草地学报 ›› 2022, Vol. 30 ›› Issue (5): 1150-1158.DOI: 10.11733/j.issn.1007-0435.2022.05.015

• 研究论文 • 上一篇    下一篇

白刺叶片解剖结构性状异速生长与生态适应性研究

任尚福1,2   

  1. 1. 喀什大学生命与地理科学学院, 新疆 喀什 844000;
    2. 新疆帕米尔高原生物资源与生态重点实验室, 新疆 喀什 844000
  • 收稿日期:2021-10-19 修回日期:2021-11-10 出版日期:2022-05-15 发布日期:2022-06-06
  • 作者简介:任尚福(1973-),男,汉族,山东泰安人,博士,副教授,主要从事逆境植物生理学研究,E-mail:renshangfu@163.com

Allometric Growth and Ecological Adaptability of the Leaf Anatomical Structure of Nitrariaspp.

REN Shang-fu1,2   

  1. 1. College of Life and Geographic Sciences, Kashi University, Kashi, Xinjiang 844000, China;
    2. Key Laboratory of Biological Resources and Ecology of Pamirs Plateau in Xinjiang Uygur Autonomous Region, Kashi, Xinjiang 844000, China
  • Received:2021-10-19 Revised:2021-11-10 Online:2022-05-15 Published:2022-06-06

摘要: 本实验以不同生境下3种白刺(西伯利亚白刺、大果白刺、唐古特白刺)叶片为研究对象,测量3种白刺的叶片解剖结构中叶片厚度、上角质层厚度、上表皮厚度、栅栏组织厚度、海绵组织厚度、下表皮厚度和下角质层厚度等性状指标,用经典异速方程(Y=βXα)描述叶片解剖性状之间的关系。结果表明:不同生境的白刺叶片解剖性状均有显著性差异(P<0.05),均呈显著性幂指数异速生长关系,其异速系数表现显著性差异(P<0.05),其异速指数表现出两类完全不同的规律,一类是≈1,另一类是<1,存在着资源分配的权衡。不同生境白刺叶片解剖性状的变异系数在0.10~0.45之间,属于相对稳定的系统演替性状。植物生境中的海拔高度、年降水量与年蒸发量是影响叶片性状的主要因素,3种白刺通过长期的外界异质性的环境因子驱动改变叶片结构性状,可以使其在不同的生境下朝着最适的异速生长曲线进化。

关键词: 白刺叶片, 解剖结构, 异速生长, 生态适应性

Abstract: In this experiment,the leaves of three species of Nitraria (Nitraria sibirica Pall.,N. roborowskii Kom.,N. tangutorum Bobr.) in different habitats were taken as the research objects. The leaf thickness,upper cuticle thickness,upper epidermis thickness,palisade tissue thickness,spongy tissue thickness,lower epidermis thickness and lower cuticle thickness in the leaf anatomical structure of three species of Nitrariain different habitats were measured. The relationship between leaf anatomical traits was described by the classical allometry equation (Y=βXα). The results showed that there were significant differences in anatomical traits of leaves in different habitats (P<0.05),and they all showed a significant exponential allometric growth relationship. The allometric coefficient lgβ showed significant differences (P<0.05). The allometric index showed two completely different patterns,one was ≈1,and the other was <1. There was a trade-off between resource allocation. The coefficient of variation of leaf anatomical traits in different habitats ranged from 0.10 to 0.45,belonging to relatively stable systematic succession traits. Altitude,annual precipitation and annual evaporation are the main factors affecting leaf traits in plant habitats. Three Nitraria change leaf structural traits through long-term external heterogeneity of environmental factors,which can make them evolve towards the optimal allometric growth curve in different habitats.

Key words: Nitraria spp. leaf, Anatomical structure, Allometry growth, Ecological adaptability

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