Response of peroxidase and catalase to acid rain stress during seed germination of rice, wheat, and rape |
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Authors: | Lihong WANG Xiaohua HUANG Qing ZHOU |
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Institution: | (1) Jiangnan University, Wuxi, 214122, China;(2) School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China;(3) College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing, 210097, China |
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Abstract: | Seed germination of plants with various acid-resistance display different responses to acid rain. To understand the reason
why such differences occur, the effects of simulated acid rain (pH 2.5–5.0) on the activities of peroxidase (POD) and catalase
(CAT) during seed germination of rice (O. sativa), wheat (T. aestivum), and rape (B. chinensis var. oleifera) were investigated. Results indicated that the maximum change in activities of CAT and POD by acid rain treatment with different
acidity and time in relation to the referent treatment without acid rain, was in the order: rice (28.8%, 31.7%) < wheat (34.7%,
48.3%) < rape (79.3%, 50.0%). The pH level for which the treatment with acid rain did not cause significant difference (p < 0.05) was in the order: rice (3.5).wheat (4.0).rape (5.0). Moreover, the change in activity of POD was higher than that
of CAT, which showed that POD was more sensitive to acid rain stress than CAT. The difference in the ability of POD and CAT
in removing free radicals was one reason why the germination indexes of these three species behaved differently.
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Translated from Environmental Science, 2005, 26(6): 123–125 译自: 环境科学] |
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Keywords: | acid rain stress rice wheat rape germination peroxidase (POD) catalase (CAT) |
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