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  • Title: β-ODAP accumulation could be related to low levels of superoxide anion and hydrogen peroxide in Lathyrus sativus L.
    Author: Jiao CJ, Jiang JL, Li C, Ke LM, Cheng W, Li FM, Li ZX, Wang CY.
    Journal: Food Chem Toxicol; 2011 Mar; 49(3):556-62. PubMed ID: 20510333.
    Abstract:
    Level of the neuroexcitatory β-N-oxalyl-L-α,β-diaminopropionic acid (β-ODAP) in grass pea (Lathyrus sativus L.) varies with development and environmental stress. Reactive oxygen species (ROS) (mainly O(2)ⁱ- and H(2)O(2)) are frequently reported to play important roles in plant development and in response to various stresses. To investigate the possible inter-relationship between contents of β-ODAP and ROS, grass pea leaves have been analyzed for contents of β-ODAP, O(2)ⁱ- and H(2)O(2). The results showed that leaves containing high levels of β-ODAP, exhibited low levels of O(2)ⁱ- and H(2)O(2), while leaves with high contents of O(2)ⁱ- and H(2)O(2) accumulated little β-ODAP. The application of pyridine or ABA which inhibit the production of O(2)ⁱ- or H(2)O(2) led to an increase in β-ODAP contents in intact or detached young leaves, whereas inhibition of catalase activity using AT (3-amino-1,2,4-triazole), leading to an increase in H(2)O(2) content, result in significant decrease in β-ODAP levels of detached young leaves. In addition, inoculation of Rhizobium to young seedlings enhanced O(2)ⁱ- and H(2)O(2) levels, but reduced β-ODAP contents in shoots. These results suggest that β-ODAP accumulation could be related to low levels of superoxide anion and hydrogen peroxide in grass pea tissues.
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