Succession of delayed fluorescence correlated with coral bleaching in the hermatypic coral acropora tenuis.
Succession of delayed fluorescence correlated with coral bleaching in the hermatypic coral acropora tenuis.
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延迟荧光的连续性与造形珊瑚鹿角珊瑚的白化相关。
DOI：
10.1016/j.marpolbul.2020.111008
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发表时间：
2020
影响因子：
5.8
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
Takeuchi;I.;Takaichi;D.;Katsumata;M. and Ishibashi;H.
我们通过监测颜色变化并测量细角鹿角珊瑚中共生甲藻的延迟荧光 (DF) 来研究珊瑚白化，暴露于 1.0 µg/L Irgarol 1051（光系统 II 除草剂）14 天。 Irgarol 浓度与世界国际港口地区的浓度相当。在整个实验过程中，对照处理下的珊瑚颜色和 DF 保持稳定，而在 Irgarol 处理下，珊瑚表现出逐渐白化。 Irgarol 处理导致慢速衰减 DF 分量（10.1-60.0 s）快速下降，而快速衰减 DF 分量（0.1-10.0 s）在 6 天后显着下降。后者值与珊瑚颜色之间的显着相关性表明，如果醌类QA和QBi的电子积累功能受到损害，珊瑚就会白化。本研究将有助于了解接触除草剂的珊瑚白化的机制。
We investigated coral bleaching by monitoring colour changes and measuring the delayed fluorescence (DF) of symbiotic dinoflagellates in the hermatypic coralAcropora tenuis, exposed to 1.0 μg/L Irgarol 1051 (photosystem II herbicide) for 14 d. The Irgarol concentration corresponded to those from international port regions of the world. The coral colour and DFs under the control treatment were stable throughout the experiment, whereas under the Irgarol treatment the corals showed gradual bleaching. The Irgarol treatment caused a rapid decrease in the slow decay DF component (10.1–60.0 s), while the fast decay DF component (0.1–10.0 s) decreased significantly after 6 d. The significant correlation between the latter values and the coral colour indicates that if the electron accumulation function of quinones QAand QBis compromised, corals will bleach. The present study will contribute to the understanding of the mechanism involved in bleaching of coral exposed to herbicides.