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DOMOIC ACID PRODUCTION IN NITZSCHIA SP. (BACILLARIOPHYCEAE) ISOLATED FROM A SHRIMP‐CULTURE POND IN DO SON, VIETNAM
Author(s) -
Kotaki Yuichi,
Koike Kazuhiko,
Yoshida Makoto,
Van Thuoc Chu,
Huyen Nguyen Thi Minh,
Hoi Nguyen Chu,
Fukuyo Yasuwo,
Kodama Masaaki
Publication year - 2000
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 - 10.1046/j.1529-8817.2000.99209.x
Subject(s) - biology , diatom , domoic acid , axenic , nitzschia , shrimp , botany , phytoplankton , ecology , bacteria , microbiology and biotechnology , nutrient , genetics , toxin
Domoic acid (DA), a neuroexcitatory amino acid, was detected in batch culture of the newly recognized species Nitzschia navis‐varingica Lundholm et Moestrup . The production of DA by this diatom was confirmed by electrospray ionization mass spectrometry. The diatom was collected from a shrimp‐culture pond in Do Son, Vietnam. The production of DA (1.7 pg·cell − 1 ) is within the levels reported for Pseudo‐nitzschia multiseries (Hasle) Hasle. The DA production started during the late exponential growth phase and reached a maximum during the early stationary growth phase. Maximum DA levels in the axenic culture decreased to about half that of the nonaxenic culture (0.9 pg·cell − 1 vs. 1.7 pg·cell − 1 ), suggesting that DA production by the new species is influenced by bacteria.