红树植物白骨壤叶片的解剖结构及其生态适应性

Leaf structure of Avicennia marina and its ecological adaptability

运用石蜡切片的方法对红树植物白骨壤的叶片进行解剖学的观察和研究。结果表明:白骨壤的叶为异面叶;上表皮为复表皮,有厚的角质膜及下皮层;下表皮上有大量的泌盐腺毛;栅栏组织多层,约占叶肉组织的2/3,海绵组织退化;机械组织和输导组织均很发达。反映了白骨壤叶片的结构与其生活的海生环境高度相适应。

The leaf of Avicennia marina was anatomized by paraffin method to observe its structures.The results showed that the leaf of A.marina is bifacial leaf.It has multiple upper epidermis with thick horny membranes and hypodermis.There are many salt-secreting glandular hairs on the lower epidermis,and many layers of palisade tissues which account for about 2/3 in the mesophyll tissues.The spongy tissues are degraded.Both conducting tissues and spongy tissues are highly developed.These results indicated that the leaf of A.marina is greatly adapted to the salty habitats around the sea.