典型粳稻植株气孔分布的研究

Observations of the Stomatal Distribution in Typical Japonica

用改良刮制法观测了典型粳稻品种秋光剑叶、叶鞘、穗颈及颖壳的气孔分布情况，结果表明：剑叶背面气孔分布有一定规律性，但此规律性常因气孔行的突然中断被削弱。剑叶背面气孔密度纵向变化呈偏态分布，叶中部气孔密度大于叶基又大于叶尖部；叶中部气孔长度最小，气孔宽度最大。剑叶背面横向气孔密度呈中部最大的正态分布，气孔大小变化不大。叶片边缘气孔行不分组。本研究还发现，中脉和叶鞘上亦有气孔分布，而且中脉上的气孔密度在所测各器官中最大，叶鞘上的气孔密度约为剑叶背面气孔密度的1／3左右。穗颈上有少量气孔分布。

The obervations were made on the stomatal distribution on flag leaf, leaf sheath, neck panicle and glumeof a typica japonica variety-Aklhlkarl through scrape-making methed. The results showed that there were stomaalso in leaf sheath and neck panickle. The stomatal frequency followed an order of flag leaf >leaf sheath>neckpanicle, the leaf mein vein had largest stomtal frequency in all organs; the stomatal frequency of leaf sheath wasone third of the under side of flag leaves; there was very little stome on neck panicle, no stoma was found in theglume. The stomatal length and width of different organs had significant differences, stomatal distribution in all organswas recounted, micrographics were supplied.