Effect of timing of heat stress during grain filling in two wheat varieties under moderate and very high temperature

文献类型： 外文期刊

第一作者： Song, W. F.

作者： Song, W. F.;Zhang, L. L.;Song, W. F.;Zhao, L. J.;Song, Q. J.;Zhao, H. B.;Zhang, Y. B.;Zhang, C. L.;Xin, W. L.;Sun, L. F.;Xiao, Z. M.;Zhang, X. M.;Zhang, Y. M.;Li, J. L.;Zhang, X. M.;Zhang, Y. M.;Li, J. L.

作者机构：

关键词： Wheat;post-anthesis heat stress;grain weight;rate of grain filling;duration of grain filling

期刊名称：INDIAN JOURNAL OF GENETICS AND PLANT BREEDING （ 影响因子：0.508； 五年影响因子：0.523 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： In order to examine the effect of short periods heat stress on grain growth, two cultivars (Longmai26 and Longmai30) were grown in pots at two different diurnal temperatures (32/22 degrees C; 25/15 degrees C) in climate-controlled growth cabinets and exposed to a 5-day heat stress (38/22 degrees C) at 5-day intervals throughout grain filling after anthesis.The results indicated that long periods of moderate high temperature (>30 degrees C) have higher effect than short periods of heat stress (5 days with maximum 38 degrees C for 6h each day). However, plants grown at the moderate temperature (25/15 degrees C) showed a greater response to a short period of heat stress than plants grown at the high temperature (32/22 degrees C). At elevated temperatures, the change in the rate of grain filling is smaller than duration of grain filling.The high grain-filling rate and high potential grain weight should be used as a criterion in selecting for high temperature tolerance in wheat.

分类号： S3

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