Zooxanthellar symbiosis in planula larvae of the coral Pocillopora damicornis.
Zooxanthellar symbiosis in planula larvae of the coral Pocillopora damicornis.
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DOI：
10.1016/j.jembe.2010.02.003
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发表时间：
2010-04-30
影响因子：
2
通讯作者：
Rowan, Rob
中科院分区：
文献类型：
--
作者：
Gaither, Michelle R.;Rowan, Rob
关键词：
我们使用珊瑚研究中熟悉的标准来描述珊瑚 Pocillopora damicornis 的平面虫黄藻共生关系。与成年珊瑚类似，浮浪藻表现出光适应能力，因为共生体叶绿素 a (chl a) 发生了变化；光合作用光饱和常数的变化（Ik）；并且，在光照不足的情况下，虫黄藻减少，呼吸减少，体重减轻增加，对光抑制的敏感性增加。新释放的浮浪藻中虫黄藻的数量在巢内至少相差三倍。虫黄藻数量较少和较多的浮浪藻（分别称为浅浮浪藻和深色浮浪藻）在共生叶绿素 a 含量、Ik 或暗呼吸的生物量特异性速率方面没有差异。浅色浮浪藻的光合作用率较低，但这种差异在三周后消失，此时浅色浮浪藻中的虫黄藻数量增加了 225%，深色浮浪藻中的虫黄藻数量增加了 31%。在富含铵的海水中培养的浮藻中，虫黄藻的数量也显着增加；铵显然还可以防止重量损失并引起沉降。大约 70% 的光合固定碳（使用 14C 标记）显然从虫黄藻转移到了宿主体内。对在 0.3% 和 11% 阳光下培养的浮浪藻进行比较表明，光合作用提供了后者利用的约 31% 的能量。总体而言，我们得出的结论是，P. damicornis 浮浪中的共生生理学与成年珊瑚的共生生理学大致相似。
We characterized the planular-zooxanthellae symbiosis of the coral Pocillopora damicornis using criteria that are familiar in studies on corals. Similar to adult corals, planulae exhibited photoacclimation, as changes in symbiont chlorophyll a (chl a); changes in the light-saturation constant for photosynthesis (Ik); and, at insufficient light, fewer zooxanthellae, decreased respiration, increased weight loss, and increased sensitivity to photoinhibition. Numbers of zooxanthellae in newly-released planulae varied by at least three-fold within broods. Planulae with low versus high numbers of zooxanthellae (termed pale versus dark planulae, respectively) did not differ in symbiont chl-a content, Ik, or biomass-specific rate of dark respiration. Pale planulae had lower rates of photosynthesis, but this difference vanished after three weeks, when zooxanthellar numbers increased by 225% in pale planulae and by 31% in dark planulae. Numbers of zooxanthellae also increased significantly in planulae cultured in ammonium-enriched seawater; ammonium also apparently prevented weight loss and induced settlement. Approximately 70% of photosynthetically-fixed carbon (labeled using 14C) apparently was translocated from the zooxanthellae to their host. A comparison of planulae cultured at 0.3% versus 11% sunlight suggested that photosynthesis provided ~ 31% of the energy utilized by the latter. Overall, we conclude that the physiology of symbiosis in planulae of P. damicornis is broadly similar to symbiosis physiology in adult corals.
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影响因子：
2.7
作者：
Ault, TR
通讯作者：
Ault, TR
影响因子：
5.2
作者：
Anthony, KRN;Hoegh-Guldberg, O
通讯作者：
Hoegh-Guldberg, O
影响因子：
2.4
作者：
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通讯作者：
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影响因子：
2.4
作者：
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通讯作者：
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DOI：
10.1098/rstb.1997.0033
发表时间：
1997-04-29
期刊：
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
影响因子：
--
作者：
Jones, RJ;Yellowlees, D
通讯作者：
Yellowlees, D