Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13702 |
Rapid thermal adaptation in photosymbionts of reef-building corals | |
Chakravarti, Leela J.1,2,3; Beltran, Victor H.1; van Oppen, Madeleine J. H.1,3,4 | |
2017-11-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Climate warming is occurring at a rate not experienced by life on Earth for 10s of millions of years, and it is unknown whether the coral-dinoflagellate (Symbiodinium spp.) symbiosis can evolve fast enough to ensure coral reef persistence. Coral thermal tolerance is partly dependent on the Symbiodinium hosted. Therefore, directed laboratory evolution in Symbiodinium has been proposed as a strategy to enhance coral holobiont thermal tolerance. Using a reciprocal transplant design, we show that the upper temperature tolerance and temperature tolerance range of Symbiodinium C1 increased after similar to 80 asexual generations (2.5 years) of laboratory thermal selection. Relative to wild-type cells, selected cells showed superior photophysiological performance and growth rate at 31 degrees C invitro, and performed no worse at 27 degrees C; they also had lower levels of extracellular reactive oxygen species (exROS). In contrast, wild-type cells were unable to photosynthesise or grow at 31 degrees C and produced up to 17 times more exROS. In symbiosis, the increased thermal tolerance acquired ex hospite was less apparent. In recruits of two of three species tested, those harbouring selected cells showed no difference in growth between the 27 and 31 degrees C treatments, and a trend of positive growth at both temperatures. Recruits that were inoculated with wild-type cells, however, showed a significant difference in growth rates between the 27 and 31 degrees C treatments, with a negative growth trend at 31 degrees C. There were no significant differences in the rate and severity of bleaching in coral recruits harbouring wild-type or selected cells. Our findings highlight the need for additional Symbiodinium genotypes to be tested with this assisted evolution approach. Deciphering the genetic basis of enhanced thermal tolerance in Symbiodinium and the cause behind its limited transference to the coral holobiont in this genotype of Symbiodinium C1 are important next steps for developing methods that aim to increase coral bleaching tolerance. |
英文关键词 | Acropora cytherea Acropora hyacinthus Acropora sarmentosa assisted evolution coral bleaching experimental evolution Great Barrier Reef Symbiodinium thermal stress |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412322700020 |
WOS关键词 | FREE-LIVING SYMBIODINIUM ; CLIMATE-CHANGE ; OCEAN ACIDIFICATION ; SYMBIOTIC ALGAE ; EVOLUTIONARY RESPONSES ; PHENOTYPIC PLASTICITY ; ELEVATED-TEMPERATURE ; MONTASTREA-ANNULARIS ; OXIDATIVE STRESS ; PHOTOSYSTEM-II |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17495 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Australian Inst Marine Sci, Townsville, Qld, Australia; 2.James Cook Univ, Coll Marine & Environm Sci, Townsville, Qld, Australia; 3.James Cook Univ, Australian Res Council, Ctr Excellence Coral Reef Studies, Townsville, Qld, Australia; 4.Univ Melbourne, Sch BioSci, Parkville, Vic, Australia |
推荐引用方式 GB/T 7714 | Chakravarti, Leela J.,Beltran, Victor H.,van Oppen, Madeleine J. H.. Rapid thermal adaptation in photosymbionts of reef-building corals[J]. GLOBAL CHANGE BIOLOGY,2017,23(11). |
APA | Chakravarti, Leela J.,Beltran, Victor H.,&van Oppen, Madeleine J. H..(2017).Rapid thermal adaptation in photosymbionts of reef-building corals.GLOBAL CHANGE BIOLOGY,23(11). |
MLA | Chakravarti, Leela J.,et al."Rapid thermal adaptation in photosymbionts of reef-building corals".GLOBAL CHANGE BIOLOGY 23.11(2017). |
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