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首页> 外文期刊>Coral reefs: journal of the International Society for Reef Studies >Ontogenetic change in the lipid and fatty acid composition of scleractinian coral larvae
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Ontogenetic change in the lipid and fatty acid composition of scleractinian coral larvae

机译：巩膜珊瑚幼虫体内脂质和脂肪酸组成的遗传变化

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Some scleractinian coral larvae have an extraordinary capacity to delay metamorphosis, and this is reflected in the large geographic range of many species. Coral eggs typically contain a high proportion of wax esters, which have been hypothesized to provide a source of energy for long-distance dispersal. To better understand the role of lipids in the dispersal of broadcast spawning coral larvae, ontogenetic changes in the lipid and fatty acid composition of Goniastrea retiformis were measured from the eggs until larvae were 30 days old. Egg biomass was 78. 8 ± 0. 5% lipids, 86. 3 ± 0. 2% of which were wax esters, 9. 3 ± 0. 0% polar lipids, 4. 1 ± 0. 2% sterols, and 0. 3 ± 0. 1% triacylglycerols. The biomass of wax esters declined significantly through time, while polar lipids, sterols and triacylglycerols remained relatively constant, suggesting that wax esters are the prime source of energy for development. The most prevalent fatty acid in the eggs was palmitic acid, a marker of the dinoflagellate Symbiodinium, highlighting the importance of symbiosis in coral reproductive ecology. The proportion of polyunsaturated fatty acids declined through time, suggesting that they are essential for larval development. Interestingly, triacylglycerols are only abundant in the propagules that contain Symbiodinium, suggesting important differences in the energetic of dispersal among species with vertical and horizontal transmission of symbionts.
机译：一些巩膜珊瑚幼虫具有超强的延缓变态的能力，这反映在许多物种的广阔地理范围内。珊瑚卵通常含有高比例的蜡酯，据推测这些蜡酯可为长距离分散提供能量来源。为了更好地了解脂质在繁殖的产卵珊瑚幼虫的扩散中的作用，从卵中测量了网状Goniastrea retiformis的脂质和脂肪酸组成的个体发育变化，直到幼体发育30天。鸡蛋的生物量为78. 8±0. 5％脂质，86。3±0. 2％是蜡酸酯，9。3±0. 0％极性脂质，4。1±0. 2％固醇和0 3±0. 1％三酰基甘油蜡酯的生物量随时间显着下降，而极性脂质，固醇和三酰基甘油则保持相对恒定，这表明蜡酯是发展能源的主要来源。鸡蛋中最普遍的脂肪酸是棕榈酸，是鞭毛藻共生生物的标志物，突显​​了共生在珊瑚繁殖生态学中的重要性。多不饱和脂肪酸的比例随着时间的推移而下降，这表明它们对于幼体发育至关重要。有趣的是，三酰基甘油仅在含有共生素的繁殖体中含量丰富，这表明共生体在垂直和水平方向上传播的物种之间的分散能存在重要差异。

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