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温度胁迫对褐飞虱不同抗性水平水稻营养生长和生理指标的影响
作者: 王伟力1  2  黄立飞1  姜建军1  胡 雍3  陈红松1 *  杨 朗1  2 *  
单位: (1 广西农业科学院 植物保护研究所/广西作物病虫害生物学重点实验室  南宁 530007;2 广西大学 农学院  南宁 530004;  
关键词: 水稻  温度胁迫  生长  生理代谢  褐飞虱  抗性  
分类号:S511.01
出版年,卷(期):页码:2017 ,48 ( 2 ): 页码:231-237
摘要:

【目的】研究温度胁迫对褐飞虱不同抗性水平水稻营养生长和生理指标的影响,为抗虫稻种的选育及合理布局提供参考。【方法】分别将处于四叶一心期和拔节期的抗虫稻ASD7、高感稻TN1和感虫稻桂育9号(GY9)置于人工气候箱中,设高温恒温、高温变温、异常低温和对照(CK)4个处理,连续处理5 d后测定水稻叶宽、株高、生物量、株水含率及叶片可溶性糖和可溶性蛋白含量。【结果】四叶一心期和拔节期,不同褐飞虱抗性水平水稻品种的叶宽均以异常低温处理最宽,高温恒温处理最窄;株高、株鲜重及水含率在高、低温胁迫下均较CK有不同程度的降低;水稻株干重、叶片可溶性糖及可溶性蛋白含量在异常低温处理下较CK升高,在高温变温处理下较CK降低。同一温度处理下,GY9的叶宽、株高和生物量最高,且其拔节期的水稻叶片可溶性糖和可溶性蛋白含量也相对较高。【结论】感虫稻GY9在不同温度胁迫下的生长发育较快、生理代谢物质含量较高,对温度胁迫的耐受力相对较强,能够适应广西初夏多变的气候。

【Objective】In order to provide scientific reference for rational distribution and breeding of resistance rice varieties,the effects of temperature stress on vegetative growth and physiological indexes of rice varieties with different resistance levels to Nilaparvata lugens St■l were investigated. 【Method】The trials on resistant variety ASD7,highly susceptible variety TN1 and susceptible variety GY9 were conducted in environmental chamber for five days at four-leaf stage and jointing stage. The effects of temperature stress as constant high temperature,fluctuating high temperature,abnormal low temperature and control check(CK) on leaf width,plant height,biomass,water content in rice plant,soluble sugar and soluble protein content in rice leaf were measured. 【Result】Leaf width under abnormal low temperature was the widest,while the narrowest leaf width was observed under constant high temperature at the two tested growth periods. Plant height, fresh weight and water content under high and low temperature stress decreased to some extent compared with CK. Plant dry weight,soluble sugar and soluble protein content in leaf of all rice varieties increased under abnormal low temperature and decreased under fluctuating high temperature compared to CK. Under the same temperature, leaf width,plant height and biomass of GY9 were the highest,and soluble sugar and soluble protein content in leaf of GY9 were higher at jointing stage.【Conclusion】The rapid growth and high physiological metabolism substances content of susceptible rice variety GY9 under different temperature stresses present tolerance against temperature stress, thus it is able to adapt to the variable climate in early summer in Guangxi.

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