ENVIRONMENTAL-FACTORS CONTROLLING THE TIME OF FLOWER-OPENING IN PHARBITIS-NIL

被引:20
作者
KAIHARA, S
TAKIMOTO, A
机构
[1] Laboratory of Applied Botany, Faculty of Agriculture, Kyoto University
关键词
Circadian rhythm; Flower-opening; Pharbitis; Photoperiod;
D O I
10.1093/oxfordjournals.pcp.a075969
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Pharbitis nil, strain Violet, subjected to various photoperiods (24-hr cycle at 24°C) bloomed about 10 hr after light-off when the light period was 10 hr or longer, and about 20 hr after light-on when the light period was shorter. The higher the temperature (20-30°C) during the dark period, the later the time of flower-opening, with the temperature during the last half of the dark period having a stronger effect than that during the first half.In continuous dark or light, flower buds of Pharbitis opened about every 24 hr at all temperatures tested between 20 and 28°C, which suggests the participation of a circadian rhythm in determining the time of flower-opening. A light pulse given 6-12 or 28-36 hr after the onset of the dark period greatly advanced the phase of this rhythm (8-10 hr). Phase delay of this rhythm could not be obtained by light pulses given at any time. © 1979 Oxford University Press.
引用
收藏
页码:1659 / 1666
页数:8
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