Plant-microbe interactions for the sustainable agriculture and food security

Sharma, Pinki; Kumar, Tarun; Yadav, Monika; Gill, Sarvajeet Singh; Chauhan, Nar Singh

doi:10.1016/j.plgene.2021.100325

Cited by 36 publications

(5 citation statements)

References 184 publications

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“…In the chronological order of aggregate formation, organic gluing agents derived from microbes are needed to initiate the aggregation process (Amelung et al., 2023). Members of most genera that were prominently present in all three OM treatments (Table 2) have the potential to secrete EPSs, including Bacillus , Pseudomonas (Roberson & Firestone, 1992), Weissella (Fusco et al., 2015; Teixeira et al., 2021), Flavobacteria (Zhang et al., 2015), Rhizobiaceae (Becker & Pühler, 1998), Enterobacteriaceae (Hua et al., 2010), Sphingomonas (Koutinas et al., 2019), Paenibacillus (Grady et al., 2016), Bosea (Lu et al., 2017), Stenotrophomonas (Caesar‐TonThat et al., 2013), Pedobacter (Sharma, Kumar, et al., 2021), and Sphingopyxis (Sharma, Khurana, et al., 2021). EPS is known as important gluing agent for soil aggregates (Totsche et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

Organic matter type and soil texture shape prokaryotic communities during early‐stage soil structure formation

Yao,

Bucka,

Kögel‐Knabner

et al. 2023

J. Plant Nutr. Soil Sci.

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BackgroundOrganic matter (OM) serves as substrate for heterotrophic microbial growth. Soil structure supports microbial life by providing various niches for colonization. Microorganisms in turn contribute to soil structure formation.AimsWe aim to understand how OM of different origin and soil texture affect prokaryotic community structure and the implications on early‐stage soil structure formation.MethodsAn artificial soil incubation experiment was conducted with different types of OM, including bacterial necromass and particulate organic matter (POM) of larger or smaller size (sPOM). The mineral composition was modified to obtain a clay loam, loam, and sandy loam texture. The abundance and composition of a natural microbial inoculum were determined after 30 days of incubation by real‐time PCR and 16S rRNA gene sequencing, respectively.ResultsThe different OM types had a stronger effect on the prokaryotic community structure and abundance than texture. The necromass treatment supported the most distinct prokaryotic community with the highest abundance and lowest diversity, as well as the most intense formation of water‐stable microaggregates in comparison to POM and sPOM treatments. Abundant bacterial taxa in all treatments are known to include extracellular polymeric substance producers, indicating that functional redundancy warrants aggregation by gluing agents. Texture‐related effects were most consistent in the POM treatment, where larger prokaryotic populations were observed in the coarser‐textured soils with fewer but larger soil pores and lower soil water content.ConclusionsDifferences in prokaryotic community structure and abundance due to OM source indicate that aggregation is dependent on different ecological strategists, a POM‐degrading population that promotes aggregation and contributes to necromass formation, and a necromass‐degrading consortium in which bacteria play a major role.

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Section: Discussionmentioning

confidence: 99%

Organic matter type and soil texture shape prokaryotic communities during early‐stage soil structure formation

Yao,

Bucka,

Kögel‐Knabner

et al. 2023

J. Plant Nutr. Soil Sci.

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“…Interestingly, plant-colonizing methylotrophs of the genus Methylobacterium were capable of delivering insecticidal proteins and have been associated with the plant protective properties of the common biocontrol agent Bacillus thuringiensis [62]. Moreover, volatiles such as methanol promote the growth of the phyllosphere microbiota [63], serving as an energy source for methylotrophic epiphytes [64]. Thus, both methanol concentration and co-evolution of honeybees with their plant hosts and phyllosphere microbiota appear to shape methylotrophic communities in honey.…”

Section: Figurementioning

confidence: 99%

Microbial Community Structure among Honey Samples of Different Pollen Origin

et al. 2023

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Honey’s antibacterial activity has been recently linked to the inhibitory effects of honey microbiota against a range of foodborne and human pathogens. In the current study, the microbial community structure of honey samples exerting pronounced antimicrobial activity was examined. The honey samples were obtained from different geographical locations in Greece and had diverse pollen origin (fir, cotton, fir–oak, and Arbutus unedo honeys). Identification of honey microbiota was performed by high-throughput amplicon sequencing analysis, detecting 335 distinct taxa in the analyzed samples. Regarding ecological indices, the fir and cotton honeys possessed greater diversity than the fir–oak and Arbutus unedo ones. Lactobacillus kunkeei (basionym of Apilactobacillus kun-keei) was the predominant taxon in the fir honey examined. Lactobacillus spp. appeared to be favored in honey from fir-originated pollen and nectar since lactobacilli were more pronounced in fir compared to fir–oak honey. Pseudomonas, Streptococcus, Lysobacter and Meiothermus were the predominant taxa in cotton honey, whereas Lonsdalea, the causing agent of acute oak decline, and Zymobacter, an osmotolerant facultative anaerobic fermenter, were the dominant taxa in fir–oak honey. Moreover, methylotrophic bacteria represented 1.3–3% of the total relative abundance, independently of the geographical and pollen origin, indicating that methylotrophy plays an important role in honeybee ecology and functionality. A total of 14 taxa were identified in all examined honey samples, including bacilli/anoxybacilli, paracocci, lysobacters, pseudomonads, and sphingomonads. It is concluded that microbial constituents of the honey samples examined were native gut microbiota of melliferous bees and microbiota of their flowering plants, including both beneficial bacteria, such as potential probiotic strains, and animal and plant pathogens, e.g., Staphylococcus spp. and Lonsdalea spp. Further experimentation will elucidate aspects of potential application of microbial bioindicators in identifying the authenticity of honey and honeybee-derived products.

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“…The scientific approaches to the study of plant-fungal interactions are becoming interesting in modern agriculture with prospects to ensure food security and zero malnutrition among the world populace (Sharma et al 2021). In recent times, a higher world population index by 2050 has been envisaged with emphasis and recommendations on the use of biological approaches in tackling food demand pressure, food insecurity, and future food scarcity (Sahu and Mishra 2021).…”

Section: Introductionmentioning

confidence: 99%

Biocontrol mechanisms of endophytic fungi

Adeleke

Ayilara

Akinola

et al. 2022

Egypt J Biol Pest Control

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Background Scientific approaches into modern agricultural systems, as opposed to the use of synthetic pesticides in food production, became important by exploring endophytic fungi capable of protecting plants against pathogens for maximum crop productivity. Main body Diverse endophytic microbes colonizing the internal tissue of plants exhibit beneficial and pathological effects on plants. The beneficial endophytic fungi assisted plants in the control of pathogenic endophytic fungi in plants due to their ability to directly or indirectly promote plant health. Inefficient agricultural practices and environmental factors contribute to the disease emergence in plants. Endophytic fungi employed diverse mechanisms in phytopathogen control by activating and inducing plant resistance through gene expression, synthesis of fungi-derived metabolite compounds, and hormonal signaling molecules. The mutual coexistence between endophytic fungi and host plants remains an important mechanism in disease suppression. An in-depth understanding and selection of beneficial endophytic fungi and interaction between pathogens and host plants are important in managing challenges associated with the endophyte biocontrol mechanisms. Conclusion Research findings on the use of endophytic fungi as bioinoculants are advancing, and understanding endophytic fungi antibiosis action through the synthesis of biocontrol agents (BCAs) can, however, be explored in integrated plant disease management. Therefore, in this review, the biocontrol mechanism of endophytic fungi against plant pathogens was highlighted.

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Plant-microbe interactions for the sustainable agriculture and food security

Cited by 36 publications

References 184 publications

Organic matter type and soil texture shape prokaryotic communities during early‐stage soil structure formation

Organic matter type and soil texture shape prokaryotic communities during early‐stage soil structure formation

Microbial Community Structure among Honey Samples of Different Pollen Origin

Biocontrol mechanisms of endophytic fungi

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