Belt Simon T, Massé Guillaume, Allard W Guy, Robert Jean-Michel, Rowland Steven J
Petroleum and Environmental Geochemistry Group, Department of Environmental Sciences, University of Plymouth, Drake Circus, Plymouth PL4 8AA, Devon, UK.
Phytochemistry. 2002 Jan;59(2):141-8. doi: 10.1016/s0031-9422(01)00444-7.
The effect of life cycle on the distributions of C(25) and C(30) highly branched isoprenoid (HBI) alkene lipids has been investigated for the marine diatom Rhizosolenia setigera. The concentrations of the C(30) compounds are largely independent of the cell volume, though the ratios of the individual isomers possessing five and six double bonds show a dependence on the position of the cell during its life cycle, especially during auxosporulation. In contrast to the C(30) pseudo-homologues, the C(25) isomers are not always detected in cultures of R. setigera. The biosynthesis of the C(25) HBIs would appear to result from the onset of auxosporulation, with further changes to their distributions taking place after this phase, including the formation of more unsaturated isomers. The results of this investigation may be used in part to explain the large variations in these lipids reported previously.
已针对海洋硅藻纤细根管藻研究了生命周期对C(25)和C(30)高支链异戊二烯（HBI）烯烃脂质分布的影响。C(30)化合物的浓度在很大程度上与细胞体积无关，不过具有五个和六个双键的各个异构体的比例显示出对细胞在其生命周期中的位置的依赖性，尤其是在形成复大孢子期间。与C(30)假同系物相反，在纤细根管藻培养物中并非总能检测到C(25)异构体。C(25) HBI的生物合成似乎源于复大孢子形成的开始，在此阶段之后其分布会进一步变化，包括形成更多不饱和异构体。本研究结果可部分用于解释先前报道的这些脂质的巨大差异。
