Influence of High Water Temperature on Leaf Growth in Rice Plant (Oryza sativa L.)
Influence of High Water Temperature on Leaf Growth in Rice Plant (Oryza sativa L.)
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高水温对水稻叶片生长的影响
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
O. Sasaki
中科院分区：
文献类型：
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作者：
O. Sasaki
研究了短时间高温（35℃）对水稻未成熟叶片生长响应的影响。试验植株在一个叶龄内（从主茎某片叶子的出芽时间到相邻幼叶的出芽时间）暴露于高温中。对照植株在30°C水温下连续保存。第(n)片叶片（“n”表示从主茎中不完整的叶片向上计算的可选序数）出芽时的高水温分别使第（n+1）片叶片的叶宽减小到（n+3）片叶片，第（n+1）片叶片的叶长减小到（n+3）片叶片，第(n)片叶片的鞘长减小到（n+1）片叶片。高水温对（n+2）叶宽、（n+1）叶长和(n)叶鞘长度的抑制作用最为显著。高水温还使第(n)th叶的总叶长（叶片和鞘长）减小到（n+3）th叶，使第（n+1）th叶的叶面积减小到（n+3）th叶。每个叶片长度对对照地块的抑制比（低于15.6%水平）显著低于每个叶片面积（31.6 ~ 34.3%水平）。高水温对叶片的抑制作用对水稻植株的生长能力造成严重影响。
This study was undertaken to evaluate the effect of short period high water temperature (35°C) on the growth response of immature leaves in rice plants. The test plants was exposed to high water temperature during one phyllochron, from the time of emergence of a given leaf of the main stem to the time of emergence of the adjacent younger leaf. Control plants were kept continuously at 30°C water temperature. High water temperature at the time of emergence of the (n)th leaf ("n" indicates an optional ordinal number of leaves counted acropetally from the incomplete leaf in the main stem) decreased the blade width of (n+1)th to (n+3)th leaves, the blade length of (n+1)th to (n+3)th leaves, and the sheath length of (n)th to (n+1)th leaves, respectively. The restraint effect of high water temperature was most remarkable against the blade width of (n+2)th leaf, the blade length of (n+1)th leaf, and the sheath length of (n)th leaf. High water temperature also decreased the total leaf length(blade and sheath) of (n)th to (n+3)th leaves and the blade area of (n+1)th to (n+3)th leaves. The restraint ratio in each leaf length against the control plot was significantly lower (under 15.6% level) than in each blade area (31.6∼34.3% level). These notable blade restraints caused by high water temperature may impose a serious influence for the growth ability in rice plants.