Host-Microbiota Interactions and Their Importance in Promoting Growth and Resistance to Opportunistic Diseases in Salmonids

Gauthier, Jeff; Lavoie, Camille; Charette, Steve J.; Derôme, Nicolas

doi:10.1007/978-3-030-16190-3_2

Cited by 6 publications

(4 citation statements)

References 116 publications

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“…These topological features showed that L1 has a more stable and complex ecological network, consistent with previous ndings [48]. In the co-occurrence network, the negative correlation may be associated with higher indices of ecological disorders [49] and competition between microorganisms [48], while the positive correlation indicates that there were less competitive interactions and more mutual bene ts [50]. The number of edge connections, the proportion of positive correlation, and the average degree of fungal network showed a downward trend rst and then an upward trend, and the proportion of negative correlation was small.…”

Section: Discussionsupporting

confidence: 90%

Powdery mildew-induced changes in phyllosphere microbial community dynamics of cucumber

Yue

Tan

et al. 2022

Preprint

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As an important habitat for microorganisms, the phyllosphere has an important impact on plant health and growth. The changes of the phyllosphere microorganisms are closely related to the occurrence of leaf diseases. However, little is known about how the microbial community changes in the phyllosphere under the infection of pathogen. Here, we analyzed the microbial communities in the phyllosphere at different disease levels (L1 ≤ 10%, 30% ≤ L2 < 50%, and L3 ≥ 50%) to explore the dynamic changes of the phyllosphere microorganisms. The analysis showed that bacterial microbial community diversity increased with disease severity and fungal diversity gradually decreased. There were no significant differences in the community structure and composition of phyllosphere microorganisms at different levels of incidence, the relative abundance of species changed significantly. The relative abundance of rosenbergiella, rickettsia and cladosporium was negatively correlated with the severity of the disease, while bacillus, pantoea, kocuria and podosphaera were positively correlated with the severity of the disease. Co-occurrence network showed that both fungal and bacterial communities L1 have relatively stable and complex ecological networks. The bacterial network tends to be unstable with the increase in disease degree, and the fungal network gradually stabilizes. These studies showed that the severity of the disease will have a certain impact on the phyllosphere microbial community, which provides a new reference for cucumber powdery mildew control from a microbial perspective.

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Section: Discussionsupporting

confidence: 90%

Powdery mildew-induced changes in phyllosphere microbial community dynamics of cucumber

Yue

Tan

et al. 2022

Preprint

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“…The gastrointestinal (GI) tract is also an important site for infections ( Xiong et al, 2019 ) and in that respect the GI microbiome is a potential biomarker for stress ( Perry et al, 2020 ). Therefore, a better understanding of the host-microbiota interactions is essential to maintain fish health in the long term ( Gauthier et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Relationship between gut microbiota and Chinook salmon (Oncorhynchus tshawytscha) health and growth performance in freshwater recirculating aquaculture systems

et al. 2023

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Gut microbiota play important roles in fish health and growth performance and the microbiome in fish has been shown to be a biomarker for stress. In this study, we surveyed the change of Chinook salmon (Oncorhynchus tshawytscha) gut and water microbiota in freshwater recirculating aquaculture systems (RAS) for 7 months and evaluated how gut microbial communities were influenced by fish health and growth performance. The gut microbial diversity significantly increased in parallel with the growth of the fish. The dominant gut microbiota shifted from a predominance of Firmicutes to Proteobacteria, while Proteobacteria constantly dominated the water microbiota. Photobacterium sp. was persistently the major gut microbial community member during the whole experiment and was identified as the core gut microbiota for freshwater farmed Chinook salmon. No significant variation in gut microbial diversity and composition was observed among fish with different growth performance. At the end of the trial, 36 out of 78 fish had fluid in their swim bladders. These fish had gut microbiomes containing elevated proportions of Enterococcus, Stenotrophomonas, Aeromonas, and Raoultella. Our study supports the growing body of knowledge about the beneficial microbiota associated with modern salmon aquaculture systems and provides additional information on possible links between dysbiosis and gut microbiota for Chinook salmon.

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“…These topological features showed that L1 has a more stable and complex ecological network, consistent with previous findings (Zhang et al 2018 ). The high negative correlation index in co-occurrence networks is associated with ecological imbalances and competition between microorganisms (Gauthier et al 2019 ), while the high positive correlation index indicates that there were less competitive interactions and more mutual benefits (Zhang et al 2022 ). The number of edge connections, the proportion of positive correlations, and the average degree of fungal network showed first a downward and then increased trend, while the bacterial network showed a downward trend from L2 to L3.…”

Section: Discussionmentioning

confidence: 99%

Powdery mildew-induced changes in phyllosphere microbial community dynamics of cucumber

Yue,

Du,

Wang

et al. 2024

FEMS Microbiology Ecology

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As an important habitat for microorganisms, the phyllosphere has a great impact on plant growth and health, and changes in phyllosphere microorganisms are closely related to the occurrence of leaf diseases. However, there remains a limited understanding regarding alterations to the microbial community in the phyllosphere resulting from pathogen infections. Here, we analyzed and compared the differences in phyllosphere microorganisms of powdery mildew cucumber from three disease severity levels (0% < L1 < 30%, 30% ≤ L2 < 50%, L3 ≥ 50%, the number represents the lesion coverage rate of powdery mildew on leaves). There were significant differences in α diversity and community structure of phyllosphere communities under different disease levels. Disease severity altered the community structure of phyllosphere microorganisms, Rosenbergiella, Rickettsia, and Cladosporium accounted for the largest proportion in the L1 disease grade, while Bacillus, Pantoea, Kocuria, and Podosphaera had the highest relative abundance in the L3 disease grade. The co-occurrence network analysis of the phyllosphere microbial community indicated that the phyllosphere bacterial community was most affected by the severity of disease. Our results suggested that with the development of cucumber powdery mildew, the symbiotic relationship between species was broken, and the entire bacterial community tended to compete.

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Host-Microbiota Interactions and Their Importance in Promoting Growth and Resistance to Opportunistic Diseases in Salmonids

Cited by 6 publications

References 116 publications

Powdery mildew-induced changes in phyllosphere microbial community dynamics of cucumber

Powdery mildew-induced changes in phyllosphere microbial community dynamics of cucumber

Relationship between gut microbiota and Chinook salmon (Oncorhynchus tshawytscha) health and growth performance in freshwater recirculating aquaculture systems

Powdery mildew-induced changes in phyllosphere microbial community dynamics of cucumber

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