百合切花不同部位表皮形态差异比较

Microscopic Observations on the Cuticle of the Aerial Tissues of Cut Lily Flowers

以百合‘黄天霸’和‘罗宾娜’为试材,采用光镜和扫描电镜观察方法,研究了2个百合品种的花瓣、花萼、茎、叶片对表皮细胞及气孔形态和最小水分散失速率的影响,以期为百合切花不同品种、不同部位表皮形态及其水分散失速率间的差异提供参考依据。结果表明:相同品种不同部位间表皮形态、最小水分散失速率具有明显差异,但2个品种相同部位间几乎无明显差异。百合花瓣和花萼上表皮细胞呈短圆形,其它部位均呈近似长方形,且叶片上下表皮细胞垂周壁呈明显波纹状。除百合‘黄天霸’和‘罗宾娜’花瓣下表皮和叶片上表皮未发现气孔分布外,其它部位均有气孔分布,其中叶片下表皮上气孔分布密度、气孔面积和相对气孔面积均最大。花瓣的最小水分散失速率高于叶片,但不同品种相同部位的最小水分散失速率无显著差异。

Taking lily‘Huang tianba'and‘Luobinna'as test materials,the effects of petals,calyx,stems and leaves on the morphology of epidermal cells,stomata and minimum water loss rate of two lily varieties were studied by using light and scanning electron microscopy observation methods,in order to provide reference for the difference of skin morphology and water loss rate among different varieties and parts of lily cut flowers.The results showed that there were significant differences in cuticular morphology and minimum water loss rates between different parts of the same variety,but almost no significant differences between the same parts of two varieties.The upper epidermal cells of petals and calyx were short and rounded,while that of the rest parts were approximately rectangular.In addition,the anticlinal wall of upper and lower epidermal cells of leaves were distinctly corrugated.Stomata were found on all parts except the lower cuticle of the petals and the upper cuticle of the leaf of‘Huang tianba'and‘Luobinna'.The density of stomata,stomatal area and relative stomatal area were the greatest on the lower cuticle of the leaf.The minimum water loss rate of petals was higher than leaves,but there was no significant difference in the same parts between two varieties.