| 不同水稻品种幼苗期耐盐性评价 |
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| 引用本文： | 张治振,李稳,周起先,孙伟,郑崇珂,谢先芝.不同水稻品种幼苗期耐盐性评价[J].作物杂志,2020,36(3):92-153. |
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| 作者姓名： | 张治振 李稳 周起先 孙伟 郑崇珂 谢先芝 |
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| 作者单位： | 1山东师范大学生命科学学院,250014,山东济南2山东省水稻研究所,250100,山东济南3山东省农业科学院,250100,山东济南 |
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| 基金项目： | 国家重点研发计划(2016YFD0100600);山东省农业良种工程项目(2019LZGC003);山东省重点研发计划项目(2019GNC106132);山东省农业科学院农业科技创新工程(CXGC2019G02) |
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| 摘 要： | 水稻是盐碱地改良利用的重要作物。水稻幼苗期对盐胁迫敏感,筛选幼苗期高耐盐水稻品种是利用水稻进行盐碱地改良的关键。通过分析收集的15个粳稻品种在盐胁迫下的形态和生理特性,综合评价不同水稻品种幼苗期的耐盐性。形态分析结果表明: 150mmol/L NaCl处理下,所有试验材料的生长均受到抑制,出现植株变矮、根长变短和叶片枯萎等表型,其中盐胁迫对宁粳44、南粳46和盐丰47（对照）生长抑制相对最弱,死叶率最低;200mmol/L NaCl处理下,宁粳44、南粳46和盐丰47的存活率最高。耐盐指数结果表明,盐丰47的综合性状最好,其次是南粳46和宁粳44。生理特性结果表明: 150mmol/L NaCl处理下所有试验材料的超氧化物歧化酶（SOD）活性及丙二醛、脯氨酸和可溶性糖含量均有所增加,其中南粳46的SOD活性较其他参试材料高;南粳46、盐丰47和宁粳44的丙二醛含量增加幅度较小,脯氨酸及可溶性糖含量增加幅度大于其他参试材料。推测南粳46、盐丰47和宁粳44具有较强的过氧化物清除能力和渗透调节能力,这可能是其幼苗期具有较强盐胁迫耐性的生理机制。综上所述,筛选到的幼苗期耐盐性较强的水稻品种为南粳46和宁粳44。
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| 关 键 词： | 水稻 耐盐性 幼苗期 生理特性 |
| 收稿时间： | 2019-11-09 |
Salt Tolerance Evaluation of Different Rice Varieties at Seedling Stage |
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| Zhang Zhizhen,Li Wen,Zhou Qixian,Sun Wei,Zheng Chongke,Xie Xianzhi.Salt Tolerance Evaluation of Different Rice Varieties at Seedling Stage[J].Crops,2020,36(3):92-153. |
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| Authors: | Zhang Zhizhen Li Wen Zhou Qixian Sun Wei Zheng Chongke Xie Xianzhi |
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| Institution: | 1College of Life Sciences, Shandong Normal University, Jinan 250014, Shandong, China2Shandong Rice Research Institute, Jinan 250100, Shandong, China3Shandong Academy of Agricultural Sciences, Jinan 250100, Shandong, China |
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| Abstract: | Rice is one of important crops for the improvement of saline-alkali soil. Seedling stage of rice is the most sensitive stage to salt stress. Therefore, screening of high salt-tolerance rice varieties at seedling stage is critical for the improvement of cultivation of saline-alkali soil. In this study, the morphological and physiological characteristics of 15 rice varieties under salt stress were analyzed to evaluate their salt-tolerance ability at seedling stage. Morphological analysis showed that the growth was repressed by 150mmol/L NaCl in all test materials, exhibiting reduced plant height, shortened root length and wilting leaves. Among them, the repressive effects of salt stress in Ningjing 44, Nanjing 46, and Yanfeng 47 (control) were relatively weak. Ningjing 44, Nanjing 46 and Yanfeng 47 had the highest survival rates under 200mmol/L NaCl treatment. Salt-tolerance index indicated that Yanfeng 47 ranked the highest, followed by Nanjing 46 and Ningjing 44. Analyses of physiological characteristics related to salt stress responses showed that superoxide dismutase (SOD) activity and contents of malondialdehyde (MDA), proline, and soluble sugar in all examined materials increased under salt stress. However, SOD activity of Nanjing 46 was higher than that in the other materials. Increase of MDA content in Nanjing 46, Yanfeng 47 and Ningjing 44 was relatively less than that in other materials under salt stress. The contents of proline and soluble sugar in Nanjing 46, Ningjing 44, and Yanfeng 47 increased higher than those in other materials examined. Therefore, it can be inferred that Nanjing 46, Yanfeng 47 and Ningjing 44 have strong peroxide scavenging capacity and osmotic adjustment ability, which probably contribute to high salt-tolerance at seedling stage. In conclusion, Nanjing 46 and Ningjing 44 were strong salt-tolerance varieties at seedling stage. |
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| Keywords: | Rice Salt-tolerance Seedling stage Physiological characteristic |
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