Journal
MYCORRHIZA
Volume 26, Issue 4, Pages 299-309Publisher
SPRINGER
DOI: 10.1007/s00572-015-0669-9
Keywords
Rice; Arsenic; Arbuscular mycorrhizal fungi; Anaerobic/aerobic cultivation; Metal tolerance
Categories
Funding
- National Natural Science Foundation of China [41101246, 41471219]
- International Foundation for Science, Stockholm, Sweden [C/4973-1]
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A pot experiment was carried out to investigate the effects of water management and mycorrhizal inoculation on arsenic (As) uptake by two rice varieties, the As-resistant BRRI dhan 47 (B47) and As-sensitive BRRI dhan 29 (B29). Grain As concentration of B47 plants was significantly lower than that of B29, and grain As concentration of B47 was higher under flooding conditions than that under aerobic conditions. In general, mycorrhizal inoculation (Rhizophagus irregularis) had no significant effect on grain As concentrations, but decreased the proportion of inorganic arsenic (iAs) in grains of B47. The proportion of dimethylarsinic acid (DMA) in the total grain As was dramatically higher under flooding conditions. Results demonstrate that rice variety selection and appropriate water management along with mycorrhizal inoculation could be practical countermeasures to As accumulation and toxicity in rice grains, thus reducing health risks of As exposure in rice diets.
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