摘要
应用光学显微镜和扫描电镜研究了ＣＯ２ 浓度对大豆（Ｇｌｙｃｉｎｅ ｍ ａｘ）叶片形态和解剖特征的影响。结果表明，叶片外部形态没有显著变化，而叶片气孔密度随ＣＯ２ 浓度升高呈下降趋势。对照组叶片上下表面和处理组的上表面均无表面角质蜡层，而处理组的下表面覆盖有大量星状的表面角质蜡层，它们在气孔区和非气孔区的数量基本差不多。此外，还发现叶肉中增加了一层栅栏组织，从而使叶片明显增厚。结果证实，ＣＯ２
The effects of CO 2 concentration on the morphological and anatomical characters of soybean (Glycine max) leaf were investigated by means of light microscopy and SEM.It was noticed that exomorphology did not show dramatic change,while stomatal density decreased with increasing CO 2 concentration.Under SEM,no epicuticular wax was observed on both abaxial and adaxial sides of the control group as well as on adaxial side of the treatment group.However,leaf surface of abaxial side was noticed to be densely covered with microasterisk epicuticular wax when they were exposed to CO 2 enriched environment.The epicuticular wax deposition was present in equal abundance on both stomatal and nonstomatal areas.Furthermore,leaf thickness increased significantly due largely to the origin of an extra layer of palisade in the treatment group.The results confirmed that CO 2 enrichment might enhance cell division and induce greater quantity of epicuticular wax.
基金
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关键词
大豆
叶片结构
CO2浓度
Soybean
Foliar structure
CO 2 concentration
