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  • ISSN 1000-694X
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Comparison of Growth and Leaf Morphological Characters of Sand-cultivated Shoots of Syntrichia caninervis Sampled from Two Different Microhabitats

  • Xu Hongmei ,
  • Yin Benfeng ,
  • Li jin ,
  • Zhang Yuanming
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  • 1. Key Laboratory of Species Diversity Application and Control in Xinjiang/College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China;
    2. Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2014-09-06

  Revised date: 2014-12-09

  Online published: 2015-03-20

Abstract

Syntrichia caninervis is the dominant species of moss crusts in the Gurbantunggut Desert, the largest fixed and semi-fixed desert in northwestern China. This species has a strong ability of desiccation-tolerant, making them the artificial cultivation sample used for fixing sand. However, the differences in growth and leaf morphological characters of sand-cultivated shoots of S. caninervis sampled from different microhabitats are poorly studied. In this study, the fragments of S. caninervis shoots collected from two different microhabitats including under shrub canopy (understory) and exposed spaces between shrubs (exposed intershrub) were separately cultivated on the same sand medium under laboratory conditions for fifty days. Growth parameters (coverage, density and shoot height) and leaf morphological characteristics (leaf width, leaf length, midrib width and leaf hair point length) of the seedlings were measured and compared. Results showed that: (1) there existed significant differences of shoot coverage and density between the two sampling microhabitats, but no significant difference was found on the shoots height or the biomass. Compared to the sand-cultural seedlings from understory, the value of shoots coverage, density and biomass of cultivated shoots from intershrub were higher, while the shoot height showed the opposite results. (2) There were significant differences among sand-cultural seedlings from different microhabitat in leaf width from middle and bottom of shoots, as well as the leaf hair point length from top of shoots. However, no obvious morphological differences in leaf length and midrib width were observed. The leaf width of middle and bottom sand-cultural seedlings from exposed intershrub were wider than those from understory, and the leaf hair point length also showed the same result. All the results indicated that the sand-cultured seedlings from exposed intershrub performed a better adaptation to extreme arid environment than those from understory after sand cultivation.

Cite this article

Xu Hongmei , Yin Benfeng , Li jin , Zhang Yuanming . Comparison of Growth and Leaf Morphological Characters of Sand-cultivated Shoots of Syntrichia caninervis Sampled from Two Different Microhabitats[J]. Journal of Desert Research, 2015 , 35(2) : 373 -379 . DOI: 10.7522/j.issn.1000-694X.2014.00197

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