Management of late leaf spot (Phaeoisariopsis personata) and root rot (Macrophomina phaseolina) diseases of groundnut (Arachis hypogaea L.) with plant growth-promoting rhizobacteria, systemic acquired resistance inducers and plant extracts

Shifa, Hassen; Gopalakrishnan, C.; Velazhahan, R.

doi:10.1007/s12600-018-0644-z

Cited by 16 publications

(7 citation statements)

References 46 publications

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“…Finally, different BEs are constituted by aromatic hydrocarbons, such as phenylpropanoids, which are involved in various diseaseresistance responses through secondary metabolite synthesis (Li et al, 2017). In this sense, commercial products based on different BEs also are rich in polysaccharides and amino acids that can induce plant defense (Jayaraman et al, 2011;Shifa et al, 2018). Foliar synthetic elicitors sprays favored physiological and biochemical parameters, especially in cape gooseberry plants affected by hypoxia conditions in the soil.…”

Section: Discussionmentioning

confidence: 99%

Mitigation of the Impact of Vascular Wilt and Soil Hypoxia on Cape Gooseberry Plants by Foliar Application of Synthetic Elicitors

Chávez-Arias¹,

Gómez-Caro²,

Restrepo-Díaz³

2020

horts

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Physalis peruviana L. crops are exposed to different stress conditions that limit their productivity. Within these conditions, abiotic stress caused by water and biotic stress by Fusarium oxysporum f. sp. physali (Foph) are frequent at commercial levels. The foliar application of synthetic elicitors can be a tool to mitigate the negative impacts of these stresses. The objective of this study was to evaluate the interaction between Foph inoculation and three foliar applications of brassinosteroids (BR), salicylic acid (SA), and a commercial elicitor based on botanical extracts (BE) of Echinacea purpurea, Potentilla erecta, and Aloe vera on the physiological [stomatal conductance (gS), leaf water potential (Ψwf), chlorophyll fluorescence, and growth] and biochemical [photosynthetic pigments, malondialdehyde (MDA) production, and proline content] responses of cape gooseberry plants subjected to a 6-day waterlogging period. The established treatments were as follows: 1) waterlogged plants without Foph; 2) waterlogged plants with Foph; 3) waterlogged, noninoculated (Foph−) plants treated foliarly with BR, SA, or BE; and 4) waterlogged, inoculated (Foph+) plants treated foliarly with BR, SA, or BE. The results showed that the foliar application of BR or SA reduced vascular wilt development in plants subjected to a hypoxia period. In addition, three applications of BR, SA, or BE favored gS, Ψwf, growth, and chlorophyll fluorescence parameters in cape gooseberry plants under the interaction between Foph and oxygen deficit in the soil. Also, higher photosynthetic pigment and proline contents were observed in plants treated with elicitors under stress combination, whereas a lower MDA production was evidenced in this group of plants. In conclusion, BR, SA, or BE can help mitigate the negative effects of the simultaneous occurrence of Foph and a waterlogging condition for 6 days in cape gooseberry plants.

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Section: Discussionmentioning

confidence: 99%

Mitigation of the Impact of Vascular Wilt and Soil Hypoxia on Cape Gooseberry Plants by Foliar Application of Synthetic Elicitors

Chávez-Arias¹,

Gómez-Caro²,

Restrepo-Díaz³

2020

horts

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“…Anco et al [43] found that the combination of prothion conazole with uxapyroxad and pyraclostrobin could more effectively prevent and control the black spot of peanut. Shifa et al [44] sprayed salicylic acid on the leaves to induce systemic acquired resistance in peanuts, signi cantly reducing the incidence of the late spot. Zhang et al [45] con rmed that the endophytic fungus Phomopsis liquidambaris could simultaneously inhibit the occurrence of the peanut root rot and leaf spot.…”

Section: Discussionmentioning

confidence: 99%

The Resistance of Peanut to Soil-Borne Pathogens Improved by Rhizosphere Probiotics Under Calcium Treatment

Zhang

Lin

et al. 2021

Preprint

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Background: Peanut (Arachis hypogaea L.) is an important oil and economic crop. Calcium can regulate plant autoimmunity, respond to biotic and abiotic stresses, and improve plant resistance to pathogens. The enrichment of beneficial microorganisms in the rhizosphere is related to plant disease resistance and soil development. The purpose was to analyze the differences of peanut rhizosphere microbial community structure between calcium treatment and control during two growth stages, and the reason that calcium application could improve peanut’s resistance to soil-borne pathogens.. Results: The 16S amplicon sequencing of rhizosphere microbiome showed that calcium application significantly enriched Serratia marcescens and other three dominant strains at the seedling stage. At the pod filling stage, ten dominant stains such as Sphingomonas changbaiensis and Novosphingobium panipatense were enriched by calcium. Serratia marcescens aseptic fermentation filtrate was mixed with PDA medium and inoculated with soil-borne pathogens, which could inhibit the growth of Fusarium solani and Aspergillus flavus at the seedling stage. The fermentation filtrate of Novosphingobium panipatense was mixed with PDA medium and inoculated with main pathogens, which could inhibit the growth of Sclerotium rolfsii and Leptosphaerulina arachidicola.Conclusions: Calcium application enhanced the ability of peanuts to resist pathogens by enriching specific dominant bacteria.

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“…Among the beneficial rhizobacteria associated with plant roots, the genus Pseudomonas is one of the most studied. The principal interactions of these rhizobacteria with the plants include cooperation with the plant host by plant growth promotion (PGPR), induction of systemic acquired resistance (SAR; Shifa et al 2018;Kamle et al 2020), and competition or antagonism to soil-borne phytopathogens. In addition, these bacteria can show insecticidal activity and use insects as vectors for dispersal (Esposti and Romero 2017;Flury et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Insecticidal features displayed by the beneficial rhizobacterium Pseudomonas chlororaphis PCL1606

et al. 2022

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The biocontrol rhizobacterium Pseudomonas chlororaphis is one of the bacterial species of the P. fluorescens group where insecticide fit genes have been found. Fit toxin, supported with other antimicrobial compounds, gives the bacterial the ability to repel and to fight against eukaryotic organisms, such as nematodes and insect larvae, thus protecting the plant host and itself. Pseudomonas chlororaphis PCL1606 is an antagonistic rhizobacterium isolated from avocado roots and show efficient biocontrol against fungal soil-borne disease. The main antimicrobial compound produced by P. chlororaphis PCL606 is 2-hexyl-5-propyl resorcinol (HPR), which plays a crucial role in effective biocontrol against fungal pathogens. Further analysis of the P. chlororaphis PCL1606 genome showed the presence of hydrogen cyanide (HCN), pyrrolnitrin (PRN), and homologous fit genes. To test the insecticidal activity and to determine the bases for such activity, single and double mutants on the biosynthetic genes of these four compounds were tested in a Galleria mellonella larval model using inoculation by injection. The results revealed that Fit toxin and HPR in combination are involved in the insecticide phenotype of P. chlororaphis PCL1606, and additional compounds such as HCN and PRN could be considered supporting compounds.

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Management of late leaf spot (Phaeoisariopsis personata) and root rot (Macrophomina phaseolina) diseases of groundnut (Arachis hypogaea L.) with plant growth-promoting rhizobacteria, systemic acquired resistance inducers and plant extracts

Cited by 16 publications

References 46 publications

Mitigation of the Impact of Vascular Wilt and Soil Hypoxia on Cape Gooseberry Plants by Foliar Application of Synthetic Elicitors

Mitigation of the Impact of Vascular Wilt and Soil Hypoxia on Cape Gooseberry Plants by Foliar Application of Synthetic Elicitors

The Resistance of Peanut to Soil-Borne Pathogens Improved by Rhizosphere Probiotics Under Calcium Treatment

Insecticidal features displayed by the beneficial rhizobacterium Pseudomonas chlororaphis PCL1606

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