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Effects of melatonin-treated Nasturtium officinale on the growth and cadmium accumulation of subsequently grown rice seedlings

文献类型： 外文期刊

作者： Shi, Jun 1 ; Xiang, Zufen 1 ; Peng, Tao 1 ; Li, Hongyan 2 ; Huang, Kewen 3 ; Liu, Dingyou 1 ; Huang, Tingyou 1 ;

作者机构： 1.Mianyang Acad Agr Sci, Inst Rice Res, Mianyang, Sichuan, Peoples R China

2.Sichuan Agr Univ, Inst Pomol & Olericulture, Chengdu, Peoples R China

3.Sichuan Agr Univ, Coll Hort, Chengdu, Peoples R China

关键词： Nasturtium officinale; succession cropping; rice seedlings; cadmium; growth

期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY （ 影响因子：2.826； 五年影响因子：2.215 ）

ISSN： 0306-7319

年卷期：

页码：

收录情况： SCI

摘要： To study how melatonin (MT) treatment of plants used for stubble affects the heavy metal accumulation of the subsequent crop, the effects of MT-treated Nasturtium officinale on the growth and cadmium (Cd) accumulation of subsequently grown rice seedlings were investigated in a pot experiment. Stubble from N. officinale treated with low concentrations (25 and 50 mu mol kg(-1)) of MT increased the shoot biomass of rice seedlings, whereas other concentrations (100, 150, and 200 mu mol kg(-1)) caused a decrease or had no significant effect. Nasturtium officinale stubble from plants treated with different MT concentrations also affected the rice-seedling contents of photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids) and reduced the activities of antioxidant enzymes (superoxide dismutase, peroxidase, and catalase). Prior treatment of N. officinale with MT (>25 mu mol kg(-1)) decreased the shoot Cd content and translocation factor of subsequently grown rice seedlings. To some extent, the application of a low concentration (25 and 50 mu mol kg(-1)) of MT to N. officinale sown before rice can therefore promote growth and inhibit Cd transport from roots to shoots of rice seedlings, with 25 mu mol kg(-1) found to be the optimal concentration.

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