Plant growth promoting microbes: a future trend for environmental sustainability

Chennappa, G.; Naik, M. K.; Udaykumar, Nidoni; Vidya, Meesala Sree; Sreenivasa, M. Y.; Amaresh, Y. S.; Mathad, P. F.

doi:10.1016/b978-0-12-818258-1.00010-8

Cited by 7 publications

(6 citation statements)

References 88 publications

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“…Siderophores are a group of small molecules characterized by a strong affinity towards Fe 3+ and are among the strongest Fe-chelating agents in nature. Plants (Poaceae), fungi and bacteria are able to synthesize and release these compounds to enhance the Fe assimilation in Fe-deficiency conditions (Chennappa et al, 2019). Accordingly, one would expect siderophores to be released by the aforementioned organisms to enhance the Fe assimilation especially during the first stages of the degradation where the Fe concentrations are lower when compared with the oldest fractions.…”

Section: Ce Anomalies In Leachatesmentioning

confidence: 99%

Dynamics of rare earth elements and associated major and trace elements during Douglas-fir (Pseudotsuga menziesii) and European beech (Fagus sylvaticaL.) litter degradation

et al. 2022

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Abstract. Given the diverse physico-chemical properties of elements, we hypothesize that their incoherent distribution across the leaf tissues, combined with the distinct resistance to degradation that each tissue exhibits, leads to different turnover rates among elements. Moreover, litter layers of varying ages produce diverse chemical signatures in solution during the wet degradation. To verify our hypothesis, Na, K, Mg, Mn, Ca, Pb, Al and Fe were analysed together with the rare earth elements (REE) in the solid fractions and in the respective leachates of fresh leaves and different litter layers of two forested soils developed under Pseudotsuga menziesii and Fagus sylvatica L. trees. The results from the leaching experiment were also compared with the in situ REE composition of the soil solutions to clarify the impact that the litter degradation processes may have on soil solution chemical composition. Both tree species showed similar biogeochemical processes dominating the element dynamics during litter degradation. REE, Al, Fe and Pb were preferentially retained in the solid litter material, in comparison with the other cations, and their concentrations increased over time during the degradation. Accordingly, different litter fractions produced different yields of elements and REE patterns in the leachates, indicating that the tree species and the age of the litter play a role in the chemical release during degradation. In particular, the evolution of the REE patterns, relative to the age of the litter layers, allowed us to deliver new findings on REE fractionation and mobilization during litter decay. Specifically, the degradation of the litter was characterized by a decrease in the Y/Ho ratio and an increase in the LaN/YbN ratio. The relationship between these ratios provided information on the litter species-specific resistance to degradation, with Douglas-fir litter material showing a lower resistance. During the litter degradation of the two tree species, two main differences were highlighted with the help of the REE: (i) in Pseudotsuga menziesii the behaviour of Eu appeared to be linked to Ca during leaf senescence and (ii) species-specific release of organic acids during litter degradation leads to a more pronounced middle REE (MREE) enrichment in the Fagus sylvatica leachates. Finally, we showed the primary control effect that white fungi may have in Ce enrichment of soil solutions, which appears to be associated with the dissolution and/or direct transport of Ce-enriched MnO2 accumulated on the surface of the old litter due to the metabolic functioning of these microorganisms. Similar MREE and heavy REE (HREE) enrichments were also found in the leachates and the soil solutions, probably due to the higher affinity of these elements for the organic acids, which represent the primary products of organic matter degradation.

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Section: Ce Anomalies In Leachatesmentioning

confidence: 99%

Dynamics of rare earth elements and associated major and trace elements during Douglas-fir (Pseudotsuga menziesii) and European beech (Fagus sylvaticaL.) litter degradation

et al. 2022

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“…One of the control efforts that can be carried out is utilizing plant growth-promoting microorganism (PGPM), such as, mycorrhizae, Trichoderma sp., Pseudomonas sp., and Bacillus sp. [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Double action plant growth promotion microorganisms in suppressing Fusarium wilt disease and increase tomato production

Edy,

Arsih,

Panggeso

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Fusarium oxysporum f.sp lycopersici is a fungus that causes wilt disease in tomatoes, attacking nurseries to mature plants. This study aims to examine several plant growth-promoting microorganisms (PGPM) to control Fusarium wilt and increase tomato production. The study was designed with a completely randomized design in a screen house with four treatments and three experimental units. The treatments tested were mycorrhiza 5 g per plant (M), a mixed solution containing Bacillus sp., Pseudomonas sp., and Trichoderma sp. 10 ml per plant (PGPM1), and combination treatment M and PGPM1 (PGPM2). The study showed a more extended incubation period of the pathogen-causing diseased plants with the treatment of PGPM2 compared to other treatments. The lower intensity of wilt disease was also found in the PGPM2 treatment. Consistently the same treatment also had a better effect on the number of leaves, plant height, and fresh tomato fruit production than other treatments. This study showed a significant effect of PGPM in controlling Fusarium wilt and increasing tomato production.

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“…Plants subjected to diverse biotic and abiotic stresses can induce changes in root and leaf exudates and subsequently alter the plant microbiome assembly [3]. A special role in the microbiome is played by plant beneficial bacteria that effectively colonize the plant and contribute to nutrient supply [4,5] and/or defence against pathogens by direct antagonism, competition or plant-supporting metabolic activities [6][7][8]. The abundance of these microorganisms in the microbiome has been linked to plant growth and health in several studies [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Genomic Characterization of Aureimonas altamirensis C2P003—A Specific Member of the Microbiome of Fraxinus excelsior Trees Tolerant to Ash Dieback

Becker

Ulrich

Behrendt

et al. 2022

Plants

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Some European ash trees show tolerance towards dieback caused by the invasive pathogen Hymenoscyphus fraxineus. The microbiome of these trees harbours a range of specific bacterial groups. One of these groups belonging to the species Aureimonas altamirensis was studied in detail by genome analysis and a plant inoculation trial. The strain group was shown to be phylogenetically distinct from clinical isolates by 16S rRNA analysis and phylogenomics. Genome analysis of a representative strain C2P003 resulted in a large number of unique gene sequences in comparison to other well-studied strains of the species. A functional analysis of the genome revealed features associated with the synthesis of exopolysaccharides, protein secretion and biofilm production as well as genes for stress adaptation, suggesting the ability of C2P003 to effectively colonize ash leaves. The inoculation of ash seedlings with C2P003 showed a significant positive effect on the plant health of the seedlings that were exposed to H. fraxineus infection. This effect was maintained over a period of three years and was accompanied by a significant shift in the bacterial microbiome composition one year after inoculation. Overall, the results indicate that C2P003 may suppress H. fraxineus in or on ash leaves via colonization resistance or indirectly by affecting the microbiome.

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Plant growth promoting microbes: a future trend for environmental sustainability

Cited by 7 publications

References 88 publications

Dynamics of rare earth elements and associated major and trace elements during Douglas-fir (Pseudotsuga menziesii) and European beech (Fagus sylvaticaL.) litter degradation

Dynamics of rare earth elements and associated major and trace elements during Douglas-fir (Pseudotsuga menziesii) and European beech (Fagus sylvaticaL.) litter degradation

Double action plant growth promotion microorganisms in suppressing Fusarium wilt disease and increase tomato production

Genomic Characterization of Aureimonas altamirensis C2P003—A Specific Member of the Microbiome of Fraxinus excelsior Trees Tolerant to Ash Dieback

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