Title: Response of Physiological and Ecological Characteristics to Cu Stress of Gingili in Seedling
Abstract: The growth processes of gingili plants under the stress of different Cu2+concentrations and the changes of chlorophyll contents,MDA(malondialdehyde) contents,SOD(superoxide dismutase) activities and POD(peroxidase) activities in their leaves during the seedling period were studied through solution culture experiments.The results showed that(i) short treatment of lower concentration Cu2+ stimulated the seedling length,but longer treatment of higher concentration Cu2+ inhibited growth of the seedlings.Root length was sensitive to the Cu2+ treatment and inhibition effect on root length was detected above the 1.0 mg·L-1 of Cu2+.(ii) In general,Cu2+ stress restrained chlorophyll synthesis of the gingili leaves.However,in the short-time treatment,the content of chlorophyll increased first and then decreased with the increase of Cu2+ concentration.(iii) Cu2+ stress can stimulate SOD activity in the lower concentrations at the initial stage,but the activity turned to be restrained with the increase of Cu2+ concentrations.POD activity increased gradually with the Cu2+ increase of concentrations.(iv) Although SOD activities and POD activities can decrease the peroxidation degree of membrane,the antioxidant enzyme system of gingili itself can not resist the harm of Cu2+ pollution,so the MDA content was increasing gradually.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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