Dynamic photoinhibition exhibited by red coralline algae in the Red Sea.
Dynamic photoinhibition exhibited by red coralline algae in the Red Sea.
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DOI：
10.1186/1471-2229-14-139
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发表时间：
2014-05-20
影响因子：
5.3
通讯作者：
Kamenos NA
中科院分区：
文献类型：
--
作者：
Burdett HL;Keddie V;MacArthur N;McDowall L;McLeish J;Spielvogel E;Hatton AD;Kamenos NA
红珊瑚藻是热带珊瑚礁系统的重要组成部分，它们的成功和发展至少部分取决于光合作用。然而，对红珊瑚藻光合作用特性的自然变异却知之甚少。本研究探讨了结壳Porolithon sp.和自由生活的Lithophyllum kotschyanum的日变化。测量参数包括：光合特性、色素组成、叶状体反射率和二甲基磺基丙酸酯（DMSP）的细胞内浓度，DMSP是一种藻类抗氧化剂，其来源于光合作用的间接产物蛋氨酸。L. Kotschyanumthalli的特征在于漂白的顶面和着色的底面。最小饱和强度和细胞内DMSP浓度的Porolithon属的特点是显着的昼夜模式，在响应高光制度。最小饱和强度的日变化在L. kotschyanum也很明显。L. kotschyanum也表现出昼夜模式，随着环境辐照度的增加而变得越来越反射。L的底面kotschyanum，这是阴影从环境光暴露，表现出小得多的昼夜变化。这项研究强调了珊瑚藻采取的一些动态光抑制策略，使它们能够容忍，而不是被抑制，热带珊瑚礁系统的自然高辐照度;一个因素，可能会成为未来全球变化预测下更重要的。在这方面，这项研究对热带珊瑚礁管理规划和养护监测具有重大意义，如果不考虑自然变异，这些规划和监测可能会有缺陷。这项研究提供的信息可以用来通知未来的调查珊瑚藻的珊瑚礁增生，生态系统服务的提供和古环境重建的贡献。
Red coralline algae are critical components of tropical reef systems, and their success and development is, at least in part, dependent on photosynthesis. However, natural variability in the photosynthetic characteristics of red coralline algae is poorly understood. This study investigated diurnal variability in encrusting Porolithon sp. and free-living Lithophyllum kotschyanum. Measured parameters included: photosynthetic characteristics, pigment composition, thallus reflectance and intracellular concentrations of dimethylsulphoniopropionate (DMSP), an algal antioxidant that is derived from methionine, an indirect product of photosynthesis. L. kotschyanum thalli were characterised by a bleached topside and a pigmented underside. Minimum saturation intensity and intracellular DMSP concentrations in Porolithon sp. were characterised by significant diurnal patterns in response to the high-light regime. A smaller diurnal pattern in minimum saturation intensity in the topside of L. kotschyanum was also evident. The overall reflectance of the topside of L. kotschyanum also exhibited a diurnal pattern, becoming increasingly reflective with increasing ambient irradiance. The underside of L. kotschyanum, which is shaded from ambient light exposure, exhibited a much smaller diurnal variability. This study highlights a number of dynamic photoinhibition strategies adopted by coralline algae, enabling them to tolerate, rather than be inhibited by, the naturally high irradiance of tropical reef systems; a factor that may become more important in the future under global change projections. In this context, this research has significant implications for tropical reef management planning and conservation monitoring, which, if natural variability is not taken into account, may become flawed. The information provided by this research may be used to inform future investigations into the contribution of coralline algae to reef accretion, ecosystem service provision and palaeoenvironmental reconstruction.
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影响因子：
3.5
作者：
Heyward, AJ;Negri, AP
通讯作者：
Negri, AP
DOI：
10.1016/j.jembe.2006.10.056
发表时间：
2007-04-16
影响因子：
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作者：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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