Photorespiration in eelgrass (Zostera marina L.): A photoprotection mechanism for survival in a CO₂-limited world.

ABSTRACT: Photorespiration, commonly viewed as a loss in photosynthetic productivity of C3 plants, is expected to decline with increasing atmospheric CO₂, even though photorespiration plays an important role in the oxidative stress responses. This study aimed to quantify the role of photorespiration and alternative photoprotection mechanisms in Zostera marina L. (eelgrass), a carbon-limited marine C3 plant, in response to ocean acidification. Plants were grown in controlled outdoor aquaria at different [CO₂]_aq ranging from ~55 (ambient) to ~2121 μM for 13 months and compared for differences in leaf photochemistry by simultaneous measurements of O₂ flux and variable fluorescence. At ambient [CO₂], photosynthesis was carbon limited a

SUBMITTER: Celebi-Ergin B 

PROVIDER: S-EPMC9692008 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature