Control Effects on Litchi Downy Blight Disease by Endophytic Bacterial Strain Tb2 and Its Pathogenesis-Related Proteins

Cai, XiaoLin; Lin, Nuoqiao; Chen, W.; Hu, F.-P.

doi:10.17660/actahortic.2010.863.89

Cited by 14 publications

(6 citation statements)

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“…Benhamou et al (1998) [159] showed that the endophytic strain Bacillus pumilus SE34 triggered ISR in tomato plants, with the elaboration of structural barriers, and production of toxic substances such as phenolic compounds and β-1,3-glucanases. The production of these PR proteins was demonstrated for the disease control exerted by B. amyloliquefaciens strain TB2 on litchi downy blight disease caused by Peronophthora litchi [156]. In addition, in another study, the endophytic actinobacteria isolated from wheat tissues showed an upregulation of PR-1, PR-4, PDF1.2, and HEL defense genes in response to Erwinia carotovora subsp.…”

Section: Induction Of Pathogenesis-related Proteins (Prs) and Antioxidant Enzymesmentioning

confidence: 88%

“…Pathogenesis-related proteins (PRs) are well-known for their role in acquired resistance and their induction, triggered by necrotic lesions in plants [154,155]. Different studies evidence the ability of some bacterial endophytic strains to also induce PR activity and eventually increase resistance against a wide range of pathogens [156][157][158]. Among them, β-1,3-glucanases and chitinases (PR-2 and PR-3 families, respectively) are the best described [143].…”

Section: Induction Of Pathogenesis-related Proteins (Prs) and Antioxidant Enzymesmentioning

confidence: 99%

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Bacterial Endophytes: The Hidden Actor in Plant Immune Responses against Biotic Stress

Oukala

Aissat

Pastor

2021

Plants

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Bacterial endophytes constitute an essential part of the plant microbiome and are described to promote plant health by different mechanisms. The close interaction with the host leads to important changes in the physiology of the plant. Although beneficial bacteria use the same entrance strategies as bacterial pathogens to colonize and enter the inner plant tissues, the host develops strategies to select and allow the entrance to specific genera of bacteria. In addition, endophytes may modify their own genome to adapt or avoid the defense machinery of the host. The present review gives an overview about bacterial endophytes inhabiting the phytosphere, their diversity, and the interaction with the host. Direct and indirect defenses promoted by the plant–endophyte symbiont exert an important role in controlling plant defenses against different stresses, and here, more specifically, is discussed the role against biotic stress. Defenses that should be considered are the emission of volatiles or antibiotic compounds, but also the induction of basal defenses and boosting plant immunity by priming defenses. The primed defenses may encompass pathogenesis-related protein genes (PR family), antioxidant enzymes, or changes in the secondary metabolism.

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Section: Induction Of Pathogenesis-related Proteins (Prs) and Antioxidant Enzymesmentioning

confidence: 88%

Section: Induction Of Pathogenesis-related Proteins (Prs) and Antioxidant Enzymesmentioning

confidence: 99%

Bacterial Endophytes: The Hidden Actor in Plant Immune Responses against Biotic Stress

Oukala

Aissat

Pastor

2021

Plants

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“…‘Feizixiao’ and ‘Huaizhi’ ( Figure 3 ). Cai et al (2008) and Wu et al (2017) reported that effective BCAs can colonize the epidermal cells of litchi fruit and observed that the extent of colonization positively correlates with their preservation effects. Strain SI17 performed better in FLTs than in LTs ( Figure 1 ; Supplementary Table S2 ), perhaps due to better colonization in cv.…”

Section: Discussionmentioning

confidence: 99%

Biological control agents colonize litchi fruit during storage and stimulate physiological responses to delay pericarp browning

Zheng

Huang²,

Huang³

et al. 2023

Front. Microbiol.

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IntroductionLitchi is an economically important fruit in subtropical countries, but pericarp browning can limit its shelf life outside of controlled storage conditions. Effective and sustainable biological control strategies are needed to protect fruit against postharvest browning.Results and DiscussionIn this study, we show that the four bacterial strains Bacillus licheniformis HS10, B. amyloliquefaciens LI24 and PP19, and Exiguobacterium acetylicum SI17 can delay fruit browning in both laboratory trials (LTs) and field plus laboratory trials (FLTs). Strains HS10, LI24, PP19 and SI17 showed 47.74%, 35.39%, 33.58% and 32.53% browning-inhibitory efficacy respectively at 180 h in LT. Litchi sarcocarp interior sourced isolate SI17 showed 74.05% inhibit-brown efficacy at 216 h in FLTs, performing better in FLT than in LT. Furthermore, strains PP19 and SI17 colonized the fruit pericarp and increased total phenolic and anthocyanin contents but decreased peroxidase and polyphenol oxidase activity. This is the first report of E. acetylicum (SI17) and B. licheniformis (HS10) strains acting as biological control agents (BCAs) to delay postharvest browning in litchi fruit. We conclude that PP19 and SI17 are promising BCAs against fruit browning, and their application could be effective for prolonging the shelf life of harvested litchi fruit.

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“…[156] showed that the endophytic strain Bacillus pumilus SE34 triggered ISR in tomato plants by a sequence of steps starting with the elaboration of structural barriers, and production of toxic substances such as phenolic compounds and β-1,3-glucanases. The endophytic bacteria B. amyloliquefaciens strain TB2 showed an excellent control effect on litchi downy blight disease caused by Peronophthora litchi through the production of 1,3glucanase and chitinase [153]. In another study, the endophytic actinobacteria isolated from wheat tissues up-regulates defense genes like PR-1 and PR-4 as well as PDF1.2 and Hel genes of the jasmonic acid/ethylene (JA/ET) pathway in Arabidopsis thaliana in response to Erwinia carotovora subsp.…”

Section: Induction Of Pathogenesis-related Proteins (Prs) and Antioxidant Enzymesmentioning

confidence: 98%

“…Pathogenesis-related proteins (PRs) are well known for their role in acquired resistance that is induced in association with necrotic lesions in plants [151,152]. Different studies evidenced the ability of some bacterial endophytic strains also to induce PR activity and eventually increase resistance against a wide range of pathogens [153][154][155]. Among them, β-1,3-glucanases (PR-2 family) and chitinases (PR-3 family) are the most described [140].…”

Section: Induction Of Pathogenesis-related Proteins (Prs) and Antioxidant Enzymesmentioning

confidence: 99%

Bacterial Endophytes: The Hidden Actor in Plant Immune Responses Against Biotic Stress

Oukala¹,

Aissat²,

Pastor³

2021

Preprint

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Bacterial endophytes interact closely with plant tissues and constitute an essential part of the plant microbiome. These interactions can promote plant growth and elicit specific defense responses against abiotic stresses and pathogen attacks. In this paper, we review the role of endophytic bacteria in modulating defenses of the host rendering the entire plant more resistant to pathogens and pests. The endophyte-induced resistance will probably introduce a new factor when consid-ering plant-pathogen interactions. The impact of the bacterial endosymbionts on the host leading to the priming state is also discussed since it confers a specific adaptation of the plant to the biotic threat.

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Control Effects on Litchi Downy Blight Disease by Endophytic Bacterial Strain Tb2 and Its Pathogenesis-Related Proteins

Cited by 14 publications

References 0 publications

Bacterial Endophytes: The Hidden Actor in Plant Immune Responses against Biotic Stress

Bacterial Endophytes: The Hidden Actor in Plant Immune Responses against Biotic Stress

Biological control agents colonize litchi fruit during storage and stimulate physiological responses to delay pericarp browning

Bacterial Endophytes: The Hidden Actor in Plant Immune Responses Against Biotic Stress

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