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Bulletin of Botanical Research ›› 2009, Vol. 29 ›› Issue (4): 397-401.doi: 10.7525/j.issn.1673-5102.2009.04.003

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Anatomical Structures of Vegetative Organs and Ecological Adaptation of Gaura parviflora

HUANG Ping;SHEN Jun-Hui;GU Dong-Ya;LÜMing-Jin;YE Yong-Zhong*   

  1. (College of Life Science,Henan Agriculure University,Zhengzhou450002)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-07-20 Published:2009-07-20
  • Contact: YE Yong-Zhong
  • Supported by:

Abstract: Gaura parviflora is one of the invasive plants, the anatomical structure of its vegetative organs was studied by the methods of paraffin section. The results showed that: In the secondary structure of the roots of G. parviflora,there was a larger proportion of secondary xylem, about two thirds of the entire cross section, the number of vessels averaged 138.25, and the lumen diameter was 85.37 μm; The cork of the roots and stems were both developed, which was composed of 6 to 7 layers of flat cells; there were many parachyma cells containing needle crystals in the secondary phloem; The leaves of G.parviflora had the typical characteristics of xerophytes leaves: the multiple epidermis; the stomata existed in both upper and lower epidermis,whose densities were 180 mm-2 and 266 mm-2, respectively; the palisade tissue was two-side palisade which included 2 to 3 layers of cylindrical cells in the upper side, with a lot of chloroplasts; the main vein of leaves had well developed xylem ,with a number of radial arranged vessels. The characters mentioned above showed that G.parviflora adapted well to the dry environment.

Key words: Gaura parviflora, paraffin section, anatomical structure

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