Evaluation of chilling sensitivity in different rice varieties. Relationship between screening procedures applied during germination and vegetative growth
Evaluation of chilling sensitivity in different rice varieties. Relationship between screening procedures applied during germination and vegetative growth
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DOI：
10.1007/bf00034606
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发表时间：
1996-01-01
期刊：
影响因子：
1.9
通讯作者：
Bouharmont, J
中科院分区：
文献类型：
--
作者：
Bertin, P;Kinet, JM;Bouharmont, J
利用不同的技术对水稻品种进行发芽期和营养生长期耐冷性的筛选。发芽过程中的温度的影响进行了研究，从10至25摄氏度。筛选在10摄氏度时最有效。为了区分发芽慢的品种和对低温敏感的品种，必须考虑数据收集的时间。在2叶期进行的低温存活试验（10 ℃）表明，不同的低温持续时间带来了互补的结果：较长的处理可以确定最耐受的品种，而较短的处理可以区分中间最敏感的水稻。在2叶期和8叶期进行的低温试验结果显示出很高的相关性。低温电解质渗漏和低温荧光也高度相关，彼此和生存测试应用在同一发展阶段。相反，低温发芽和低温存活之间的相关性较弱。因此，低温电解质渗漏率和低温荧光强度可以作为衡量植物营养生长过程中耐冷性的较好指标。讨论了在此阶段应用低温筛选程序预测其他发育阶段耐冷性的可能性。
Rice varieties were screened for chilling tolerance during germination and vegetative growth using different techniques. The effects of temperature during germination were investigated from 10 to 25 degrees C. The screening was most effective at 10 degrees C. Time of data collection has to be considered in order to discriminate slow germinating from chilling sensitive varieties. Chilling survival tests (10 degrees C) applied at the 2-leaf stage revealed that different chilling durations brought complementary results: the longer treatments allowed to identify the most tolerant varieties, while shorter treatments allowed to distinguish intermediate from most sensitive rices. Results of chilling tests applied at the 2- and the 8-leaf stages showed a high correlation. Low-temperature electrolyte leakage and low-temperature fluorescence were also highly correlated to each other and to survival tests applied at the same development stage. By contrast, weak correlations were observed between low temperature germination and plantlet chilling survival. It is concluded that low-temperature electrolyte leakage and low-temperature fluorescence are good indicators of chilling tolerance during the vegetative growth. The possibility to use a chilling screening procedure applied at this stage in order to predict the chilling tolerance at other development stages is discussed.