Effects of high air temperature on ripening in rice plants - Analysis of ripening performance in growth chamber experiments
Effects of high air temperature on ripening in rice plants - Analysis of ripening performance in growth chamber experiments
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DOI：
10.1626/jcs.69.391
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发表时间：
2000-09-01
影响因子：
--
通讯作者：
Morita, S
中科院分区：
文献类型：
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作者：
Morita, S
研究了日本福山市8月份常见的高温（32℃/23℃最大/分钟；27.5℃，日平均温度）对水稻籽粒重量和籽粒品质的影响。生长室中的空气温度是人工控制的。在穗的所有初生分枝中，32℃/23℃下的粒重低于作为对照的28℃/19℃下的粒重。 32℃/23℃时正常谷物相对于所有谷物的比例较小。另外，35℃/26℃下的粒重以及正常粒占总粒的比例比32℃/23℃下的粒重小。高温下粒重的减少伴随着粒厚的减少。未完全成熟的谷物的比例；相对于全部籽粒的比例，32℃/23℃高于28℃/19℃，未受精籽粒比例在35℃/26℃高于32℃/23℃。 35℃/26℃粒重与28℃/19℃粒重比低于90%的品种有大粒的“森泽”、“阿博里奥”、“明之星”，其成熟性能容易变差。相比之下，比例高于95%的品种是Koganemasari、小粒的Lakhi Jhota和被称为成熟良好品种的Hoshiyutaka。
The effects of high temperature (32 degreesC/23 degreesC max/min; 27.5 degreesC, daily mean temperature), which is common ill August in Fukuyama city, Japan, on the grain weight and the grain quality of rice plants were examined. Air temperature was controlled artificially in growth chambers. The grain weight at 32 degreesC/23 degreesC was lower than at 28 degreesC/19 degreesC as a control in all primary branches at a panicle. The proportion of normal grains relative to all grains was smaller at 32 degreesC/23 degreesC. Moreover, the grain weight and the proportion of normal grains relative to all grains at 35 degreesC/26 degreesC were smaller than those at 32 degreesC/23 degreesC. The decrease in grain weight at high temperature accompanies the decrease in grain thickness. The proportion of imperfectly ripened grain; relative to all grains at 32 degreesC/23 degreesC was higher than that at 28 degreesC/19 degreesC, and the proportion of nonfertilized grains at 35 degreesC/26 degreesC was higher than that at 32C/23 degreesC. The cultivars for which the ratio of grain weight at 35 degreesC/26 degreesC to that at 28 degreesC/19 degreesC was lower than 90% were Moritawase, Arborio as a large grain, and Akenohoshi, which tended to have a bad ripening performance. In contrast, the cultivars with a ratio higher than 95% were Koganemasari, Lakhi Jhota as a small grain, and Hoshiyutaka, known as a good ripened cultivar.