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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (24): 25-32.doi: 10.11924/j.issn.1000-6850.casb15040109

所属专题： 生物技术； 水稻

• 农学 农业基础科学 • 上一篇    下一篇

抽穗扬花期高温胁迫对不同耐热性水稻生理指标的影响

马廷臣,夏加发,王元垒,李泽福   

  1. (安徽省农业科学院水稻研究所/安徽省水稻遗传育种重点实验室/国家水稻改良中心合肥分中心,合肥 230031）
  • 收稿日期:2015-04-14 修回日期:2015-04-26 接受日期:2015-04-27 出版日期:2015-08-26 发布日期:2015-08-26
  • 通讯作者: 马廷臣
  • 基金资助:
    农业部“948”项目“耐高温水稻新种质的引进与利用”(2014-Z62)；国家“863”计划“绿色超级稻新品种选育”(2014AA10A604)；转基因生物新品种培育科技重大专项“C4型高光效转基因水稻新种质的创制”(2011ZX08001-004)，安徽省省级（重点）实验室绩效项目“水稻耐热机理研究与耐热品种选育”(1206C0805010)；安徽省国际科技合作计划资助“水稻耐高温育种技术创新及利用研究”(12030603024)。

High Temperature Stress Effect on Physiological Indexes of Rice in Heading and Flowering Period

Ma Tingchen, Xia Jiafa, Wang Yuanlei, Li Zefu   

  1. (Rice Research Institute, Anhui Academy of Agricultural Sciences/Key Laboratory of Rice Genetics and Breeding of Anhui Province Hefei/Branch of National Rice Improvement Center, Hefei 230031)
  • Received:2015-04-14 Revised:2015-04-26 Accepted:2015-04-27 Online:2015-08-26 Published:2015-08-26

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摘要： 高温热害对水稻生产造成了巨大的损失，其危害机理研究刚刚起步。为了研究不同耐热性水稻在高温胁迫下主要生理指标的变化情况，对其生理指标与耐热性的关系进行分析。结果表明：不同品种的水稻，耐热性存在差异，可以通过耐热系数筛选不同的耐热品种；高温胁迫对不同耐热性水稻的生理指标有较大的影响，绝大多数的生理指标随高温处理时间延长，表现出先增大，达到峰值后下降的趋势；耐热性强的水稻品种，各个生理指标的峰值出现的较晚，耐热性差的品种，较早达到峰值；耐热系数和生理指标相关分析表明耐热系数除与MDA含量呈正相关关系外，与各生理指标上呈负相关关系，其中与CAT酶活性相关系数到达了-0.75222**。高温胁迫下，水稻水稻生理指标会发生很大的变化；每个生理指标基本都有峰值出现，表明生物体高温热害是应激物质等调节存在反馈机制；高温胁迫时生理指标变化与耐热性有一定的相关性。

关键词: 沙冬青, 沙冬青, 水分胁迫, 光合作用, 叶绿素荧光

Abstract: High temperature stress can cause great losses to rice production, but the research about its damage mechanism is still at the primary stage. We studied the changes of main physiological indexes of different heat resistant rice varieties under high temperature stress, in order to analyze the relationship between the physiological indexes and rice heat resistance. The results showed that there were differences of heat resistance among different rice varieties, and different heat resistant rice varieties could be screened by heat resistance coefficient. High temperature stress could have a great influence on physiological indexes of different heat resistant rice varieties, as the prolonging of treatment time, there was a peak of most physiological indicators. The peak of physiological indexes of strong heat resistant varieties appeared later than those of heat sensitive varieties. Correlation analysis on heat resistance coefficient and physiological indexes showed that there were a negative correlation between heat resistance coefficient and physiological indexes (POD, CAT, SOD and Pro), positive correlation between heat resistance coefficient and MDA. Further, the correlation coefficient between the heat resistance and CAT activity reached -0.75222**. Under high temperature stress, rice physiological indexes would change a lot. Each physiological index had a peak, showing that high temperature heat harm was the feedback mechanism of regulation of stress materials. There was certain correlation between change of physiological indexes and heat resistance under high temperature stress.