Phenotypic response of the diatom Phaeodactylum tricornutum Bohlin to experimental changes in the inorganic carbon system
Phenotypic response of the diatom Phaeodactylum tricornutum Bohlin to experimental changes in the inorganic carbon system
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DOI：
10.1515/bot.2008.047
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发表时间：
2008-10-01
期刊：
影响因子：
2.2
通讯作者：
Ojeda, Fernando
中科院分区：
文献类型：
--
作者：
Bartual, Ana;Angel Galvez, J.;Ojeda, Fernando
三角褐指藻的生理和生物化学已被广泛研究，其生物学的某些方面是众所周知的。表型可塑性可能是其最显著的特征之一。两种基本的形态类型，纺锤形和三辐射形，可以在自然的液体环境中找到。虽然从一个形态型到另一个的转变以前已经报道，这种转变的生态原因和后果仍然未知。在这里，我们报告的变化与无机碳系统的变化相关的两种形态类型的Phaeodactylum的相对丰度。在高pH值或高溶解无机碳的培养物中生长的三辐射形态型的相对丰度增加，并显着，所以在亚饱和光照下生长。在高pH值下，这种增加与整体培养物生长速率的降低密切相关。在个人（细胞）的水平上，有一个更大的增加，在表面积的三辐射状形态（导致更高的表面积与体积比）比在纺锤形形态下的亚饱和照明的增长。这些结果提供了新的见解，这种硅藻的生物学，主要涉及到的性能（健身）的两个基本形态下对比照明的增长和不同的无机碳条件。
The physiology and biochemistry of Phaeodactylum tricornutum have been extensively studied, and some aspects of its biology are well known. Phenotypic plasticity is probably one of its most remarkable features. Two basic morphotypes, fusiform and triradiate, can be found in natural liquid environments. Although the transformation from one morphotype to the other has been previously reported, ecological causes and consequences of such transformation remain unknown. Here, we report changes in the relative abundance of the two morphotypes of Phaeodactylum associated with changes in the inorganic carbon system. The relative abundance of the triradiate morphotype increased in cultures grown at either high pH or high dissolved inorganic carbon, and markedly so under subsaturating illumination for growth. At high pH, this increase was strongly correlated with a decrease in the overall culture growth rate. At the individual (cell) level, there was a larger increase in the surface area of the triradiate morphotype (resulting in a higher surface-to-volume ratio) than in the fusiform morph under subsaturating illumination for growth. These results provide new insights into the biology of this diatom, mainly related to the performance (fitness) of the two basic morphotypes under contrasting illumination for growth and different inorganic carbon conditions.