Antagonistic features displayed by Plant Growth Promoting Rhizobacteria (PGPR): A Review

M, Tariq

doi:10.29328/journal.jpsp.1001004

Cited by 87 publications

(7 citation statements)

References 50 publications

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“…These PGPR can affect plant growth and development in different ways. In general, PGPR promote plant growth directly by increasing nutrient acquisition (N, P, K, and essential minerals) or by regulating plant hormone levels, or indirectly, by reducing the inhibitory effects of various pathogens on plant growth and development in the form of biological control agents (Tariq et al, 2017). PGPR also clean the environment by detoxifying pollutants such as heavy metals and pesticides.…”

Section: Introductionmentioning

confidence: 99%

Effect of Two Different Sugarcane Cultivars on Rhizosphere Bacterial Communities of Sugarcane and Soybean Upon Intercropping

et al. 2021

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Intercropping of soybean and sugarcane is an important strategy to promote sustainable development of the sugarcane industry. In fact, our understanding of the interaction between the rhizosphere and bacterial communities in the intercropping system is still evolving; particularly, the influence of different sugarcane varieties on rhizosphere bacterial communities in the intercropping process with soybean, still needs further research. Here, we evaluated the response of sugarcane varieties ZZ1 and ZZ9 to the root bacterial community during intercropping with soybean. We found that when ZZ9 was intercropped with soybean, the bacterial diversity increased significantly as compared to that when ZZ1 was used. ZZ9 played a major role in changing the bacterial environment of the root system by affecting the diversity of rhizosphere bacteria, forming a rhizosphere environment more conducive to the growth of sugarcane. In addition, our study found that ZZ1 and ZZ9 had differed significantly in their utilization of nutrients. For example, nutrients were affected by different functional genes in processes such as denitrification, P-uptake and transport, inorganic P-solubilization, and organic P-mineralization. These results are significant in terms of providing guidance to the sugarcane industry, particularly for the intercropping of sugarcane and soybean in Guangxi, China.

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Section: Introductionmentioning

confidence: 99%

Effect of Two Different Sugarcane Cultivars on Rhizosphere Bacterial Communities of Sugarcane and Soybean Upon Intercropping

et al. 2021

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“…Both subtilisin-like protein forms were also present in peak 2, even if with a lower concentration, together with a B-glucanase, whereas peak 3 contains a metalloprotease and an alpha-amylase. Since serine-proteases, Beta-glucanase and glucoronoxylanase were demonstrated to act as antifungal agents [18,19], our results suggested that the activity of these secreted molecules could be responsible, at least partially, of the antifungal action of RHFS10. To further corroborate this hypothesis, a mass spectrometry-based proteomic analysis on the previously described 72-CFSs of RHFS10 strain treated at increasing temperatures (cfr.…”

Section: Preliminary Identification Of Bioactive Compoundmentioning

confidence: 76%

Growth Promotion Function of <em>Bacillus</em> sp. Strains Isolated From Salt-Pan Rhizosphere and Their Biocontrol Potential Against <em>Macrophomina Phaseolina</em>

Castaldi¹,

Petrillo²,

Donadio³

et al. 2021

Preprint

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In the last decades, intensive crop management has involved excessive use of pesticides or fertilizers, compromising environmental integrity and public health. Accordingly, there has been worldwide pressure to find an eco-friendly and safe strategy to ensure agricultural productivity. Recently, Plant Growth-Promoting (PGP) rhizobacteria are receiving increasing attention as suitable biocontrol agents against agricultural pests. In the present study, 22 spore-forming bacteria were selected among a salt-pan rhizobacteria collection for their PGP traits and their antagonistic activity against the plant pathogen fungus Macrophomina phaseolina. Based on the higher antifungal activity, strain RHFS10, identified as Bacillus vallismortis, was furtherly examined and cell-free supernatants assays, column purification, and tandem mass spectrometry employed to purify and preliminarily identify the antifungal metabolites. Interestingly, the minimum inhibitory concentration assessed for the fractions active against M. phaseolina, resulted 10 times lower and more stable than the one estimated for the commercial fungicide pentachloronitrobenzene. These results suggest the use of B. vallismortis strain RHFS10 as a potential Plant Growth Promoting Rhizobacteria to efficiently control phytopathogenic fungus M. phaseolina, in alternative to chemical pesticides.

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“…This increase was due to the physiological activity of bacteria in the bionematicide formula (Mehmood et al 2018). Tariq et al (2017) reported that rhizobacteria had dual roles as plant protector agent and plant growth promoter. In a separate study, Afzal et al (2019) also reported that endophytic bacteria could induce plant growth.…”

Section: Discussionmentioning

confidence: 99%

Cost-effective bacteria-based bionematicide formula to control the root-knot nematode Meloidogyne spp. on tomato plants

et al. 2021

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Abstract. Asyiah IN, Prihatin J, Hastuti AD, Winarso S, Widjayanthi L, Nugroho D, Firmansyah K, Pradana AP. 2021. Cost-effective bacteria-based bionematicide formula to control root-knot nematode Meloidogyne spp. in tomato plants. Biodiversitas 22: 3256-3264. The root-knot nematode, Meloidogyne spp. can infect and cause loss production in various horticultural plants, including tomatoes. In the previous study, we found 3 endophytic bacteria isolates and 1 rhizobacterium isolate that could control several plant-parasitic nematodes. In this study, we formulated these bionematicide isolates with cheap and environmentally friendly organic materials. The formula was fortified using several organic matters, vitamin sources, protein sources, and sugar sources. The research was conducted in an experimental land with a history of severe root-knot nematode infection. The analysis showed that there were 63.7 J2 Meloidogyne spp. per 100 ml of soil on the experimental land. The application was given at a time interval of 2 weeks at the concentration of 0.5%, 1%, 1.5%, and 2%, with a dose of 100 ml per plant. As a negative control, the plant did not give any treatments, and as a positive control, the plant was given 5 g carbofuran per plant. The results revealed that treatment with 2% bionematicide formula concentration showed the best consistent result. This treatment increased canopy wet weight by 38.63% and root dry weight by 106.97% compared to negative control. The P4 treatment was also found effective to increase fruit weight by 33.61% and fruit diameter by 26.16% as compared to negative control. Increased plant growth in P4 treatment was closely related to the total of root-knot suppression and root damage intensity. In the P4 treatment, the total of root-knots and root damage intensities was 44.83% and 32.66%, respectively, compared to the negative control. This suppression also occurred in the nematode population and nematode eggs. In the P4 treatment, the total of Meloidogyne spp. J2 in soil and root was lower by 60.74% and 66.24%, respectively, compared to the negative control. A similar phenomenon also occurred in the total of eggs, which was 79.40% lower than the total of eggs in the negative control. This study provides the latest information about a cost-effective bacteria-based bionematicide formula, which is effective in suppressing Meloidogyne spp. infection in tomato, and promotes the growth and development tomato plant.

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Antagonistic features displayed by Plant Growth Promoting Rhizobacteria (PGPR): A Review

Cited by 87 publications

References 50 publications

Effect of Two Different Sugarcane Cultivars on Rhizosphere Bacterial Communities of Sugarcane and Soybean Upon Intercropping

Effect of Two Different Sugarcane Cultivars on Rhizosphere Bacterial Communities of Sugarcane and Soybean Upon Intercropping

Growth Promotion Function of <em>Bacillus</em> sp. Strains Isolated From Salt-Pan Rhizosphere and Their Biocontrol Potential Against <em>Macrophomina Phaseolina</em>

Cost-effective bacteria-based bionematicide formula to control the root-knot nematode Meloidogyne spp. on tomato plants

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