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热带海洋学报

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不同光质驯化对涠洲岛美丽鹿角珊瑚热耐受性的影响研究

宛强1,2, 巩三强2, 彭梦娇2, 黄光贤1, 2, 谭荣华2, 王明威2, 余克服2, 3, 黄雯2
  

  1. 1. 广西大学 资源环境与材料学院, 广西 南宁 530004;

    2. 广西大学 广西南海珊瑚礁研究重点实验室/珊瑚礁研究中心/海洋学院, 广西 南宁 530004;

    3. 南方海洋科学与工程广东省实验室(广州), 广东 广州 511458



  • 收稿日期:2026-02-09 修回日期:2026-03-30 接受日期:2026-04-07
  • 通讯作者: 黄雯
  • 基金资助:
    国家自然科学基金(42476137); 广西科技基地与人才专项(桂科AD25069075); 广西自然科学基金(2023GXNSFAA026510)

Effects of Light Quality Acclimation on Thermal Tolerance of Acropora muricata from Weizhou Island

WAN Qiang1, 2, GONG Sanqiang2, PENG Mengjiao2, HUANG Guangxian1, 2, TAN Ronghua2, WANG Mingwei2, YU Kefu2, 3, HUANG Wen2   

  1. 1. School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China;

    2. Guangxi Laboratory on the Study of Coral Reefs in the South China Sea/ Coral Reef Research Center of China/ School of Marine Sciences, Guangxi University, Nanning 530004, China;

    3. Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China



  • Received:2026-02-09 Revised:2026-03-30 Accepted:2026-04-07
  • Contact: HUANG, Wen
  • Supported by:

     National Natural Science Foundation of China (42476137); Guangxi Science and Technology Program (Guike AD25069075); Guangxi Natural Science Foundation (2023GXNSFAA026510)

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摘要： 已有研究表明短期蓝光辐照能提高海南三亚的柔枝鹿角珊瑚(Acropora tenuis)珊瑚的热白化耐受性，但这种效应是否对不同珊瑚礁区的珊瑚具有普遍影响，以及蓝光提高珊瑚热白化耐受性是否受其它光质的影响尚不明确。本研究以涠洲岛美丽鹿角珊瑚(Acropora muricata)为研究对象，开展不同光质(白光、红光、蓝光)驯化及驯化后的升温胁迫实验，分析比较了珊瑚共生体表型、光合生理和抗氧化物活性等指标的变化规律。结果显示：(1)经7天光质驯化后，各处理组间虫黄藻密度、叶绿素a和类胡萝卜素含量无显著差异，但光合效率和氧化应激水平出现明显变化——相较于白光组，蓝光组的最大光量子产量(Fv/Fm)降低4.2%，虫黄藻活性氧(ROS)释放量降低10.0%，丙二醛(MDA)含量降低15.7%；而红光组则呈现相反趋势，Fv/Fm升高1.4%，ROS释放量升高15.0%，MDA含量升高5.3%。(2)光质驯化后升温胁迫(32℃)第7天，白光组和红光组珊瑚表观颜色出现明显变化(从深褐色变为浅黄色，部分珊瑚组织出现褪色白化现象)，而蓝光组珊瑚表观颜色无明显变化并保持着较高的Fv/Fm；与白光组相比，蓝光组虫黄藻密度、叶绿素a和类胡萝卜素含量以及高出9.3%、13.9%和18.3%，红光组则分别降低10.7%、10.4%和2.3%。(3)蓝光组在升温胁迫过程中保持着最高的抗氧化酶活性(含量)，在32℃第7天有着最低的的ROS和MDA水平。上述结果表明，不同光质短期驯化后对珊瑚共生体的热胁迫响应具有不同的作用效果，蓝光驯化可通过下调基础代谢水平、提升抗氧化酶水平、减少ROS累积增强美丽鹿角珊瑚热耐受性。该研究结果为深入解析光质调控珊瑚热适应的机理奠定了基础，也为通过光环境调控开展珊瑚保护策略研究提供了科学依据。

关键词: 全球变暖, 涠洲岛, 美丽鹿角珊瑚, 不同光质驯化, 热耐受性

Abstract: A previous study has demonstrated that short-term blue light exposure enhances thermal bleaching tolerance in Acropora tenuis from Sanya, Hainan. However, whether this effect is universally applicable to corals from different reef regions and whether it is modulated by other light spectra remain unclear. In this study, we used Acropora muricata from Weizhou Island to investigate the effects of acclimation under different light quality (white, red, and blue light) followed by thermal stress, analyzing changes in holobiont phenotype, photosynthetic physiology, and antioxidant activity.Results showed: (1) After 7 days of light acclimation, no significant differences were observed among treatments in zooxanthellae density, chlorophyll a, or carotenoid content. However, photosynthetic efficiency and oxidative stress levels differed markedly—compared to white light, blue light reduced maximum quantum yield (Fv/Fm) by 4.2%, zooxanthellae reactive oxygen species (ROS) release by 10.0%, and malondialdehyde (MDA) content by 15.7%, while red light showed opposite trends with Fv/Fm increasing by 1.4%, ROS release by 15.0%, and MDA content by 5.3%. (2) On day 7 of thermal stress (32°C) following acclimation, white and red light corals exhibited visible color changes (shifting from dark brown to pale yellow with partial tissue bleaching), whereas blue light corals maintained their appearance and higher Fv/Fm. Compared to white light, blue light treatment resulted in 9.3%, 13.9%, and 18.3% higher zooxanthellae density, chlorophyll a, and carotenoid content, respectively, while red light showed reductions of 10.7%, 10.4%, and 2.3%. (3) Throughout thermal stress, blue light corals maintained the highest antioxidant enzyme activity and exhibited the lowest ROS and MDA levels on day 7 at 32°C.These results demonstrate that short-term acclimation under different light spectra differentially modulates holobiont thermal stress responses. Blue light acclimation enhances thermal tolerance inA. muricata by downregulating basal metabolism, elevating antioxidant enzyme levels, and reducing ROS accumulation. This study provides mechanistic insights into light-mediated coral thermal adaptation and offers scientific evidence for coral conservation strategies through light environment manipulation.

Key words: Global warming, Weizhou Island, Acropora muricata, light quality acclimation, thermal tolerance