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Bulletin of Botanical Research ›› 2018, Vol. 38 ›› Issue (6): 876-885.doi: 10.7525/j.issn.1673-5102.2018.06.011

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Wood Ultrastructure Observation of Rubber Tree (Hevea brasiliensis Muell.Arg.) Young Stem

WANG Xiang-Jun1,2, ZENG Xian-Zhen3, WANG Ya-Jie3, HUANG Xiao1,2, ZHANG Yuan-Yuan1,2, LI Wei-Guo1,2   

  1. 1. Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Danzhou 571737;
    2. State Centre for Rubber Breeding, Danzhou 571737;
    3. Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228
  • Received:2018-07-02 Online:2018-11-15 Published:2018-11-01
  • Supported by:
    Earmarked Fund for Modern Agro-Industry Technology Research System(CARS-34-GW1)

Abstract: Rubber tree(Hevea brasiliensis Muell. Arg.) is an important economic crop in China's tropical regions. Rubber wood, a by-product of rubber cultivation, is an important source of timber supply in China. Using scanning electron microscopy, we studied the ultrastructure of xylem cells of rubber tree young stems which develop in different stages. The results showed that in the wood of rubber tree young stem, the cell wall of the vessel and wood fiber were thickened obviously with the development and maturation of the xylem. Spiral thickening was the main thickening method. There were a large number of pits in the cell wall of xylem cells. The main modes of the arrangement of the pits are scattered, reticular, ladder-shaped, and pearl-like. During the development of xylem, starch granules will gradually accumulate in the ray and some parenchyma cells. There are different types of attachments on the surface of xylem cell wall. These results will provide a theoretical reference for the studies of rubber wood property and its formation mechanism.

Key words: Hevea brasiliensis Muell.Arg., wood, ultrastructure, scanning electron microscopy

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