Cryptic planktonic diatom challenges phytoplankton ecologists
Cryptic planktonic diatom challenges phytoplankton ecologists
复制标题
隐秘浮游硅藻对浮游植物生态学家提出了挑战
DOI：
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发表时间：
2011
影响因子：
11.1
通讯作者：
T. Smayda
中科院分区：
文献类型：
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作者：
T. Smayda
浮游硅藻在海洋中具有重要的生物地球化学意义;它们的光合作用占海洋年产量的40%（1）。它们的显著特征是由水合二氧化硅和少量有机物质组成的蜂窝状细胞壁（硅藻壳），组织为两个大小不等的重叠瓣膜（囊），类似于皮氏培养皿。生长通过卵泡膜的逐渐垂直分离进行，最终在无性分裂产生两个不同大小的子细胞，其中一个总是小于母细胞，导致细胞大小逐渐缩小（1，2）。细胞大小必须通过有性生殖或无性生殖细胞扩大定期恢复，以防止导致繁殖克隆灭绝的疾病。
Planktonic diatoms are of major biogeochemical importance in the sea; their photosynthesis contributes 40% of the total annual marine production (1). Their distinguishing feature is an areolated cell wall (frustule) composed of hydrated silicon dioxide and a small amount of organic matter organized as two unequally sized, overlapping valves (thecae) similar to a Petri dish. Growth proceeds through progressive vertical separation of the thecae, culminating in an asexual division that produces two differently sized daughter cells, one of which is always smaller than the parent cell, resulting in a progressive diminution in cell size (1, 2). Cell size must be periodically restored through sexual reproduction or asexual cell enlargement (3) to prevent morbidity leading to extinction of the reproducing clone.