Antioxidative responses of Elodea nuttallii (Planch.) H. St. John to short-term iron exposure.
Antioxidative responses of Elodea nuttallii (Planch.) H. St. John to short-term iron exposure.
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DOI：
10.1016/j.plaphy.2010.08.006
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发表时间：
2010-10
期刊：
影响因子：
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通讯作者：
W. Xing;D. Li;Guihua Liu
中科院分区：
文献类型：
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作者：
W. Xing;D. Li;Guihua Liu
伊乐藻的抗氧化反应H.圣约翰短期铁暴露进行了研究。结果表明，E. nuttallii是浓度依赖性的。E.的生长低铁浓度（1-10 mg L−1[Fe 3 +]）对nuttallii的生长有促进作用，但当铁浓度超过10 mg L−1时，生长受到抑制。蛋白质和色素的合成在1-10 mg L−1[Fe 3 +]范围内增加。超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、过氧化物酶（POD）和谷胱甘肽-S-转移酶（GST）的活性在10 mg L−1[Fe 3 +]时达到最大值。高浓度的铁抑制蛋白质和色素的合成，抑制抗氧化酶的活性，加速色素的降解和活性氧的产生。低铁浓度对PSII最大量子效率、PSII活性和PSII相对电子传递速率无显著影响。丙二醛（MDA）和脯氨酸浓度分别在100和1 mg L-1[Fe 3 +]时最高。
Antioxidative responses of Elodea nuttallii (Planch.) H. St. John to short-term iron exposure were investigated in the study. Results showed that iron accumulation in E. nuttallii was concentration dependent. Growth of E. nuttallii was promoted by low iron concentration (1–10 mg L−1[Fe3+]), but growth inhibition was observed when iron concentration beyond 10 mg L−1. The synthesis of protein and pigments increased within 1–10 mg L−1[Fe3+] range. The activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and glutathione-S-transferase (GST) were up to maximal values at 10 mg L−1[Fe3+]. High iron concentration inhibited the synthesis of protein and pigments as well as activities of antioxidative enzymes, and accelerated degradation of pigment and production of ROS. Low iron concentration had no significant influences on PSII maximal quantum yield, activity of PSII and relative electron transport rate though PSII. Malondialdehyde (MDA) and proline concentrations were highest at 100 and 1 mg L−1[Fe3+], respectively.