| 乳熟阶段短期高温对不同品种早籼稻直链淀粉含量和RVA谱特征参数的影响 |
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| 引用本文： | 杨军,陈小荣,朱昌兰,彭小松,贺晓鹏,傅军如,欧阳林娟,边建民,胡丽芳,贺浩华.乳熟阶段短期高温对不同品种早籼稻直链淀粉含量和RVA谱特征参数的影响[J].中国农业气象,2014(5):549-555. |
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| 作者姓名： | 杨军 陈小荣 朱昌兰 彭小松 贺晓鹏 傅军如 欧阳林娟 边建民 胡丽芳 贺浩华 |
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| 作者单位： | 江西农业大学农学院/作物生理生态与遗传育种教育部重点实验室,南昌330045 |
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| 基金项目： | 公益性行业（气象）科研专项（GYHY201406025;GYHY201006025）;公益性行业（农业）科研专项（201403002）;赣鄱英才555工程“性状机能协调型双季超级稻的选育与应用”;2012年超级稻新品种选育与示范项目“开展长江中下游稻区超级早稻新品种选育与示范”;江西省研究生创新专项资金项目（YC2013-B027） |
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| 摘 要： | 以2个杂交稻（淦鑫203和金优402）和4个常规稻（中531、B670、E134和ST66）为材料,于水稻乳熟期进行高温处理3d,处理温度分别为35℃和38℃,以同期田间自然温度为对照,研究乳熟期高温对不同品种早籼稻直链淀粉含量和RVA谱特征参数的影响,并对稻米淀粉RVA谱特征值与直链淀粉含量进行相关分析.结果表明,无论是对照还是高温处理,中531和B670的直链淀粉含量、消减值及回复值较低,但崩解值较高,而E134和ST66表现为直链淀粉含量、消减值及回复值较高,崩解值较低;杂交稻淦鑫203和金优402则介于两者中间.与对照相比,38℃高温显著降低淦鑫203、金优402、中531和E134的崩解值,显著提高淦鑫203、中531的消减值、显著降低金优402、中531、B670和E134的回复值.各处理淀粉RVA谱变化趋势较一致,但因品种及温度而略有差异.38℃高温处理下稻米淀粉黏滞性曲线始终低于对照,但常规稻中531和B670的RVA谱形态与对照差异不大.此外,稻米直链淀粉含量与RVA谱各特征值间存在显著相关性.
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| 关 键 词： | 早籼稻 乳熟期 高温 淀粉RVA谱 直链淀粉含量 |
Effects of Short-term High Temperature on Amylose Content and RVA Profile Characteristic Parameters in Different Early Indica Rice Varieties at Milk Stage |
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| YANG Jun,CHEN Xiao-rong,ZHU Chang-lan,PENG Xiao-song,HE Xiao-peng,FU Jun-ru,OUYANG Lin-juan,BIAN Jian-min,HU Li-fang,HE Hao-hua.Effects of Short-term High Temperature on Amylose Content and RVA Profile Characteristic Parameters in Different Early Indica Rice Varieties at Milk Stage[J].Chinese Journal of Agrometeorology,2014(5):549-555. |
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| Authors: | YANG Jun CHEN Xiao-rong ZHU Chang-lan PENG Xiao-song HE Xiao-peng FU Jun-ru OUYANG Lin-juan BIAN Jian-min HU Li-fang HE Hao-hua |
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| Institution: | (College of Agronomy,Jiangxi Agricultural University/Key Laboratory of Crop Physiology,Ecology and Genetic Breeding,Ministry of Education, Nanchang 330045 ,China) |
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| Abstract: | Two hybrid rice varieties（Ganxin203 and Jinyou402） and four conventional rice varieties （Zhong531,B670,E134,and ST66）were used as materials.They were exposed at 35℃ and 38℃ for 3 days at milk stage and compared with the controls in the field of natural temperature in the same time period.The effects of high temperature at milk stage on amylose content and starch RVA profile characteristic parameters in different early indica rice varieties were discussed.Furthermore,the correlation between starch RVA profile characteristic values and amylose content was analyzed.The results showed that Zhong531 and B670 had a large breakdown and a low amylose content,setback,and consistency both at the controls and high temperature treatments.On the contrary,E134 and ST66 had a small breakdown and a high amylose content,setback,and consistency,and the case for hybrid rice Ganxin203 and Jinyou402 was in the middle across all treatments.Compared with the control,38℃ high temperature decreased significantly the breakdown of Ganxin203,Jinyou402,Zhong531 and E134,and increased significantly the setback of Ganxin203 and Zhong531,and decreased significantly the consistency of Jinyou402,Zhong531,B670and E134,respectively.The processing of starch RVA profile in all treatments was broadly similar,but the morphology of starch RVA profile between varieties and temperature was slightly different.The rice starch viscosity curve under 38℃ high temperature was always lower than those of the controls,while the RVA profile characteristic values of Zhong531 and B670 were different from those of the controls.Moreover,the amylose content of rice starch was significantly correlated with RVA profile characteristic values. |
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| Keywords: | Early indica rice Milk stage High temperature stress RVA profile Amylose content |
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