SEXUALITY AND CYST FORMATION IN PACIFIC STRAINS OF THE TOXIC D1NOFLAGELLATE GONYAULAX TAMARENSIS 1, 2
SEXUALITY AND CYST FORMATION IN PACIFIC STRAINS OF THE TOXIC D1NOFLAGELLATE GONYAULAX TAMARENSIS 1, 2
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有毒 D1NOFLAGELLATE GONYAULAX TAMARENSIS 1, 2 太平洋菌株的性和囊肿形成
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
F. Taylor
中科院分区：
文献类型：
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作者：
D. Turpin;P. Dobell;F. Taylor
性征已经确立了Gonyaulax tarnarensis Lebour（菌株NEPCC-71）的文化。在无氮培养基中加入较厚的接种物，在新文化的头三天内就会发生异性交配的融合。扁平受精卵是一种巨大的“块状”细胞，可以通过其四个鞭毛辨认出来，在形成光滑的卵形受精卵之前可以持续2周。后者类似于经蜕皮无性释放的囊肿，但壁稍厚。在不列颠哥伦比亚省的Hidden Basin，从天然小鼠沉积物中分离出了类似于催眠合子的活囊（合子囊），但光合色素沉着减少，并从脱落的个体中开始培养（菌株NEPCC-254）。NEPCC-71的合子囊肿在17℃的光照下保持囊泡8周后脱落。后一种菌株中出现了带有毒性的腹侧笔，这表明塔马绦虫样生物的分类仍处于不断变化的状态，并且目前制定的识别G. excavata (Braarud) Balech为单独物种的标准尚不令人满意。
Sexuality has been established for a culture of Gonyaulax tarnarensis Lebour (strain NEPCC–71). The addition of a thick inoculum to a nitrogen–deprived medium results in the occurrence of anisogamous sexual fusion within the first three days in the new culture. Planozygotes, large “lumpy” cells recognizable by their four flagella, may persist up to 2 wk before forming a smooth–walled, oval hypnozygote. The latter resembles cysts released asexually by ecdysis but has a slightly thicker wall. Viable cysts resembling hypnozygotes (zygotic cysts), but with reduced photosynthetic pigmentation, have been isolated from natural murine sediments in Hidden Basin, British Columbia, and a culture (strain NEPCC–254) was initiated from excysted individuals. Zygotic cysts of NEPCC–71 remained encysted in the light at 17 C for 8 wk before excysting. The presence of a ventral pen with toxicity in the latter strain indicates that the taxonomy of G. tamarensis‐like organisms is still in a stale of flux and the criteria for recognition of G. excavata (Braarud) Balech as a separate species are not satisfactory as presently formulated.