SEXUAL REPRODUCTION IN THE TOXIC DINOFLAGELLATE GONYAULAX MONILATA 1
SEXUAL REPRODUCTION IN THE TOXIC DINOFLAGELLATE GONYAULAX MONILATA 1
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有毒甲藻 Gonyaulax monilata 的有性繁殖 1
DOI：
10.1111/j.0022-3646.1979.00312.x
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
K. Steidinger
中科院分区：
文献类型：
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作者：
L. M. Walker;K. Steidinger
在静止培养和缺氮培养基中观察了串珠膝沟藻（Gonyaulax monilata豪厄尔）的性周期。有甲的同花受精的配子以一种特有的方式与扣带成斜角融合。核融合稍微落后于细胞质融合。受精卵发育几天后开始变大。深色双鞭毛的平合子在1-3周内包囊。早期的休眠合子是圆形到卵圆形，含有脂质和一个或两个大的金黄色小球。当休眠合子成熟时，小球变小，细胞质变暗并脱离细胞壁。所有检查的囊肿都只含有一个细胞核。一个非常暗的单核后催眠合子细胞通过古孔逃逸，并在24小时内分裂成子细胞，子细胞在24-48小时内分裂形成一个小链。厚壁zygates在文化的生产意味着，这种休息阶段在海洋沉积物中可以作为源股票的水华。该物种会引起有毒赤潮，而由休眠合子组成的底栖“种子床”的存在现在似乎是合理的。
The sexual cycle of Gonyaulax monilata Howell was observed in stationary cultures and in nitrogen‐deficient medium. The armored, isogamous gametes fuse in a characteristic manner with cingula at oblique angles. Nuclear fusion lags slightly behind cytoplasmic fusion. The zygote enlarges for several days. The dark, double‐flagellated planozygote encysts within 1–3 wk. Early hypnozygotes are round to ovoid and contain lipid and one or two large golden‐yellow globules. As the hypnozygote matures, the globules become smaller and the cytoplasm darkens and pulls from the wall. All cysts examined contained only one nucleus. A very dark, uninucleate post‐hypnozygotic cell escapes through an archeopyle and within 24 h divides into daughter cells which divide in 24–48 h forming a small chain. The production of thick walled zygates in culture implies that such resting stages in marine sediments could serve as a source stock for blooms. This species causes toxic red tides and the existence of benthic “seed beds” consisting of hypnozygotes is now plausible.