Effects of reduced salinity on the photosynthetic characteristics and intracellular DMSP concentrations of the red coralline alga, Lithothamnion glaciale.
Effects of reduced salinity on the photosynthetic characteristics and intracellular DMSP concentrations of the red coralline alga, Lithothamnion glaciale.
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DOI：
10.1007/s00227-015-2650-8
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发表时间：
2015
期刊：
影响因子：
2.4
通讯作者：
Kamenos, Nicholas A.
中科院分区：
文献类型：
--
作者：
Burdett, Heidi L.;Hatton, Angela D.;Kamenos, Nicholas A.
中高纬度峡湾沿海环境经历自然变化的盐度制度。气候预测表明，未来流入沿海海洋的淡水将增加，使沿海生物面临更长时期的盐度降低。这项研究调查了低盐度对Lithothamnion glaciale的影响，Lithothamnion glaciale是一种在中高纬度峡湾地区发现的红珊瑚虫，在为期21天的实验中。具体测量包括：细胞内二甲基磺基丙酸盐（DMSP，藻类次级代谢物和气候活性气体二甲基硫的主要前体）的浓度、色素组成和光合特性。两种处理之间细胞内DMSP浓度无显著差异，表明DMSP在L. glaciale不是一种相容的溶质，可能有利于抗氧化作用。光合参数（包括色素成分）表现出混合的反应，这表明一定程度的光合弹性降低盐度。本研究为L. glaciale响应降低盐度。这对L.在一个预计的淡水化情景下，对冰川进行了评估，并为生态系统一级的预计变化提供了生物体一级的详细信息，如果未来低盐度条件变得更加频繁和更加强烈。
Mid- to high-latitude fjordic coastal environments experience naturally variable salinity regimes. Climate projections suggest that freshwater input into the coastal ocean will increase in the future, exposing coastal organisms to further periods of reduced salinity. This study investigated the effect of low salinity on Lithothamnion glaciale, a red coralline alga found in mid- to high-latitude fjordic regions, during a 21-day experiment. Specific measurements included: the intracellular concentration of dimethylsulphoniopropionate (DMSP, an algal secondary metabolite and major precursor to the climatically active gas dimethylsulphide), pigment composition and photosynthetic characteristics. No significant difference in intracellular DMSP concentrations was observed between treatments, suggesting that the primary function for DMSP in L. glaciale is not as a compatible solute, perhaps favouring an antioxidant role . Photosynthetic parameters (including pigment composition) exhibited a mixed response, suggesting some degree of photosynthetic resilience to reduced salinity. This study provides evidence of intracellular mechanisms adopted by L. glaciale in response to reduced salinity. This has significant implications for the survival of L. glaciale under a projected freshening scenario and provides organism-level detail to ecosystem-level projected changes should lower-salinity conditions become more frequent and more intense in the future.
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DOI：
10.1007/978-90-481-9268-7_9
发表时间：
2010-01-01
期刊：
CHLORPHYLL A FLUORESCENCE IN AQUATIC SCIENCES: METHODS AND APPLICATIONS
影响因子：
--
作者：
Enriquez, Susana;Borowitzka, Michael A.
通讯作者：
Borowitzka, Michael A.
DOI：
10.1016/j.jembe.2006.10.056
发表时间：
2007-04-16
影响因子：
2
作者：
Belshe, E. F.;Durako, M. J.;Blum, J. E.
通讯作者：
Blum, J. E.
影响因子：
3.3
作者：
Kamenos, NA;Moore, PG;Hall-Spencer, JM
通讯作者：
Hall-Spencer, JM
影响因子：
5.8
作者：
Kamenos, Nicholas A.;Hoey, Trevor B.;Claverie, Thomas
通讯作者：
Claverie, Thomas
影响因子：
3.6
作者：
Josey, SA;Marsh, R
通讯作者：
Marsh, R