海洋酸化影响硅藻固碳相关基因表达的研究进展

Effects of Ocean Acidification on Gene Expression Related to Carbon Fixation Pathway of Diatoms: A Review

由于人类活动导致的大气CO2浓度升高,将导致海水p H值下降,从而引起海洋酸化,改变海水碳酸盐系统,影响海洋生物的生长、发育、代谢、凋亡及钙化过程等。研究海洋酸化对藻类固碳途径(生物碳泵)的影响对了解和预测未来海洋碳泵的发展趋势具有重要意义,硅藻作为海洋初级生产力的主要生产者,研究海洋酸化影响其固碳过程的意义更大。尽管目前已对海洋酸化影响硅藻的生理生化过程有了较为深入的研究,但从基因表达水平上研究海洋酸化对硅藻固碳过程的影响还较少,本文对此领域做一概述。

Atmospheric CO2 concentrations have been risen because of human activities. Elevated atmospheric CO2 dissolves into seawater driving a chemical equilibrium such that p H of the oceans becomes more acidic(ocean acidification, OA). And ocean acidification has remarkable effects on the growth, metabolism, photosynthesis,calcification, reproduction and development of marine organisms. Research on the effects of ocean acidification on carbon fixation pathway of algae has important significance to understand and predict development of marine carbon pump. As a marine primary producer, diatoms have gradually become major actors in the oceanic cycles of elements, thus studies on effects of ocean acidification on carbon fixation pathway of diatoms have great significance. Though effects of ocean acidification on the physiology/biochemistry of diatoms have been comparatively deep researched, the effects of ocean acidification on carbon fixation pathway of diatoms are still poorly understood at gene expression level, which will be reviewed in this study.