The genetics of colony form and function in Caribbean Acropora corals

BMC Genomics

Steven V Vollmer¹  Stefan T Kaluziak¹  Elizabeth M Hemond¹ 

[1] Northeastern University, Marine Science Center, Nahant, MA, USA

关键词: RNA-seq;    Gene expression;    Cnidaria;    Acropora;    Coral Reefs;   

Others  :  1125738
DOI  :  10.1186/1471-2164-15-1133

 received in 2014-06-23, accepted in 2014-12-11,  发布年份 2014

【 摘 要 】

Background

Colonial reef-building corals have evolved a broad spectrum of colony morphologies based on coordinated asexual reproduction of polyps on a secreted calcium carbonate skeleton. Though cnidarians have been shown to possess and use similar developmental genes to bilaterians during larval development and polyp formation, little is known about genetic regulation of colony morphology in hard corals. We used RNA-seq to evaluate transcriptomic differences between functionally distinct regions of the coral (apical branch tips and branch bases) in two species of Caribbean Acropora, the staghorn coral, A. cervicornis, and the elkhorn coral, A. palmata.

Results

Transcriptome-wide gene profiles differed significantly between different parts of the coral colony as well as between species. Genes showing differential expression between branch tips and bases were involved in developmental signaling pathways, such as Wnt, Notch, and BMP, as well as pH regulation, ion transport, extracellular matrix production and other processes. Differences both within colonies and between species identify a relatively small number of genes that may contribute to the distinct “staghorn” versus “elkhorn” morphologies of these two sister species.

Conclusions

The large number of differentially expressed genes supports a strong division of labor between coral branch tips and branch bases. Genes involved in growth of mature Acropora colonies include the classical signaling pathways associated with development of cnidarian larvae and polyps as well as morphological determination in higher metazoans.

【 授权许可】

   
2014 Hemond et al.; licensee BioMed Central.

【 图 表 】

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