PMID- 27688961 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20161005 LR - 20201001 IS - 2167-8359 (Print) IS - 2167-8359 (Electronic) IS - 2167-8359 (Linking) VI - 4 DP - 2016 TI - In situ visualization of bacterial populations in coral tissues: pitfalls and solutions. PG - e2424 LID - 10.7717/peerj.2424 [doi] LID - e2424 AB - In situ visualization of microbial communities within their natural habitats provides a powerful approach to explore complex interactions between microorganisms and their macroscopic hosts. Specifically, the application of fluorescence in situ hybridization (FISH) to simultaneously identify and visualize diverse microbial taxa associated with coral hosts, including symbiotic algae (Symbiodinium), Bacteria, Archaea, Fungi and protists, could help untangle the structure and function of these diverse taxa within the coral holobiont. However, the application of FISH approaches to coral samples is constrained by non-specific binding of targeted rRNA probes to cellular structures within the coral animal tissues (including nematocysts, spirocysts, granular gland cells within the gastrodermis and cnidoglandular bands of mesenterial filaments). This issue, combined with high auto-fluorescence of both host tissues and endosymbiotic dinoflagellates (Symbiodinium), make FISH approaches for analyses of coral tissues challenging. Here we outline the major pitfalls associated with applying FISH to coral samples and describe approaches to overcome these challenges. FAU - Wada, Naohisa AU - Wada N AD - Department of Marine Science and Resources, College of Bioresource Science, Nihon University, Fujisawa, Kanagawa, Japan; Australian Institute of Marine Science, Townsville, Queensland, Australia; AIMS@JCU, Townsville, Queensland, Australia. FAU - Pollock, Frederic J AU - Pollock FJ AD - Australian Institute of Marine Science, Townsville, Queensland, Australia; AIMS@JCU, Townsville, Queensland, Australia; Department of Biology, Eberly College of Science, Pennsylvania State University, University Park, PA, United States; ARC Centre of Excellence for Coral Reef Studies, James Cook University of North Queensland, Townsville, Queensland, Australia; College of Science and Engineering, James Cook University of North Queensland, Townsville, Queensland, Australia. FAU - Willis, Bette L AU - Willis BL AD - AIMS@JCU, Townsville, Queensland, Australia; ARC Centre of Excellence for Coral Reef Studies, James Cook University of North Queensland, Townsville, Queensland, Australia; College of Science and Engineering, James Cook University of North Queensland, Townsville, Queensland, Australia. FAU - Ainsworth, Tracy AU - Ainsworth T AD - ARC Centre of Excellence for Coral Reef Studies, James Cook University of North Queensland , Townsville , Queensland , Australia. FAU - Mano, Nobuhiro AU - Mano N AD - Department of Marine Science and Resources, College of Bioresource Science, Nihon University , Fujisawa , Kanagawa , Japan. FAU - Bourne, David G AU - Bourne DG AD - Australian Institute of Marine Science, Townsville, Queensland, Australia; AIMS@JCU, Townsville, Queensland, Australia; College of Science and Engineering, James Cook University of North Queensland, Townsville, Queensland, Australia. LA - eng PT - Journal Article DEP - 20160920 PL - United States TA - PeerJ JT - PeerJ JID - 101603425 PMC - PMC5036075 OTO - NOTNLM OT - Bacteria OT - Coral OT - Fluorescence in situ hybridization OT - Holobiont OT - In situ visualization COIS- The authors declare there are no competing interests. EDAT- 2016/10/01 06:00 MHDA- 2016/10/01 06:01 PMCR- 2016/09/20 CRDT- 2016/10/01 06:00 PHST- 2016/06/03 00:00 [received] PHST- 2016/08/09 00:00 [accepted] PHST- 2016/10/01 06:00 [entrez] PHST- 2016/10/01 06:00 [pubmed] PHST- 2016/10/01 06:01 [medline] PHST- 2016/09/20 00:00 [pmc-release] AID - 2424 [pii] AID - 10.7717/peerj.2424 [doi] PST - epublish SO - PeerJ. 2016 Sep 20;4:e2424. doi: 10.7717/peerj.2424. eCollection 2016.