Are all eggs created equal? A case study from the Hawaiian reef-building coral Montipora capitata
Are all eggs created equal? A case study from the Hawaiian reef-building coral Montipora capitata
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所有的鸡蛋都是平等的吗？
DOI：
10.1007/s00338-012-0957-1
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发表时间：
2013
期刊：
影响因子：
3.5
通讯作者：
Rodrigues, Lisa J.
中科院分区：
文献类型：
--
作者：
Padilla-Gamiño, Jacqueline L.;Bidigare, Robert R.;Barshis, Daniel J.;Alamaru, Ada;Hédouin, Laetitia;Hernández-Pech, Xavier;Kandel, Frederique;Leon Soon, Sherril;Roth, Melissa S.;Rodrigues, Lisa J.
在海洋生物中，亲本效应在很大程度上未被探索，可能在决定珊瑚后代性状的表型范围方面发挥重要作用，影响其在环境挑战中生存的能力。本研究探讨了父母的影响和生活阶段的差异在夏威夷造礁珊瑚Montipora capitata从不同的环境，通过检查成熟的珊瑚群落和他们的蛋的生化成分。我们的研究结果表明，成虫和卵之间存在很大的生化差异，后者含有较高浓度的脂质（主要是蜡酯），泛素化蛋白（这可能表明蛋白质的高周转率）和抗氧化剂（例如，锰超氧化物歧化酶）。成珊瑚表现出较高的表型可塑性，强光环境中的珊瑚比低光环境中的珊瑚具有更多的蜡酯、更轻的组织δ 13 C特征和更高的共生藻密度，后者具有更高的辅助色素含量。一种绿藻色素（α-胡萝卜素）和强大的抗氧化剂存在于卵中;目前还不清楚这种色素是从异养食物来源还是从生活在成年珊瑚骨骼中的石内绿色藻类中获得的。尽管成人表现出广泛的表型可塑性，父母投资的背景下提供的能量储备和抗氧化防御是相同的鸡蛋从不同的网站。这种平等的投资最大限度地提高了所有胚胎和幼虫的能力，使其能够科普与漂浮在水面有关的挑战性条件，并成功地分散，直到找到合适的定居栖息地。
Parental effects have been largely unexplored in marine organisms and may play a significant role in dictating the phenotypic range of traits in coral offspring, influencing their ability to survive environmental challenges. This study explored parental effects and life-stage differences in the Hawaiian reef-building coralMontipora capitatafrom different environments by examining the biochemical composition of mature coral colonies and their eggs. Our results indicate that there are large biochemical differences between adults and eggs, with the latter containing higher concentration of lipids (mostly wax esters), ubiquitinated proteins (which may indicate high turnover rate of proteins) and antioxidants (e.g., manganese superoxide dismutase). Adults displayed high phenotypic plasticity, with corals from a high-light environment having more wax esters, lighter tissue δ13C signatures and higherSymbiodiniumdensities than adults from the low-light environment who had higher content of accessory pigments. A green-algal pigment (α-carotene) and powerful antioxidant was present in eggs; it is unclear whether this pigment is acquired from heterotrophic food sources or from endolithic green algae living in the adult coral skeletons. Despite the broad phenotypic plasticity displayed by adults, parental investment in the context of provisioning of energy reserves and antioxidant defense was the same in eggs from the different sites. Such equality in investment maximizes the capacity of all embryos and larvae to cope with challenging conditions associated with floating at the surface and to disperse successfully until an appropriate habitat for settlement is found.