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