Rapid Acclimation Ability Mediated by Transcriptome Changes in Reef-Building Corals.
Bottom Line: For long-lived organisms, acclimation likely generates a faster response but is only effective if the rates and limits of acclimation match the dynamics of local environmental variation.This is in addition to a previously observed longer term response, distinguishable by its shift in baseline expression, under nonstressful conditions.Such rapid acclimation may provide some protection for this species of coral against slow onset of warming ocean temperatures.
Affiliation: Department of Biology, Stanford University firstname.lastname@example.org.Show MeSH
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Mentions: Corals acclimated to 31 °C or variable (29–33 °C) temperature regimes showed higher thermal tolerance, measured by the proportion of chlorophyll a retained after heat stress, than corals in the control acclimation treatment (fig. 2a). Corals from all three acclimation temperatures show increased heat resistance between days 0 and 2. This is likely due to recovery from either transplant stress or some other nontemperature effect associated with moving colonies from the reef to the tanks. If we exclude day 0 and thus the artifact of transplantation, we observe a significant difference between acclimation treatments in the proportion of chlorophyll a retained in heat-stressed branches compared with nonstressed branches (P < 0.05). This pattern is also apparent in the concentration of chlorophyll a from heat-stressed branches alone; branches from 31 °C and variable acclimation treatments had more chlorophyll a after heat stress than the control (P < 0.01; fig. 2b).Fig. 2.—
Affiliation: Department of Biology, Stanford University email@example.com.