State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, People's Republic of China.
Microb Ecol. 2011 Nov;62(4):931-40. doi: 10.1007/s00248-011-9892-x. Epub 2011 Jun 24.
Diatoms are responsible for biofouling, which causes many problems in various marine industries. This study examined the effects of different light conditions (intensity, incident direction, time of illumination) on the settling behavior of the marine diatom Navicula sp. on glass surfaces. The density of this diatom's settlement on glass was strongly influenced by light conditions. Moreover, very weak light emitted on the bottom of the culture dish could also rapidly inhibit diatom settlement. These phenomena were explained by spatial interference between chloroplast and holdfast-like structures inside the thecae. The holdfast-like structure is observed to be responsible for diatom locomotion and hence the settlement behavior. It was proposed that the interrelation of illumination and attachment of diatoms allowed them to better adapt to the habitat with higher efficiency of attachment and successive reproduction.
硅藻是生物污损的主要原因，这给各种海洋产业带来了许多问题。本研究考察了不同光照条件（强度、入射方向、光照时间）对海洋硅藻舟形藻在玻璃表面沉降行为的影响。这种硅藻在玻璃上的沉降密度受光照条件的强烈影响。此外，在培养皿底部发出的非常弱的光也可以迅速抑制硅藻的沉降。这些现象可以用叶绿体和壳内类似固着器的结构之间的空间干扰来解释。观察到类似固着器的结构负责硅藻的运动，从而影响其沉降行为。有人提出，光照和硅藻附着的相互关系使它们能够更好地适应附着效率更高和连续繁殖的栖息地。
