研究简报

铝毒和低磷胁迫下水稻幼苗抗氧化系统的响应

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  • 绍兴文理学院 生命科学学院,  浙江 绍兴 312000;

收稿日期: 2013-03-20

  修回日期: 2013-05-20

  网络出版日期: 2013-11-10

基金资助

浙江省自然科学基金资助项目(Y3100450)。

Involvement of Antioxidative Defense System in Rice Seedlings Exposed to Aluminum Toxicity and Phosphorus Deficiency

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  • Life Sciences Campus, Shaoxing University, Shaoxing 312000, China;

Received date: 2013-03-20

  Revised date: 2013-05-20

  Online published: 2013-11-10

摘要

采用营养液培养,研究了低磷、铝毒单独及复合胁迫对耐铝性不同的水稻基因型(甬优8号和秀水132)幼苗生长、叶绿素和游离脯氨酸含量、抗氧化酶活性和膜质过氧化水平的影响。结果表明,低磷和铝毒处理均显著抑制水稻幼苗生长,并导致叶绿素含量下降,叶片中游离脯氨酸和根系及叶片中丙二醛(MDA)含量大幅上升,根系中过氧化物酶(POD)和超氧化物歧化酶(SOD)活性上升,而叶片中两类抗氧化酶活性下降。胁迫处理对甬优8号的生长抑制更强,秀水132表现为耐铝兼耐低磷胁迫。复合处理下低磷可加剧铝毒对水稻幼苗生长的抑制,并诱发更严重的氧化胁迫。

本文引用格式

郭天荣*,姚鹏程,张子栋,王江佳,王梅 . 铝毒和低磷胁迫下水稻幼苗抗氧化系统的响应[J]. 中国水稻科学, 2013 , 27(6) : 653 -657 . DOI: 10.3969/j.issn.1001-7216.2013.06.013

Abstract

Plants growing in acid soils may suffer both phosphorus (P) deficiency and aluminum (Al) toxicity. Hydroponic experiments were undertaken to assess the single and combination effects of Al toxicity and low P stress on seedling growth, chlorophyll and proline contents, antioxidative response and lipid peroxidation of two rice genotypes (Yongyou 8 and Xiushui 132) differing in Al tolerance. Al toxicity and P deficiency both inhibited rice seedling growth. The development of toxic symptoms was characterized by reduced chlorophyll content, increased proline and malondialdehyde contents in both roots and leaves, and increased peroxidase and superoxide dismutase activities in roots, but decreased in leaves. The stress condition induced more severe growth inhibition and oxidative stress in Yongyou 8, and Xiushui 132 showed higher tolerance to both Al toxicity and P deficiency. P deficiency aggravated Al toxicity to plant growth and induced more severe lipid peroxidation.

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