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首页> 外文期刊>Harmful Algae >The Germination Characteristics Of Alexandrium Minutum (dinophyceae), A Toxic Dinoflagellate From The Fal Estuary (uk)
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The Germination Characteristics Of Alexandrium Minutum (dinophyceae), A Toxic Dinoflagellate From The Fal Estuary (uk)

机译：Fal河口有毒的鞭毛藻亚历山大草（Dinophyceae）的发芽特性（英国）

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The germination characteristics of Alexandrium minutum cysts from the Fal estuary were studied at different conditions of temperature (4-24 ℃) and salinity (15-35‰) and in the dark and low light intensity (2 μmol~(-2) s~(-1)). Sediment sub-samples were directly cultured and processed at the end of the experiment for counts of non-germinated cysts. A decrease in the number of cysts was interpreted as germination that was calculated by comparison of the number of cysts over time with that of initial counts. The 50% germination time (time at which 50% of the total initial number of cysts had germinated) was calculated for each condition. A minutum did not germinate in the dark but it germinated under all other conditions studied. Highest germination occurred at salinities of 30 psu and 35 psu and temperatures from 8 ℃ to 24 ℃ (germination rate-expressed as the inverse of the 50% germination time: 1.1-1.2). Lowest germination occurred at 15 psu and 4 ℃ and 24 ℃ (germination rate: 3.9-3.8). However, little variation in germination rates occurred across the conditions studied. As these conditions represent those likely in the estuary it is probable that A minutum cysts on the surface of the sediments represent a constant source of cells to the water column and sediment disturbance (revealing buried cysts) could rapidly inoculate the water column with vegetative cells. This data was used to develop a model for Alexandrium germination from coastal sediments.
机译：研究了在不同温度（4-24℃）和盐度（15-35‰）以及在暗光和弱光强度（2μmol〜（-2）s〜）下Fal河口亚历山大草囊肿的发芽特性。 （-1））。在实验结束时，直接对沉积物子样品进行培养并处理未发芽囊肿的计数。囊肿数量的减少被解释为发芽，其通过将囊肿数量随时间的变化与初始计数进行比较而得出。对于每种情况，计算出50％的发芽时间（总的囊肿初始数量的50％发芽的时间）。细小动物不会在黑暗中发芽，但会在所有其他研究条件下发芽。在30 psu和35 psu的盐度和8℃至24℃的温度下，发芽率最高（发芽率表示为50％发芽时间的倒数：1.1-1.2）。最低发芽发生在15 psu，4℃和24℃（发芽率：3.9-3.8）。但是，在所研究的条件下，发芽率几乎没有变化。由于这些条件代表了河口可能发生的情况，因此沉积物表面的微小囊肿很可能是水柱中恒定的细胞来源，而沉积物的干扰（揭示出的隐性囊肿）可能会迅速将营养细胞接种到水柱中。该数据用于建立沿海沉积物亚历山大发芽的模型。

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