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Title: Transcriptomic response in Acropora muricata under acute temperature stress follows preconditioned seasonal temperature fluctuations
Authors: Lee, Sonny T M
Keshavmurthy, Shashank
Fontana, Silvia
Takuma, Mezaki
Chou, Wen-Hua
Chen, Chaolun A
Issue Date: 9-Feb-2018
Citation: BMC Research Notes. 2018 Feb 09;11(1):119
Abstract: Abstract Objective Global climate change has resulted in the decline of health and condition of various coral reefs worldwide. Here, we describe expression profiles of Acropora muricata collected during opposing seasons in Otsuki, Kochi, Japan to define the capacity of corals to cope with changing environmental conditions. Coral communities in Otsuki experience large temperature fluctuations between the winter (~ 16 °C) and summer (~ 27 °C). Results Coral nubbins that were collected in the summer showed no change in photochemical efficiency when exposed to thermal or cold stress, while winter samples showed a decrease in photochemical health when subjected to thermal stress. Under cold stress, corals that were collected in the summer showed an up-regulation of actin-related protein and serine/threonine protein kinase, while corals collected during the winter did not show any cellular stress. On the other hand, under thermal stress, the most notable change was the up-regulation of phosphoenolpyruvate carboxykinase in corals that were collected during the winter season. Our observations in the differential genes expressed under temperature-derived stress suggest that A. muricata from Kochi may maintain physiological resilience due to the frequently encountered environmental stress, and this may play a role in the coral’s thermal tolerance.
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