EFFECTS OF WIND AND RAIN ON THE FERTILIZATION, KERNEL DEVELOPMENT AND KERNEL CHARACTERS OF RICE PLANT
EFFECTS OF WIND AND RAIN ON THE FERTILIZATION, KERNEL DEVELOPMENT AND KERNEL CHARACTERS OF RICE PLANT
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DOI：
10.1626/jcs.58.555
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发表时间：
1989-12-01
影响因子：
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通讯作者：
ISHIKAWA, M
中科院分区：
文献类型：
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作者：
EBATA, M;ISHIKAWA, M
抽穗后不同阶段的水稻植株 (Oryza soliva L.) 在有或没有人工降雨的情况下用 0 至 15 m/s 的人工风进行处理。超过4m/s的风明显抑制花朵受精。不过，大雨并没有造成太大的伤害。褐色的籽粒是由开花期的风造成的。然而，抽穗后 14-21 天（DAH）的风促进了乳白色籽粒的出现。这些受伤的谷粒随着风力的增强而增加。另一方面，风伴雨对籽粒造成的损伤程度较小。水稻小穗蒸腾速率在抽穗后最高。 7 DAH 左右略有下降，在内核发育中期再次上升，此后下降。高速率蒸腾阶段与最容易受到风害的阶段一致。蒸腾速率随着风速的增加而加快，尤其是在早期阶段。因此可以得出结论，大多数风害似乎主要是由圆锥花序或每个小穗中发生的暂时水分胁迫引发的。人们认为，雨水可以保护小穗免受水分流失，从而有效减少风害。
Rice Plants (Oryza soliva L.) at different stages after heading were treated with artificial winds of 0 to 15 m/s with and without an artificial rain. Flower fertilization was clearly inhibited by winds over 4m/s. Rainy wind, however, did not cause much injury. Brown-discolored kernels were caused by wind at the flowering stage. Occurrence of milky white kernel, however, was promoted by winds at 14-21 days after heading (DAH). These injured kernels increased with strengthened wind. Wind accompanied by rain, on the other hand, caused injured kernels to a lesser extent. Transpiration rate of rice spikelet was highest just after heading. It slightly dropped around 7 DAH and increased again in the mid-stage of kernel development and decreased thereafter. The stages of high rate transpiration coincided with stages most susceptible to wind injury. The rate of transpiration was accelerated with increased wind velocity especially in earlier stages. It is concluded therefore that most of the wind injuries seem to be triggered mainly by a temporary water stress occured in a panicle or in each spikelet. Rain was though to be effective to lessen wind injury through protecting spikelets from their water loss.