Effect of Air Temperature on Floral Induction by Short Day in Rice Plants
Effect of Air Temperature on Floral Induction by Short Day in Rice Plants
复制标题
气温对水稻短日照开花诱导的影响
DOI：
10.1626/jcs.52.135
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发表时间：
1983
影响因子：
--
通讯作者：
S. Yoshida
中科院分区：
文献类型：
--
作者：
Yukio Haniu;H. Chujo;S. Yoshida
以日长敏感品种瑞禾为材料，研究了短日照处理下不同温度对水稻成花诱导的影响。12~14叶期的植株在自然光照的生长箱中，在不同的气温下接受10小时的光周期。所得结果总结如下。1.在12 ° C、16 ° C、20 ° C、25 ° C、30 ° C、35 ° C和40 ° C的各种恒定温度下，使植物经历10小时的光周期。短日效应在30 ° C时最大，并随着温度从最佳温度30 ° C的升高或降低而降低（图1）。短日照处理在12 ° C或40 ° C下没有效果。短日照诱导的最适温度略低于出叶温度。2.使植物在16 ° C至40 ° C的光周期温度和12 ° C至35 ° C的暗周期温度下经历10小时的光周期（表1）。光照期和黑暗期的最适温度均为30 ° C，但黑暗期25 ° C的效果与30 ° C相同（表1、表2、图3）。当温度低于或高于最适温度时，短日效应减弱。除温度高于30 ° C外，光周期温度引起的短日效应差异与暗周期温度引起的短日效应差异几乎相同（表3）。当光照期和黑暗期之间的温度范围为5 ° C时，短日照的影响与两个时期内恒温的影响几乎相同（图4）。当范围大于10 ° C时，获得较小的影响。
Experiments were conducted to make clear the differences of floral induction in rice plants as affected by air temperature during short day treatment, using a daylength-sensitive variety "Zuiho". The plants of 12∼14 leaf stages were subjected to 10-hour photoperiod under various air temperatures in growth cabinets with natural light. The results obtained are summarized as follows. 1. The plants were subjected to 10-hour photoperiod under various constant temperatures; 12°, 16°, 20°, 25°, 30°, 35° and 40°C. The short day effect was largest at 30°C, and decreased with rising or falling of temperature from the optimum, 30°C(Fig. 1). Short day treatments gave no effect at 12°C or 40°C. The optimum temperature for the short day induction was somewhat lower than that for leaf emergence (Fig. 2). 2. The plants were subjected to 10-hour photoperiod under lightperiod temperature from 16°C to 40°C and darkperiod temperature from 12°C to 35°C (Table 1). Both the optimum temperature for lighperiod and darkperiod were 30°C although 25°C during the darkperiod gave the same effect as 30°C (Table 1, Table 2, Fig. 3). Short day effect decreased when the temperature was lower or higher than the optimum one. Differences in short day effect due to lightperiod temperatures were almost the same as those due to darkperiod temperatures with the exception of temperatures higher than 30°C (Table 3). When the range of temperature between the light- and darkperiod was 5°C, the effect of short day was almost the same as that under constant temperature throughout the both periods (Fig. 4). A smaller effect was obtained when the range was larger than 10°C.