六种阔叶树叶片解剖结构特征及其耐旱性比较

Comparison on leaf anatomical structures and drought resistance of six broad-leaved plant species

以元宝枫、山桃、皂荚、黄栌、迎春、南蛇藤等6种阔叶树为研究对象,对各种类叶片的主要解剖构造特征进行观察和测定,并综合分析它们在控制水分上的能力。结果表明,不同树种控制水分的主要解剖特征各异;应用模糊数学分析,选择角质层厚度、栅/海比值、上、下表皮厚度、气孔的长度等5个指标进行综合评价,6种阔叶树叶片解剖构造在耐旱性上的能力大小排序为:元宝枫>黄栌>山桃>皂荚>南蛇藤>迎春。

Acer truncatum , Prunus davidiana , Gleditsia sinensis, Cotinus coggygria , Jasminum nudi florum and Celastrus orbiculatus were selected on the campus of the Beijing Forestry University to compare the mainly leaf anatomical structure characters and analyze their ability in water loss controlling. The results showed that the mainly leaf anatomical structure characters in controlling water loss were different. By using fuzzy cluster analysis, the ability in controlling water loss of the six species in the thickness of cuticle, the thickness of upper and lower epidermis, ratio of palisade tissue to sponge tissue,and length of stoma were selected to comprehensively evaluation. The order of their drought resistance ability is .A. truncatum〉C, coggygria〉 P. davidiana〉G, sinensis〉C, orbiculatus〉 J. nudi florun.