Integration of anti-penetrant tricyclazole, signaling molecule salicylic acid and root associated Pseudomonas fluorescens enhances suppression of Bipolaris sorokiniana in bread wheat (Triticum aestivum L.)

Singh, Udai B.; Singh, Shailendra; Malviya, Deepti; Karthikeyan, N.; Imran, Mohd; Chaurasia, Rajan; Alam, Mehtab; Singh, Priyanka; Sarma, B. K.; P., Jai; Damodaran, T.; Tripathi, J. K.; Kumar, Sunil; Sharma, Arun Kumar

doi:10.1007/s42161-019-00296-5

Cited by 17 publications

(13 citation statements)

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“…Such host‐specific behavior is also seen in response to another resistance inducer, Trichoderma spp., which can induce SA as well as JA/ET signaling depending on the experimental conditions and the exact Trichoderma species involved (reviewed by Vos et al ., 2015). In wheat, root colonization with either the bacterium Pseudomonas fluorescens or the fungus T. harzianum can induce resistance against Bipolaris sorokiniana (Singh et al ., 2019a,b). Interestingly, this reaction is fortified by co‐application of SA in the case of Pseudomonas fluorescens and of MeJA in the case of T. harzianum , with the latter inducing SA production in the plant.…”

Section: Induced Systemic Resistance (Isr)mentioning

confidence: 99%

Systemic propagation of immunity in plants

et al. 2020

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Systemic immunity triggered by local plant-microbe interactions is studied as systemic acquired resistance (SAR) or induced systemic resistance (ISR) depending on the site of induction and the lifestyle of the inducing microorganism. SAR is induced by pathogens interacting with leaves, whereas ISR is induced by beneficial microbes interacting with roots. Although salicylic acid (SA) is a central component of SAR, additional signals exclusively promote systemic and not local immunity. These signals cooperate in SAR-and possibly also ISR-associated signaling networks that regulate systemic immunity. The non-SA SAR pathway is driven by pipecolic acid or its presumed bioactive derivative N-hydroxy-pipecolic acid. This pathway further regulates interplant defense propagation through volatile organic compounds that are emitted by SARinduced plants and recognized as defense cues by neighboring plants. Both SAR and ISR influence phytohormone crosstalk towards enhanced defense against pathogens, which at the same time affects the composition of the plant microbiome. This potentially leads to further changes in plant defense, plant-microbe, and plant-plant interactions. Therefore, we propose that such inter-organismic interactions could be combined in potentially highly effective plant protection strategies.

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Section: Induced Systemic Resistance (Isr)mentioning

confidence: 99%

Systemic propagation of immunity in plants

et al. 2020

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“…Management of spot blotch in wheat is largely dependent on the use of resistant cultivars and toxic chemical fungicides. Use of resistant cultivars is an important approach conferring sustainability to the agro-ecosystem but the breakdown of resistance over a period of time has still remained a great concern and it seems to be the major limitation of this approach (Singh G. et al, 2014; Singh et al, 2015, 2016a, 2019). Further, the non-target negative impact of plant protection chemicals, including fungicides, on both the environment and human health has obligated researchers to explore alternative measures for management of this disease.…”

Section: Introductionmentioning

confidence: 99%

Trichoderma harzianum- and Methyl Jasmonate-Induced Resistance to Bipolaris sorokiniana Through Enhanced Phenylpropanoid Activities in Bread Wheat (Triticum aestivum L.)

et al. 2019

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The aim of the present study was to evaluate the impact of Trichoderma harzianum UBSTH-501- and methyl jasmonate-induced systemic resistance and their integration on the spot blotch pathogen, Bipolaris sorokiniana through enhanced phenylpropanoid activities in bread wheat ( Triticum aestivum L.). It was found that the application of MeJA (>100 mg L –1 ) inhibits the germination of B. sorokiniana spores under controlled laboratory conditions. To assess the effect of MeJA (150 mg L –1 ) in combination with the biocontrol agent T. harzianum UBSTH-501 in vivo , a green house experiment was conducted. For this, biocontrol agent T. harzianum UBSTH-501 was applied as seed treatment, whereas MeJA (150 mg L –1 ) was applied 5 days prior to pathogen inoculation. Results indicated that application of MeJA (150 mg L –1 ) did not affect the root colonization of wheat by T. harzianum UBSTH-501 in the rhizosphere. The combined application of T. harzianum UBSTH-501 and MeJA also enhanced indole acetic acid production in the rhizosphere (4.92 μg g –1 of soil) which in turn helps in plant growth and development. Further, the combined application found to enhance the activities of defense related enzymes viz. catalase (5.92 EU min –1 g –1 fresh wt.), ascorbate peroxidase [μmol ascorbate oxidized (mg prot) –1 min –1 ], phenylalanine ammonia lyase (102.25 μmol cinnamic acid h –1 mg –1 fresh wt.) and peroxidase (6.95 Unit mg –1 min –1 fresh wt.) significantly in the plants under treatment which was further confirmed by assessing the transcript level of PAL and peroxidase genes using semi-quantitative PCR approach. The results showed manifold increase in salicylic acid (SA) along with enhanced accumulation of total free phenolics, ferulic acid, caffeic acid, coumaric acid, and chlorogenic acid in the leaves of the plants treated with the biocontrol agent alone or in combination with MeJA. A significant decrease in the disease severity (17.46%) and area under disease progress curve (630.32) were also observed in the treatments with biocontrol agent and MeJA in combination as compared to B. sorokiniana alone treated plant (56.95% and 945.50, respectively). Up-regulation of phenylpropanoid cascades in response to exogenous application of MeJA and the biocontrol agent was observed. It was depicted from the results that PAL is the primary route for lignin production in wheat which reduces cell wall disruption and tissue disintegration and increases...

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“…These bioactive compounds are produced by microorganisms, specificallyby the Bacillus genus whichis considered one of the most important bioactive compound factories [2,3,8]. Plant diseases caused by phytopathogenshave beenone of the most important and emerging categories of threats to global food security [9,10]. Microbiome associated with the plants is known to produce a structurally diverse group of compounds with hydrophilic and hydrophobic moieties and of which exhibitsbiosurfactant activity.…”

Section: Introductionmentioning

confidence: 99%

“…These cyclic lipopeptides produced by different microorganisms retain antiviral, antifungal, antibacterial, biofilm-forming, and plant resistance-inducing activities. Several reports indicate that these small molecular weight lipopeptides facilitate root colonization in many plants [8][9][10]15,16]. They act as potential antagonists by direct inhibition of phytopathogens through different mechanisms and/or by stimulating and strengthening plant defense machinery of defense-related networks known as induced systemic resistance (ISR) [16].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, cyclic lipopeptides may be involved anywhere in the three-step process of ISR, viz. the perception of bacterial elicitor, systemic signal transduction, and, finally, defense gene expression in the host system [8][9][10]. However, the role of plant growth-promoting rhizobacteria (PGPR) in the signaling and induction of defense mechanisms isbeing well documented [31,32].…”

Section: Introductionmentioning

confidence: 99%

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Lesson from Ecotoxicity: Revisiting the Microbial Lipopeptides for the Management of Emerging Diseases for Crop Protection

Malviya

Sahu

Singh

et al. 2020

IJERPH

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Microorganisms area treasure in terms of theproduction of various bioactive compounds which are being explored in different arenas of applied sciences. In agriculture, microbes and their bioactive compounds are being utilized in growth promotion and health promotion withnutrient fortification and its acquisition. Exhaustive explorations are unraveling the vast diversity of microbialcompounds with their potential usage in solving multiferous problems incrop production. Lipopeptides are one of such microbial compounds which havestrong antimicrobial properties against different plant pathogens. These compounds are reported to be produced by bacteria, cyanobacteria, fungi, and few other microorganisms; however, genus Bacillus alone produces a majority of diverse lipopeptides. Lipopeptides are low molecular weight compounds which havemultiple industrial roles apart from being usedas biosurfactants and antimicrobials. In plant protection, lipopeptides have wide prospects owing totheirpore-forming ability in pathogens, siderophore activity, biofilm inhibition, and dislodging activity, preventing colonization bypathogens, antiviral activity, etc. Microbes with lipopeptides that haveall these actions are good biocontrol agents. Exploring these antimicrobial compounds could widen the vistasof biological pest control for existing and emerging plant pathogens. The broader diversity and strong antimicrobial behavior of lipopeptides could be a boon for dealing withcomplex pathosystems and controlling diseases of greater economic importance. Understanding which and how these compounds modulate the synthesis and production of defense-related biomolecules in the plants is a key question—the answer of whichneeds in-depth investigation. The present reviewprovides a comprehensive picture of important lipopeptides produced by plant microbiome, their isolation, characterization, mechanisms of disease control, behavior against phytopathogens to understand different aspects of antagonism, and potential prospects for future explorations as antimicrobial agents. Understanding and exploring the antimicrobial lipopeptides from bacteria and fungi could also open upan entire new arena of biopesticides for effective control of devastating plant diseases.

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Integration of anti-penetrant tricyclazole, signaling molecule salicylic acid and root associated Pseudomonas fluorescens enhances suppression of Bipolaris sorokiniana in bread wheat (Triticum aestivum L.)

Cited by 17 publications

References 38 publications

Systemic propagation of immunity in plants

Systemic propagation of immunity in plants

Trichoderma harzianum- and Methyl Jasmonate-Induced Resistance to Bipolaris sorokiniana Through Enhanced Phenylpropanoid Activities in Bread Wheat (Triticum aestivum L.)

Lesson from Ecotoxicity: Revisiting the Microbial Lipopeptides for the Management of Emerging Diseases for Crop Protection

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