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首页> 外文期刊>Marine biology >Change in zooxanthellae and mucocyte tissue density as an adaptive response to environmental stress by the coral, Montastraea annularis
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Change in zooxanthellae and mucocyte tissue density as an adaptive response to environmental stress by the coral, Montastraea annularis

机译：虫黄藻和粘液细胞组织密度的变化作为对珊瑚Montastraea ringis对环境压力的适应性反应

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摘要

Results from controlled in situ experimentation conducted on the leeward reef tract of Curasao, Netherlands Antilles, indicate that the coral Montastraea annularis exhibits a complex, yet consistent, cellular response to increasing sea surface temperature (SST) and decreasing irradiance. This was determined by simultaneously quantifying and tracking the tissue density of zooxanthellae and mucocytes using a novel technique that integrates the lectin histochemical stain wheat germ agglutinin (WGA) with high-resolution (200 nm) optical epifluorescence micros-rncopy. Coral colonies growing at 6-m water depth (WD) and an irradiance of 100.2 ± 6.5 μmol m~(-2) s~(-1) were treated with a shading experiment for 11 days that reduced irradiance to 34.9 ±6.6, 72.0 ±7.0 and 90.1 ± 4.2 μmol m~(-2) s~(-1), respectively. While a significant decrease in the density of both zooxanthellae and mucocytes were observed at all shade levels, the largest reduction occurred between the natural non-shaded control (44,298 ± 3,242 zooxanthellae cm~(-2); 4,853 ± 346 mucocytes cm~(-2)) and the highest shading level (13,982 ± 1,961 zooxanthallae cm~(-2); 2,544 ± 372.9 mucocytes cm~(-2)). Colonies were also sampled during a seasonal increase in SST of 1.5℃, where the density of zooxanthellae was significantly lower (from 54,710 ± 1,755 to 34,322 ± 2,894 cells cm~(-2)) and the density of mucocytes was significantly higher (from 6,100 ± 304 to 29,658 ± 3,937 cells cm~(-2)). These observations of coral cellular response to environmental change provide evidence to support new hypotheses for coral survival and the complex role played by mucus in feeding, microbial associations and resilience to increasing SST.
机译：在荷属安的列斯库拉索岛的背风道上进行的受控原位实验结果表明，环形山珊瑚珊瑚对海平面温度（SST）升高和辐照度降低表现出复杂而一致的细胞反应。这是通过使用一种将凝集素组织化学染色小麦胚芽凝集素（WGA）与高分辨率（200 nm）光学落射荧光显微镜相结合的新技术同时量化和跟踪人兽共鞭毛虫和粘液细胞的组织密度来确定的。将生长在6米水深（WD）且辐照度为100.2±6.5μmolm〜（-2）s〜（-1）的珊瑚菌落进行遮光处理11天，将辐照度降低至34.9±6.6，72.0分别为±7.0和90.1±4.2μmolm〜（-2）s〜（-1）。虽然在所有阴影水平下均观察到了人畜黄藻和粘液细胞密度的显着降低，但最大的减少发生在自然非阴影对照之间（44,298±3,242人畜黄藻cm〜（-2）； 4,853±​​346μc细胞cm〜（- 2））和最高遮阴度（13,982±1,961虫黄素cm〜（-2）; 2,544±372.9粘液细胞cm〜（-2））。在SST升高1.5℃的季节中也进行了菌落采样，虫黄藻的密度显着降低（从54,710±1,755到34,322±2,894个细胞cm〜（-2）），而粘液细胞的密度显着更高（从6,100 ±304至29,658±3,937细胞cm〜（-2））。这些对珊瑚细胞对环境变化的反应的观察结果提供了证据来支持关于珊瑚存活的新假说以及粘液在喂养，微生物结合以及对增强的海温的适应性中所起的复杂作用。

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  • 来源
    《Marine biology》 |2009年第11期|2379-2389|共11页
  • 作者

    Alan M. Piggot; Bruce W. Fouke; Mayandi Sivaguru; Robert A. Sanford; H. Rex Gaskins;

  • 作者单位

    Department of Geology, University of Illinois Urbana-Champaign, 1301 W. Green Street, Urbana, IL 61801, USA Division of Marine Geology and Geophysics, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA;

    Department of Geology, University of Illinois Urbana-Champaign, 1301 W. Green Street, Urbana, IL 61801, USA Department of Microbiology, University of Illinois Urbana-Champaign, 505 S. Goodwin Avenue, Urbana, IL 61801, USA Institute for Genomic Biology, University of Illinois Urbana-Champaign, 1206 W. Gregory Drive, Urbana, IL 61801, USA;

    Institute for Genomic Biology, University of Illinois Urbana-Champaign, 1206 W. Gregory Drive, Urbana, IL 61801, USA;

    Department of Geology, University of Illinois Urbana-Champaign, 1301 W. Green Street, Urbana, IL 61801, USA;

    Institute for Genomic Biology, University of Illinois Urbana-Champaign, 1206 W. Gregory Drive, Urbana, IL 61801, USA Department of Animal Sciences, University of Illinois Urbana-Champaign, 1207 W. Gregory Drive, Urbana, IL 61801, USA;

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