【摘要】 研究不同遮荫处理对江西遂川两家系东京野茉莉幼苗叶片形态和解剖结构的影响,并与白辛树幼苗对遮荫的响应进行对比分析。结果表明:遮荫处理对3种幼苗叶片的叶面积、比叶重、相对含水量和解剖结构有不同程度的影响。随着遮荫强度的增加,3种幼苗的叶面积总体上都呈逐渐下降的趋势,但不同幼苗之间和不同遮荫处理之间的差异均不显著;随着遮荫强度的增加,东京野茉莉两家系幼苗比叶重均逐渐减少,白辛树在60%遮荫处理下增加,总体上逐渐减小;东京野茉莉两家系叶片相对含水量均在40%遮荫处理下下降,然后逐渐增加,白辛树总体上逐渐增加;随着遮荫强度的增加,3种幼苗叶片厚度下降,栅栏组织细胞相互融合而变粗,长度缩短,排列不整齐,细胞间隙增宽,细胞器数量大量减少。更多还原

【Abstract】 Effects of different shading treatments on leaf morphology and anatomical structure of Styrax tonkinensis seedlings in two families from Suichuan Jiangxi as well as Pterostyrax psilophyllus seedlings were studied.The results showed that shading treatments could affect the leaf area,specific leaf weight and the relative water content of three kinds of seedlings at different degrees.The leaf area of the three kinds of seedlings generally decreased along with the increasing of shading intensity.But it was not significantly different among different kinds of seedlings and shading treatments.The specific leaf weight of Styrax tonkinensis seedlings in the two families gradually decreased along with the increasing of shading intensity,while that of Pterostyrax psilophyllus seedlings decreased along with the increasing of shading intensity except that it increased in the 60% shading treatment.The relative water content of Styrax tonkinensis seedlings in the two families decreased along with the increasing of shading intensity from 0% to 40%,and increased along with increasing of shading intensity from 40% to 80% ;the relative water content of Pterostyrax psilophyllus seedlings gradually increased along with the increasing of shading intensity.With the increasing of shading intensity,the thickness of leaf of the three kinds of seedlings generally decreased,palisade tissue cells became coarse,shorter and untidy through mutual fusion,intercellular space widened,and organelles greatly decreased.更多还原