工厂化棉苗与营养钵棉苗的形态及叶片解剖特征比较

为明确工厂化棉苗抗逆性形成的生理基础,通过表型观察与石蜡切片分析,比较了工厂化棉苗与营养钵棉苗的形态及叶片解剖特征差异。形态特征比较发现,与营养钵棉苗相比,工厂化棉苗表现为叶片边缘上凹、叶片厚度增加、苗高和叶鲜质量显著降低、根叶比增加143.8%;叶片气孔及解剖特征比较发现,工厂化棉苗的栅栏组织与海绵组织极显著加厚,气孔密度和气孔指数较营养钵棉苗分别增加63.3%和40.8%。结果表明,工厂化棉苗较强的抗逆性与其较高的根叶比、叶片厚度、叶鲜质量、气孔密度、栅栏组织厚度高度相关。

Comparision of Morphology and Leaf Anatomical Feature between Cotton Industrial Seedling and Seedling of Nutritional Bowl

To investigate the physiological basis of stress resistance in industrial cotton seedling,this study compared its morphology and leaf anatomical property with those of nutritional bowl cotton seedling by phenotype observation and paraffin section.Morphological comparison found that compared with nutritional bowl cotton seedling,the industrial cotton seedling showed a concave at the edge of the blade,as well as an increase in blade thickness.Besides,its seedling height and leaf fresh weight significantly reduced,and the root and leaf ratio increased by 143.8%.Stomata and anatomical characteristics comparison also found that its palisade tissue and spongy tissue thickened significantly,and stomatal density and stomatal index increased by 63.3% and 40.8%,respectively.Results indicated that the strong stress resistance of industrial cotton seedling was related to its higher root/shoot ratio,leaf sickness,leaf fresh weight,stomatic density,and thickness of palisade tissue.