title: Ultrastructure and cytochemical localization of acid phosphatase of laticifers in Euphorbia kansui Liou.
abstract: Acid phosphatase (AcPase) activities are involved in the degeneration process of cytoplasm in plants. In this study, acid phosphatase was detected by the method of lead nitrate and cytochemical electron microscopy during the development of nonarticulated laticifers in Euphorbia kansui Liou. The most important feature in the differentiation of the laticifers in E. kansui is that the development of small vacuoles arises from endoplasmic reticulum (ER). The mature laticifers possess a thin layer of electron-dense peripheral cytoplasm in which the organelle cannot be distinguished and a large central vacuole filled with latex particles. AcPase cytochemistry studies show AcPase reaction products congregated into heaps are distributed along the tonoplast of central vacuole and around the mitochondria and plastids. Some small vacuoles which develop at later developmental stages of laticifers contain AcPase reaction products. As a result, the central vacuole is formed by cellular autophagy and fusion of small vacuoles which apparently arises from ER.
authors: Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi'an 710069, China. caix@nwu.edu.cn
authors: Xia
authors: X
authors: Cai
authors: Wei
authors: W
authors: Li
authors: Lingfang
authors: L
authors: Yin
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism*; D028481:Euphorbia / Q000201:enzymology* / Q000648:ultrastructure*; D046529:Microscopy, Electron, Transmission; D018514:Plant Structures / Q000201:enzymology / Q000648:ultrastructure
chemical_list: D000135:Acid Phosphatase