Thermal and Herbicide Tolerances of Chromerid Algae and Their Ability to Form a Symbiosis With Corals

Frontiers in Microbiology
Leela J ChakravartiMadeleine J H van Oppen

Abstract

Reef-building corals form an obligate symbiosis with photosynthetic microalgae in the family Symbiodiniaceae that meet most of their energy requirements. This symbiosis is under threat from the unprecedented rate of ocean warming as well as the simultaneous pressure of local stressors such as poor water quality. Only 1°C above mean summer sea surface temperatures (SSTs) on the Great Barrier Reef (GBR) can trigger the loss of Symbiodiniaceae from the host, and very low concentrations of the most common herbicide, diuron, can disrupt the photosynthetic activity of microalgae. In an era of rapid environmental change, investigation into the assisted evolution of the coral holobiont is underway in an effort to enhance the resilience of corals. Apicomplexan-like microalgae were discovered in 2008 and the Phylum Chromerida (chromerids) was created. Chromerids have been isolated from corals and contain a functional photosynthetic plastid. Their discovery therefore opens a new avenue of research into the use of alternative/additional photosymbionts of corals. However, only two studies to-date have investigated the symbiotic nature of Chromera velia with corals and thus little is known about the coral-chromerid relationship. Furthermore,...Continue Reading

Citations

May 27, 2020·Environmental Microbiology Reports·Amin R MohamedDavid J Miller
Jan 18, 2021·The Science of the Total Environment·Christopher A BrunnerAndrew P Negri
Nov 6, 2021·Scientific Reports·Magena MarzonieAndrew P Negri

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Datasets Mentioned

BETA
JN986789.1
JN986790.1

Methods Mentioned

BETA
environmental stress
light microscopy

Software Mentioned

lme4
Mega
BLASTn
Sequencher
R

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