Effects of mycorrhizal inoculation of upland rice on uptake kinetics of arsenate and arsenite. Issue 2 (2nd March 2015)

• Record Type: Journal Article
• Authors: Wu, Fuyong; Liu, Xueping; Wu, Shengchun; Wong, Ming Hung
• Is Part Of: Journal of plant nutrition and soil science. Volume 178:Issue 2(2015:Apr.)
• Page Start: 333
• Page End: 338
• Publication Date: 2015-03-02
• Subjects: AM fungi -- inorganic arsenic -- Oryza sativa -- upland rice; Plants -- Nutrition -- Periodicals; Soil science -- Periodicals; 630
• DOI: 10.1002/jpln.201400461
• Languages: English
• ISSNs: 1436-8730

Abstract

Abstract: We assessed the effect of mycorrhizal inoculation on short‐term uptake kinetics of arsenate and arsenite by excised roots of upland rice ( Oryza sativa L. cv. Zhonghan 221). A concentration of 0.01–0.05 mM arsenic (As) differentially affected the influx rates of both arsenate and arsenite into rice roots non‐inoculated or inoculated with Glomus mosseae and G. versiforme . While Vmax for arsenate uptake by non‐mycorrhizal roots was 1.02 µmol g −1 fresh weight h −1, it was reduced by a factor of 2.4 for mycorrhizal roots (about 0.42 µmol g −1 fresh weight h −1 ) in the high‐affinity uptake system. However, at high concentrations of 0.5–2.5 mM As only G. versiforme was able to reduce As influx. The results show that mycorrhizal effects on As uptake of upland rice are both concentration and species‐specific.