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THE OOGONIA OF MACROALGA UNDARIA PINNATIFIDA ARE ALKALINE‐PHOSPHATASE POSITIVE AND CONTAIN GERMINAL BODY‐LIKE STRUCTURES 1
Author(s) -
Alexandrova Ya N.,
Reunov A. A.
Publication year - 2008
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.2008.00514.x
Subject(s) - biology , gamete , cytoplasm , gametophyte , alkaline phosphatase , organelle , botany , gametogenesis , microbiology and biotechnology , biochemistry , enzyme , embryo , embryogenesis , pollen , sperm
It was observed that in the female gametophyte of Undaria pinnatifida (Harv.) Suringar (Phaeophyta, Laminariales) gametangial initials and maturing oogonia demonstrated different levels of alkaline‐phosphatase activity (APA). The oogonia exhibited a higher level of APA than in its initials. Electron‐dense granular ovoid structures ∼0.5–0.6 μm were present in the cytoplasm of oogonia. These inclusions were not membrane bound and do not appear to be associated with any particular organelles. The number of the inclusions was 1 to 2 in a single section of the cell. In essential details, the specific APA and subcellular germinal body‐like structure of the developing female gamete in U. pinnatifida were very similar to those in metazoan oocytes.