Centro de Investigaciones Biológicas del Noroeste, S.C. (CIBNOR), Av. I.P.N. 195, Col. Playa Palo de Santa Rita Sur, La Paz, Baja California Sur 23096, Mexico.
Programa Cátedras CONAHCYT, Centro de Investigaciones Biológicas del Noroeste, S.C. (CIBNOR), Av. I.P.N. 195, Col. Playa Palo de Santa Rita Sur, La Paz, Baja California Sur 23096, Mexico.
Mar Pollut Bull. 2024 Jan;198:115802. doi: 10.1016/j.marpolbul.2023.115802. Epub 2023 Nov 22.
Alexandrium tamiyavanichii is a marine dinoflagellate known to produce Paralytic Shellfish Poisoning (PSP) toxin. Thus, a strain was isolated from La Paz Bay, Baja California Sur, Mexico and used to explore whether stress conditions, such as phosphorus limitation (PL) and nitrogen enrichment (NE) modulate population growth and PSP toxin production in the GSe medium. Growth kinetics showed that the PL treatment produced a 3.4-fold increase in cell density versus control at day 30 of the culture cycle. The highest PSP concentration was found in the control culture (309 fmol cell) on day 21. Saxitoxin (STX) was the main analog in all the treatments (> 40 % mol). In conclusion, PL and NE treatments promoted growth kinetics in the species studied but did not affect the PSP toxin production. For the first time, the present research describes A. tamiyavanichii high toxicity strain isolated from Mexican coasts relative to the South-Atlantic strains.
塔玛亚历山大藻是一种海洋甲藻，已知会产生麻痹性贝类毒素（PSP）。因此，从墨西哥南下加利福尼亚州拉巴斯湾分离出一株，并用于研究应激条件（如磷限制（PL）和氮富集（NE））是否会调节 GSe 培养基中的种群生长和 PSP 毒素的产生。生长动力学研究表明，在培养周期的第 30 天，PL 处理使细胞密度比对照增加了 3.4 倍。在第 21 天，对照组的 PSP 浓度最高（309 飞摩尔细胞）。所有处理中，石房蛤毒素（STX）都是主要的类似物（>40%mol）。总之，PL 和 NE 处理促进了所研究物种的生长动力学，但并未影响 PSP 毒素的产生。本研究首次描述了从墨西哥海岸分离出的塔玛亚历山大藻高毒性株，与南大西洋株相比。
