Plant Diversity ›› 2012, Vol. 34 ›› Issue (3): 248-256.DOI: 10.3724/SP.J.1143.2012.11184

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Features of Leaf Appendages of Bretschneidera sinensis in Different Development Stages

TU  Qiang-1, WU  Tao-2, ZHAO  Liang-Cheng-1**, LIU  Yu-Cheng-2, LIU  Ren-Lin-3, ZHANG  Zhi-Xiang-1   

  1. 1 Laboratory of Systematic Evolution and Biogeography of Woody Plants, College of Biological Sciences and Biotechnology,
    Beijing Forestry University, Beijing 100083, China; 2 College of Forestry, Beijing Forestry University, Beijing 100083, China;
    3 College of Life and Environmental Sciences, Gannan Normal University, Ganzhou 341000, China
  • Received:2011-12-14 Online:2012-06-25 Published:2012-03-12


Leaf appendages (trichome, cuticle, papillae, stomatal apparatus) of Bretschneidera sinensis in different development stages were observed by paraffin section and scanning electron microscopy (SEM). The results showed that there were epidermal trichomes composed of one or several cells in a row on both leaf epiderms and veins. The density of the trichomes decreased with leaf development. The upper epiderm was covered with striated cuticles. The lower epiderm was covered with flowerlike papillae and the density also decreased with the development of leaf. The stomatal apparatus were anomocytic and found only on lower epidermis. By possessing similar papillae, combined with morphological, anatomical and molecular evidence, the close relationship between Bretschneidera sinensis and Akaniaceae was inferred. The characters of leaf appendages of Bretschneidera sinensis reflect its longterm adaption to environment.

Key words: Bretschneidera sinensis, Leaf appendages, Akaniaceae Sapindaceae

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