Crop chemistry.chemical_compound Mycorrhizae Botany Environmental Chemistry Soil Pollutants Hyperaccumulator Colonization Silicic acid Arsenite Plant Proteins Oryza sativa Inoculation fungi Public Health Environmental and Occupational Health food and beverages Oryza General Medicine General Chemistry biology.organism_classification Pollution chemistry |
| Zdroj: | Chemosphere. 89(10) |
| ISSN: | 1879-1298 |
| Popis: | As a silicon hyperaccumulator, lowland rice takes up higher levels of As than many other plants due to silicic acid and arsenite sharing the same transporters (Lsi1 and Lsi2). Glomus intraradices (AH01) was inoculated to rice under different arsenite concentrations (0, 2 and 8 μM) in order to investigate the interactions between arbuscular mycorrhizal fungus and rice on the accumulation of arsenite. The relative mRNA expressions of Lsi1 and Lsi2 resulted in a down-regulating trend in mycorrhizal plants. Under 2 μM arsenite treatments, Lsi1 and Lsi2 were significantly decreased, by 0.7-fold (P0.05) and 0.5-fold (P0.01), respectively, in mycorrhizal plants when compared with non-mycorrhizal plants. This led to the decrease of arsenite uptake per unit of root dry mass. No organic As species were detected in both roots and shoots. The As(III)/As(V) ratios indicated that mycorrhizal plants immobilized most of the arsenite proportion in the roots and prevented its translocation from the roots to the shoots. |
| Databáze: | OpenAIRE |
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