珍稀植物青檀叶的解剖结构及其生态适应性特征

Study on Anatomical Structure of Leaf and Ecological Adaptability of Pterocektis tartarinowii Maxim

采用石蜡切片法、叶表皮离析法对不同居群青檀叶片的解剖结构进行了对比观察和分析,以期探讨中国特有属植物青檀在解剖结构方面对石灰岩地区贫瘠干旱的适应特征及其机理。结果表明,青檀在叶的解剖结构方面对干旱的石灰岩生境有良好的适应性,其中生境条件最差的巢湖银屏山居群青檀的耐旱性最强,具体表现为:叶片厚,表皮细胞小,具有较厚的表皮细胞外壁和角质层;栅栏组织发达,细胞排列紧密;气孔小且密度大,成簇分布等特征。本研究对青檀在石灰岩地区的推广栽培提供了理论基础。

Pterocektis tartarinowii Maxim is considered an endangered species on the brink of extinction endemic to China, In order to investigate ecological adaptability of P. tartarinowii Maxim, the comparative observation and analysis of anatomical structure of leaf of different populations were demonstrated by the method of slices of paraffin wax and isolation in this paper . The results showed that the anatomical structure of leaves adopt well to the dry and poor limestone area. The drought resistance of P. tartarinowii Maxim from the population of Ying Ping hill in which habitat was the poorest was the strongest. The leaves had xeromorphic characteristics, including thickened leaves, thickened epidermis cell wall and cuticle, well developed palisade tissue, densely arranged cell. Small and dense stomata and distribute in cluster etc. This research is helpful for the application of P. tartarinowii Maxim in limestone area.