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  • ISSN 1000-694X
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Evaluation on Drought-resistant Characteristics of Ten Caragana Species Based on Leaf Micromorphological Structure

  • Li Mengmeng ,
  • Liu Dan ,
  • Liu Yubing
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  • 1. Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province/Shapotou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2015-12-01

  Revised date: 2016-01-26

  Online published: 2016-05-20

Abstract

Leaves of ten Caragana species were collected from desert region of northwest China. The leaf cross-section and epidermal micromorphology were observed by light microscope and scanning electron microscope, respectively. Ten micromorphological and structural characteristics were selected to investigate the adaptive ability of drought environment, including blade thickness, stomata density, trichome coverage, cuticular layer thickness and other six leaf xeromorphic structure indices. The results showed that leaf epidermal micromorphology and mesophyll structure had significant adaptation to their habitats. Ten Caragana species were classified into three groups by hierarchical cluster analysis. The first group has higher stomata, blade and epidermal cell thickness, smaller trichome coverage and ratio of palisade to blade. The second has higher trichome coverage, smaller palisade and ratio of palisade to blade. The third has higher palisade and ratio of palisade to blade, smaller stomata, cuticle, blade and epidermal cell thickness. According to the subordinate function values, drought-resistance ability of ten Caragana species was as the follows: C. ordosica>C. roborvskyi>C. brachypoda>C. stenophylla>C. korshinskii>C. microphylla>C. intermedia>C. rosea>C. jubata>C. acanthophylla.

Cite this article

Li Mengmeng , Liu Dan , Liu Yubing . Evaluation on Drought-resistant Characteristics of Ten Caragana Species Based on Leaf Micromorphological Structure[J]. Journal of Desert Research, 2016 , 36(3) : 708 -717 . DOI: 10.7522/j.issn.1000-694X.2015.00203

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