Welcome to Journal of Agriculture,

Journal of Agriculture ›› 2023, Vol. 13 ›› Issue (9): 46-53.doi: 10.11923/j.issn.2095-4050.cjas2022-0116

Special Issue: 生物技术

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Impacts of Varying Habitats on the External Morphological Structure of Ageratina adenophora Leaves

YANG Nanxi1(), LIU Xianbin1,2(), ZHAO Xingshuo1, DONG Han1   

  1. 1 School of Chemistry, Biology and Environment, Yuxi Normal University, Yuxi 653100, Yunnan, China
    2 Institute of Biology and Environmental Engineering, Yuxi Normal University, Yuxi 653100, Yunnan, China
  • Received:2022-08-22 Revised:2023-03-06 Online:2023-09-20 Published:2023-09-13

Abstract:

To investigate the external morphological structure of Ageratina adenophora leaves in various habitats, the key environmental factors controlling different external morphological structure of A. adenophora leaves were analyzed and discussed. This project was carried out in the campus of Yuxi Normal University of Yunnan Province. 10 local common habitats were selected to investigate the length, width, ratio of length to width, leaf area, number and proportion of serrations on both sides of the leaf edge of A. adenophora in each habitat, and to analyze the impacts of different environmental factors as well as their combinations on the external morphological structure of A. adenophora leaves. The study results showed that the three groups of data including leaf length, width and leaf area of A. adenophora obviously changed among the 10 selected habitats, and their change patterns were also consistent; the order from large to small was: artificial cultivation (shade) > farmland ≈ artificial cultivation (full light) ≈ pond side (wet) > farmland ridge ≈ forest gap > forest shade > road edge (shade) ≈ pond side (dry) > road edge (full light). There was no significant difference in the ratio of leaf length to width among the 10 selected habitats, which was about 1.35; the numbers of serrations on both sides of the leaf edge were both about 12 in the 10 habitats, and the ratio of serrations on both sides was about 1.00. The analysis results of the investigation data also fully proved that the impacts of light intensity, soil moisture and nutrient content as well as the interactions of the three environmental factors on the length, width and leaf area of A. adenophora reached an extremely significant level, but the effects on the shape of leaves and the number and proportion of serrations on both sides of the leaf edge were apparently weak.

Key words: Ageratina adenophora, leaf, leaf edge, light intensity, soil moisture, soil nutrient content