CO2升高对风信子鹿角珊瑚(Acropora hyacinthus)钙化速率和基因表达的影响*

doi:10.11978/2022182

Abstract

Abstract:

We studied the responses of coral Acropora hyacinthus to the increase of CO₂, with a simulated experiment in which corals were cultured in natural seawater as the control group with pCO₂ of 565 μatm and in high CO₂ treatment with pCO₂ of 1135 μatm. The effects of seawater acidification on the calcification and gene expression were investigated. The results showed that under acidification stress, the calcification rate of A. hyacinthus significantly decreased, and the gene expression was greatly affected. As the pathways of organic matter transport, anion transport, chemical stress were up-regulated, and animal organ development, lipid transport, cell biosynthesis, cell surface receptor signal and other pathways were down-regulated. Among the calcification related genes, carbonic anhydrase was down-regulated, and Ca²⁺-ATPase and calcium ion transport related genes were up-regulated. This experiment showed that high CO₂ significantly affected the calcification and gene expression of A. hyacinthus, in which the decrease of calcification was mainly due to the down-regulation of carbonic anhydrase resulting in the decrease of $\mathrm{HCO}_{3}^{-}$.

Key words: seawater acidification, Acropora hyacinthus, gene expression, calcification

YUAN Xiangcheng, LIANG Yuxian, SONG Yan, YU Xiaolei, HUANG Hui, ZHOU Weihua. Effects of ocean acidification on the calcification and gene expression in coral Acropora hyacinthus^*[J].Journal of Tropical Oceanography, 2024, 43(3): 40-48.

Figures/Tables 6

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Effects of ocean acidification on the calcification and gene expression in coral Acropora hyacinthus^*

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Effects of ocean acidification on the calcification and gene expression in coral Acropora hyacinthus*

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Effects of ocean acidification on the calcification and gene expression in coral Acropora hyacinthus^*