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ULTRASTRUCTURAL STUDIES IN THE BROWN ALGA ECTOCARPUS IN CULTURE: AUTOLYSIS *
Author(s) -
OLIVEIRA LUIS,
BISALPUTRA THANA
Publication year - 1977
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1977.tb01552.x
Subject(s) - autolysis (biology) , endoplasmic reticulum , plasmodesma , cytoplasm , ultrastructure , golgi apparatus , organelle , plastid , acid phosphatase , cell wall , biology , microbiology and biotechnology , mitochondrion , biochemistry , botany , chloroplast , enzyme , gene
SUMMARY During autolysis of senescent cells of the brown alga Ectocarpus the disintegration of nuclei, endoplasmic reticulum, and Golgi apparatus is completed. Degenerating mitochondria and plastids remain as the only recognizable organelles. Results from ultrastructural study in correlation with cytochemical localization of acid phosphatase indicate that lysosomal compartmentation no longer exists because the acid phosphatase reaction becomes distributed throughout the remainder of the cytoplasm and is also shown by the disintegrating plasmodesmata. Aspects of cell wall breakdown are described and related to knowledge of the chemistry of the cell wall.