chemical mechanisms of disease resistance in hawai’ian corals
DESCRIPTION
Chemical Mechanisms of Disease Resistance in Hawai’ian Corals Deborah Gochfeld 1 , Greta Aeby 2 , Jesse Miller 1 1 National Institute of Undersea Science and Technology, University of Mississippi 2 Hawaii Institute of Marine Biology. Occurrence of infectious disease. Host. Environment. - PowerPoint PPT PresentationTRANSCRIPT
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Chemical Mechanisms of Disease Resistance
in Hawai’ian Corals
Deborah Gochfeld1, Greta Aeby2, Jesse Miller1
1National Institute of Undersea Science and Technology,University of Mississippi
2Hawaii Institute of Marine Biology
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Occurrence of infectious disease
Host
Pathogen
Environment
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Occurrence of infectious disease
Host
Pathogen
Environment
0
0.5
1
1.5
2
2.5
3
3.5
4
Montipora Porites Pocillopora
overall disease prevalence (%)
Mauin=9 sites
Antimicrobial defense
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Occurrence of infectious disease
Host
Pathogen
Environment
00.5
11.5
22.5
33.5
44.5
OlowaluHonolua N
KahekiliKanahena
MolokiniPuamanaMala Wharf
Ma'alaeaSugar Beach
est. prevalence (%)
Antimicrobial defense
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Objectives
1) Assess differences in antimicrobial activity among three dominant Hawai’ian coral genera.
2) Assess population-level variability in antimicrobial activity of common coral species from three different sites.
3) Assess differences in antimicrobial activity and chemical constituents in healthy and diseased colonies of the same species.
Montipora Porites Pocillopora
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General Methods
1) Collect replicate pieces of three common coral genera (Montipora, Pocillopora, Porites) from three sites on Oahu
2) Extract corals is aqueous solvents
3) Test extracts in antimicrobial assays to determine genus- and population-level variability in antimicrobial activity
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BacteriaKnown coral
pathogen
Potential marine
pathogen from human waste
Isolated from surfaces of Hawaiian
corals
Aurantimonas coralicida X
Vibrio corallyticus X
Vibrio shiloi X X
Serratia marcescens X X
Clostridium perfringens X
Yersinia enterocolitica X X
Pseudomonas nautica X
Vibrio agarivorans X
Klebsiella pneumoniae X
Species of bacteria used to test coral extracts
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Progress Since May
• Collected replicate corals from three sites around Oahu: Waianae, Maile Beach, Kaneohe Bay
• Extracted corals for assays•Porites lobata (n=5 from each of 3 sites)•Pocillopora meandrina (n=5 from each of 3 sites)•Montipora capitata (n=5 from each of 3 sites)
• Collected and extracted healthy and diseased tissues from diseased Montipora capitata from Kaneohe Bay, along with healthy neighbor controls (n=5 of each)
• Performed growth inhibition assay of all aqueous extracts from Porites lobata and Pocillopora meandrina against 9 bacterial strains.
• Performed growth inhibition assay on extracts from healthy, diseased and control Montipora capitata from Kaneohe Bay to determine whether further chemical fingerprinting is warranted
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Objectives
1) Assess differences in antimicrobial activity among dominant Hawai’ian coral genera.
2) Assess population-level variability in antimicrobial activity of common coral species from different sites.
3) Assess differences in antimicrobial activity and chemical constituents in healthy and diseased colonies of the same species.
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Anti-microbial activity of Hawaiian reef corals
0
20
40
60
80
100
A. coralicidaV. corallyticus
V. shiloi
S. marcescensY. enterocolitica
C. perfringensP. nautica
V. agarivoransK. pneumoniaebacterial species
proportion of colonies w/ antimicrobial activity(%)
P. lobataN=15
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Anti-microbial activity of Hawaiian reef corals
0
20
40
60
80
100
A. coralicidaV. corallyticus
V. shiloi
S. marcescensY. enterocolitica
C. perfringensP. nautica
V. agarivoransK. pneumoniae
bacterial species
proportion of colonies w/ antimicrobial
activity (%)
P. meandrina N=15
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Intraspecific variability in antimicrobial activity
Bacteria P. lobata(n=15)
Aurantimonas coralicida -12Vibrio corallyticus -10/+3Vibrio shiloi -5/+3Serratia marcescens -15Yersinia enterocolitica -10Clostridium perfringens -14Pseudomonas nautica +13Vibrio agarivorans -15Klebsiella pneumoniae -1/+3
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Intraspecific variability in antimicrobial activity
Bacteria P. lobata P. meandrina(n=15) (n=15)
Aurantimonas coralicida -12 -9/+2Vibrio corallyticus -10/+3 -6/+1Vibrio shiloi -5/+3 -1/+8Serratia marcescens -15 -11/+1Yersinia enterocolitica -10 -13/+1Clostridium perfringens -14 -14/+1Pseudomonas nautica +13 -1/+11Vibrio agarivorans -15 -11/+2Klebsiella pneumoniae -1/+3 -3/+11
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Intraspecific variability in disease resistance in corals
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Objectives
1) Assess differences in antimicrobial activity among dominant Hawai’ian coral genera.
2) Assess population-level variability in antimicrobial activity of common coral species from different sites.
3) Assess differences in antimicrobial activity and chemical constituents in healthy and diseased colonies of the same species.
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Site differences in antimicrobial activity of corals
Porites lobata
Bacteria Waianae Maile Beach Kaneohe Bay
Aurantimonas coralicida -3 -4 -5Vibrio corallyticus +3 -5 -5Vibrio shiloi -3/+1 -1/+1 -1/+1Serratia marcescens -5 -5 -5Yersinia enterocolitica -5 -5 0Clostridium perfringens -4 -5 -5Pseudomonas nautica +5 +3 +5Vibrio agarivorans -5 -5 -5Klebsiella pneumoniae +2 -1 +1
antimicrobial activity (%) 55.6 68.9 57.8
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Site differences in antimicrobial activity of corals
Pocillopora meandrina
Bacteria Waianae Maile Beach Kaneohe Bay
Aurantimonas coralicida -2/+1 -4 -3/+1Vibrio corallyticus -5 +4 -1Vibrio shiloi -1/+3 +5 0Serratia marcescens -3 -5 -3/+1Yersinia enterocolitica -5 -5 -3/+1Clostridium perfringens -5 -5 -4/+1Pseudomonas nautica -1/+2 +5 +4Vibrio agarivorans -4 -2/+2 -5Klebsiella pneumoniae -2/+3 -1/+3 +5
antimicrobial activity (%) 62.2 48.9 42.2
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Site differences in antimicrobial activity of corals Pocillopora meandrina
Bacteria Waianae Maile Beach Kaneohe Bay
Aurantimonas coralicida -2/+1 -4 -3/+1Vibrio corallyticus -5 +4 -1Vibrio shiloi -1/+3 +5 0Serratia marcescens -3 -5 -3/+1Yersinia enterocolitica -5 -5 -3/+1Clostridium perfringens -5 -5 -4/+1Pseudomonas nautica -1/+2 +5 +4Vibrio agarivorans -4 -2/+2 -5Klebsiella pneumoniae -2/+3 -1/+3 +5
00.5
11.5
22.5
33.5
44.5
OlowaluHonolua N
KahekiliKanahena
MolokiniPuamanaMala Wharf
Ma'alaeaSugar Beach
est. prevalence (%)
land based pollution stress defensenovel pathogens
water flow inoculumsrepetitive exposure increased water temperature
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Objectives
1) Assess differences in antimicrobial activity among dominant Hawai’ian coral genera.
2) Assess population-level variability in antimicrobial activity of common coral species from different sites.
3) Assess differences in antimicrobial activity and chemical constituents in healthy and diseased colonies of the same species.
Montipora white syndrome
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Montipora white syndrome
Comparison of antimicrobial activity in healthy vs. diseased colonies
Healthy neighbor
Higher levels of antimicrobials?Induced defenses?
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Effect of extracts from healthy & diseasedMontipora capitata on growth of bacteria
M. capitata
Bacteria control normal affected
Aurantimonas coralicida -4 -3 -4Vibrio corallyticus
Vibrio shiloi -5 -4 -4Serratia marcescens
Yersinia enterocolitica
Clostridium perfringens -5 -5 -3Pseudomonas nautica -5 -3 -5Vibrio agarivorans -5 -3 -3Klebsiella pneumoniae
antimicrobial activity (%) 96 72 76
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Conclusions
Host
Pathogen
Environment
Broad spectrum antimicrobial activity
Intraspecific variability Differences within coral species among sites
Differences between healthy and diseased colony
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Acknowledgements
Collections(Hawaii Institute of Marine Biology)
Megan Colwin Lian ZigtermanCasper Lazet
Sample Processing and Assays(University of Mississippi)
Shellie BaileyAmy KatzenmeyerLauren Wheeler