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不同氮素营养对干旱胁迫下水稻的影响
发表时间：2015-04-15 浏览量：1932 下载量：585
| 全部作者： | 江国彬，陈丹，汪婷，朱国辉 |
| 作者单位： | 华南农业大学生命科学学院 |
| 摘 要： | 聚乙二醇（PEG）模拟的轻度干旱胁迫下，不同氮素营养培养的水稻在生长及生理上存在明显差异。硝态氮营养下水稻根的干重、根长及根冠比均高于铵态氮培养水稻；同时，硝态氮培养水稻叶片丙二醛（MDA）的含量增加，而铵态氮下水稻MDA含量无明显区别。对2种氮素营养下水稻的酶活等测定表明，铵态氮营养较硝态氮培养水稻具有更高的过氧化物酶（peroxidase，POD）和过氧化氢酶（catalase，CAT）活性，且抗氧化物质谷胱甘肽（glutathione，GSH）的含量也高于硝态氮培养水稻，由此推测铵态氮营养可能有利于提高水稻的抗氧化能力，适应干旱等逆境胁迫。 |
| 关 键 词： | 植物学；干旱胁迫；铵态氮；硝态氮；抗氧化酶 |
| Title： | Effects of different nitrogen nutrition on rice seedlings under drought stress |
| Author： | JIANG Guobin, CHEN Dan, WANG Ting, ZHU Guohui |
| Organization： | College of Life Sciences, South China Agricultural University |
| Abstract： | Growth and physiological adaptation between ammonium and nitrate-treated rice showed significant difference when subjected to PEG-mimic light drought stress. Higher root dry weigh, root length and root/shoot ratio were observed in rice seedlings treated by ammonium nitrogen compared with nitrate nitrogen. The content of malondialdehyde (MDA) was increased in nitrate-N treated rice leaves while it showed no obvious difference in ammonium-N treated ones. The enzyme assays showed that activities of two anti-oxidative enzymes, peroxidase (POD) and catalase (CAT), and the content of a non-enzymic antioxidant, glutathione (GSH), were higher in ammonium-fed rice leaves than that in nitrate-fed ones, indicating that ammonium nutrition was benefit for rice plants to improve drought stress resistance during growth and development. |
| Key words： | botany; drought stress; ammonium-N; nitrate-N; anti-oxidative enzyme |
| 发表期数： | 2015年4月第7期 |
| 引用格式： | 江国彬，陈丹，汪婷，等. 不同氮素营养对干旱胁迫下水稻的影响[J]. 中国科技论文在线精品论文，2015，8（7）：680-684. |
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