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  • Title: [Effects of arbuscular mycorrhizal fungi on reactive oxygen metabolism of Citrus tangerine leaves under water stress].
    Author: Wu QS, Zou YN, Xia RX.
    Journal: Ying Yong Sheng Tai Xue Bao; 2007 Apr; 18(4):825-30. PubMed ID: 17615879.
    Abstract:
    In a pot experiment, this paper studied the effects of arbuscular mycorrhizal (AM) fungus Glomus versiforme (Karsten) Berch inoculation on the reactive oxygen metabolism of Citrus tangerine Hort. ex Tanaka leaves under water stress. The results showed that water stress decreased the colonization of G. versiforme on C. tangerine roots significantly, with a decrement of 33%. Under normal water supply and water stress, G. versiforme inoculation increased the leaf P content by 45% and 27%, and decreased the leaf malondialdehyde (MDA) and hydrogen peroxide (H2O2) contents by 25% and 21%, and 16% and 16%, respectively, compared with the control. Inoculation with G. versiforme enhanced the activities of leaf superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX), and increased the contents of leaf soluble protein, ascorbate (ASC) and total ascorbate (TASC) notably, regardless soil moisture condition. Under water stress, G. versiforme inoculation decreased the leaf superoxide anion radical (O2-*) content by 31%, compared with that under normal water supply. It was suggested that the drought resistance of C. tangerine leaves was enhanced after G. versiforme inoculation.
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