Endophytic Microbiome in Bioactive Compound Production and Plant Disease Management

Kamat, Siya; Dixit, Ritu B.; Kumari, Madhuree

doi:10.1007/978-3-030-87289-2_4

Cited by 4 publications

(3 citation statements)

References 215 publications

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“…Microbes, especially those found in extreme or unique habitats, hold promise. For instance, fungi from deep-sea environments or bacteria from desert ecosystems might possess unique biochemical pathways that can be leveraged for pest control [48]. The realm of RNA interference (RNAi) offers exciting possibilities.…”

Section: Potential New Biocontrol Agents On the Horizonmentioning

confidence: 99%

A Review on Advances in Biocontrol Techniques for Managing Insect Pests in Sustainable Agriculture

Thilagam,

Sharanappa,

Roy

et al. 2023

IJECC

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Biocontrol techniques represent a vital avenue in the quest for sustainable agricultural practices. This approach, integrating ecological intelligence with modern scientific advancements, is seeing increasing adoption in various regions, notably in India. Drawing inspiration from nature's own mechanisms, biocontrol employs specific organisms or their biological derivatives to manage and mitigate pests, thereby decreasing the dependency on chemical agents. Through an in-depth exploration of biocontrol applications, this study places a special emphasis on India's initiatives and contrasts them with global endeavors. Noteworthy examples include the innovative use of parasitic wasps to combat the papaya mealybug menace in Tamil Nadu, the strategic application of fungi like Trichoderma for disease control in Maharashtra, and the successful introduction of parasitoid wasps to manage olive flies in regions like California. Rooted in foundational ecological principles, these methodologies exhibit potential benefits that span improved crop yields, economic viability, and most importantly, reduced environmental adversities. Effective deployment and scaling of these techniques require an integrated approach, emphasizing collaboration among researchers, farming communities, and industry stakeholders. By presenting a detailed analysis of these synergistic efforts, this review accentuates the transformative potential of biocontrol. As the global community faces the dual challenges of an expanding population and the unpredictable impacts of climate change, the promise of biocontrol looms large, offering a sustainable pathway for the agriculture of the future.

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Section: Potential New Biocontrol Agents On the Horizonmentioning

confidence: 99%

A Review on Advances in Biocontrol Techniques for Managing Insect Pests in Sustainable Agriculture

Thilagam,

Sharanappa,

Roy

et al. 2023

IJECC

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“…Plants produce thousands of active compounds known as secondary metabolites [ 23 ], which [ 24 ] provide an array of benefits, including stimulating immunity and protection from diseases [ 25 ]. Plant health is also influenced by the plant’s native microbiome [ 26 , 27 ]—its collective community of microorganisms. Endophytes are microorganisms (generally bacteria or fungi) that inhabit plant tissue without causing any apparent symptoms or disease [ 24 , 28 , 29 ], and they are most often classified as beneficial symbionts of their host plant.…”

Section: Introductionmentioning

confidence: 99%

Endophytes and Plant Extracts as Potential Antimicrobial Agents against Candidatus Liberibacter Asiaticus, Causal Agent of Huanglongbing

et al. 2023

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Huanglongbing (HLB), also known as citrus greening, is an insidious disease in citrus and has become a threat to the sustainability of the citrus industry worldwide. In the U.S., Candidatus Liberibacter asiaticus (CLas) is the pathogen that is associated with HLB, an unculturable, phloem-limited bacteria, vectored by the Asian Citrus Psyllid (ACP, Diaphorina citri). There is no known cure nor treatment to effectively control HLB, and current control methods are primarily based on the use of insecticides and antibiotics, where effectiveness is limited and may have negative impacts on beneficial and non-target organisms. Thus, there is an urgent need for the development of effective and sustainable treatment options to reduce or eliminate CLas from infected trees. In the present study, we screened citrus-derived endophytes, their cell-free culture supernatants (CFCS), and crude plant extracts for antimicrobial activity against two culturable surrogates of CLas, Sinorhizobium meliloti and Liberibacter crescens. Candidates considered high-potential antimicrobial agents were assessed directly against CLas in vitro, using a propidium monoazide–based assay. As compared to the negative controls, statistically significant reductions of viable CLas cells were observed for each of the five bacterial CFCS. Subsequent 16S rRNA gene sequencing revealed that each of the five bacterial isolates were most closely related to Bacillus amyloliquefaciens, a species dominating the market of biological control products. As such, the aboveground endosphere of asymptomatic survivor citrus trees, grown in an organic orchard, were found to host bacterial endophytes capable of effectively disrupting CLas cell membranes. These results concur with the theory that native members of the citrus microbiome play a role in the development of HLB. Here, we identify five strains of Bacillus amyloliquefaciens demonstrating notable potential to be used as sources of novel antimicrobials for the sustainable management of HLB.

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“…Many diverse natural products of these organisms have been reported, and many more chemically unique compounds are being discovered (Blockley et al 2017). The bacteria perform several roles necessary for the survival of their host, such as providing nutrients like carbon and nitrogen (van de Water et al 2018) and chemical defences that protect the host against colonisation and predation (Krug 2006;Kamat et al 2022). Potent antifouling compounds have been isolated from the bacteria associated with the living surfaces of marine organisms such as soft corals and macroalgae (Satheesh et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Antifouling activity of bacterial extracts associated with soft coral and macroalgae from the Red Sea

Tunkal

Jamal²,

Abdulrahman³

et al. 2022

OandHS

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In marine environments where biofouling occurs and has an impact on the maritime economy and environment, compounds that inhibit the attachment, growth and survival of microorganisms in a biofilm complex as well as settlement of larvae are considered potential antifouling compounds. In this study, the extracellular metabolites from two surface- associated bacteria isolated from soft coral and macroalga were evaluated for antibiofilm and antisettlement activity. The bacteria were identified using 16S rRNA gene sequencing, and the culture supernatant extract of each strain was evaluated for antibiofilm activity. The compounds present in the extracts were analysed using GC-MS. The two bacterial strains were identified as Bacillus licheniformis MBR1 and Vibrio alginolyticus MBR4 for the isolates from soft coral and macroalgae, respectively. The extracts inhibited the growth of biofilm-forming bacteria, biofilm formation and barnacle larval settlement. The GC-MS analysis of the extract detected the presence of compounds such as tetrapentacontane, octadecanoic acid, 2,3-dihydroxypropyl ester, hexadecanoic acid, 2-hydroxy1-(hydroxymethyl) ethyl ester and 17-pentatriacontene. The results of the study show that extracellular metabolites of the bacteria associated with marine organisms could be used as natural antifouling compounds to control biofouling.

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Endophytic Microbiome in Bioactive Compound Production and Plant Disease Management

Cited by 4 publications

References 215 publications

A Review on Advances in Biocontrol Techniques for Managing Insect Pests in Sustainable Agriculture

A Review on Advances in Biocontrol Techniques for Managing Insect Pests in Sustainable Agriculture

Endophytes and Plant Extracts as Potential Antimicrobial Agents against Candidatus Liberibacter Asiaticus, Causal Agent of Huanglongbing

Antifouling activity of bacterial extracts associated with soft coral and macroalgae from the Red Sea

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