Dynamics of lipid and fatty acid composition of shallow-water corals under thermal stress: an experimental approach |
| |
Authors: | A B Imbs I M Yakovleva |
| |
Institution: | (1) A. V. Zhirmunsky Institute of Marine Biology, Far Eastern Branch of the Russian Academy of Sciences, Palchevskogo 17, 690041 Vladivostok, Russia |
| |
Abstract: | Coral bleaching induces changes in lipid and fatty acid composition that result in low lipid content, reducing the likelihood
of coral survival. Species-specific differences in the metabolism of lipid reserves may contribute to the differential resistance
of corals under acute heat exposures. Here, we examined the dynamics of lipids and fatty acid abundance in corals subjected
to short-term heat stress. The stony corals Acropora intermedia, Montipora digitata, and the soft coral Sinularia capitalis all showed a 60–75% decline in both storage and structural lipids. However, S. capitalis and M. digitata exhibited no significant change in the percentages of structural lipids (i.e., polar lipids and sterols) until they had lost
90–95% of their endosymbionts, whereas A. intermedia showed a rapid decline in structural lipids after a 50% loss of symbionts. After a 90–95% loss of symbionts under heat stress,
all three corals showed a relative depletion of polyunsaturated fatty acids that had symbiont biomarkers, suggesting that
polyunsaturated fatty acids were translocated from the symbiont to the coral host tissue. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|