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The leaf anatomical structure characteristics of four greening trees from urban in Xi’an under different air environment

  

  1. School of Environmental and Municipal of Engineering, XI’an University of Architecture and Technology, Xi’an, 710055，China
  • Online:2016-02-18 Published:2016-02-18

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Abstract:  

The leaf anatomical structure of four greening plants such as Ligustrum lucidum Ait.，Ligustrum quihoui Carr. , Prunus ceraifera Euonymus japonicas Thunb. were researched by frozen section methods. The leaves were anatomically observed, and indexes including the thickness of upper and lower cuticle, the thickness of epidermal cell, palisade tissue thickness, spongy tissue thickness and leaf thickness were measured. At the same time, the ratio of palisade tissue to spongy tissue(P/S), the ratio of palisade tissue to leaf thickness (CTR), the ratio of spongy tissue to leaf thickness(SR) were statistically analyzed. The results are as follows: (1)Leaf anatomical structure indexes among the sampling points exhibit different degrees of difference, especially the palisade tissue, the leaf thickness and the ratio of palisade tissue to leaf thickness; (2)The Correlation analysis showed that the mesophyll tissue，including palisade tissue and spongy tissue, make a significant contribution to the leaf thickness; It was also indicated that the upper cuticle had a significantly positive correlation with palisade tissue thickness, and a significantly negative correlation with spongy tissue thickness. (3)The P/S have largest coefficient variation and plasticity index among all anatomical structures, which means the P/S is more easily to make changes for environment. The coefficient variation and plasticity index of Prunus cerasifera cv. Pissardii were respectively 21.9% and 1.0218, which is the largest one in four species. It inferred that Prunus cerasifera cv. Pissardii maybe the most variable tree species of those greening plants in different environment.    cv. Pissardii.and

Key words:  , anatomical structure；frozen section；coefficient variation；plasticity index