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Plant Diversity ›› 1997, Vol. 19 ›› Issue (04): 1-3.

• 研究论文 •    

降香黄檀次生韧皮部薄壁组织细胞液泡蛋白质的形成和积累的超微结构研究

吴继林;郝秉中;谭海燕   

  1. 中国热带农业科学院、农业部热带作物栽培生理学重点开放实验室,儋州571737
  • 出版日期:1997-08-25 发布日期:1997-08-25

ULTRASTRUCTURAL ASPECTS OF FORMATION AND ACCUMULATION OF VACUOLE PROTEINS IN PARENCHYMA CELLS OF SECONDARY PHLOEM OF DALBERGIA ODORIFERA

Wu Jilin, Hao Bingzhong, Tan Haiyan   

  1. Key Laboratory of Ministry of Agriculture For Tropical Crop Physiology,Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737
  • Online:1997-08-25 Published:1997-08-25

摘要: 热带豆科树木降香黄檀(Dalbergia odorifera)落叶时期末端小枝次生韧皮部薄壁组织细胞的中央液泡中有大量的贮藏蛋白质。用透射电镜技术研究了这些蛋白质的形成和积累。在这些细胞的周缘细胞质中有丰富的游离核糖体和许多粗糙内质网(RER)。在这些核糖体之间,总是散着纤维状物质,有时还出现一些类似液泡蛋白质的结构。常常看到与RER相连的含有稀疏纤维状物质的小泡,以及含有类似液泡蛋白质的形状不规则的小泡和含有更多类似液泡蛋白质的光滑小泡。从连接RER的小泡到形状不规则小泡,再到光滑小泡,可能存在个体发生的连续性。通过内吞作用细胞质中的纤维状物质和核糖体以及其它结构被并入上述3种小泡。光滑小泡通常与中央液泡的膜融合而释放其内含物到液泡中。

关键词: 营养器官贮藏蛋白质, 液泡, 韧皮部, 降香黄檀

Abstract: In the leaf-falling period of Dalbergia odorifera, a tropical tree of legune, massive stor-age proteins were found in the central vacuoles of the parenchyma cells in the secondary phloem of the terminal branchlets. The formation and accumulation of the vacuole proteins was observed us-ing transmission electron microscopy. In the peripheral cytoplasm of the cells, there were plenty of free ribosomes and much rough endoplasmic reticulum (RER). Among the ribosomes, fibril-like materials always dispersed and the structures sometimes appeared which seemed to be the aggregations of the fibril-like materials and to be identical with the vacuole proteins on ultrastructural morphology.。

Key words: Vegetative storage protein, Phloem, Dalbergia odorifera