Future CO₂-induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods.

ABSTRACT: Photoperiods have an important impact on macroalgae living in the intertidal zone. Ocean acidification also influences the physiology of macroalgae. However, little is known about the interaction between ocean acidification and photoperiod on macroalgae. In this study, a green alga Ulva linza was cultured under three different photoperiods (L: D = 8:16, 12:12, 16:8) and two different CO₂ levels (LC, 400 ppm; HC, 1,000 ppm) to investigate their responses. The results showed that relative growth rate of U. linza increased with extended light periods under LC but decreased at HC when exposed to the longest light period of 16 h compared to 12 h. Higher CO₂ levels enhanced the relative growth rate at a L: D of 8:16, had no effect at 12:12 but reduced RGR at 1

SUBMITTER: Yue F 

PROVIDER: S-EPMC6555391 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature