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Bio-protective microbial agents from rhizosphere eco-systems triggering plant defense responses provide protection against sheath blight disease in rice (Oryza sativa L.)

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Title Bio-protective microbial agents from rhizosphere eco-systems triggering plant defense responses provide protection against sheath blight disease in rice (Oryza sativa L.)
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Creator Udai B. Singh, Deepti Malviya, Wasiullah, Shailendra Singh, Jatindra K. Pradhan, Bhanu P. Singh, Manish Roy, Mohd. Imram, Neelam Pathak, B.M. Baisyal, Jai P. Rai, B.K. Sarma, Rajiv K. Singh, P.K. Sharma, Saman Deep Kaur, M.C. Manna,Sushil K. Sharma, Arun K. Sharma
 
Subject Pseudomonas, Trichoderma, Rhizosphere, Defence-related biomolecules, Induced systemic resistance (ISR), Signalling biomolecules
 
Description Not Available
Sheath blight of rice (Oryza sativa L.) caused by Rhizoctonia solani is a major disease and attempts are beingmade to develop microbe based technologies for biocontrol of this pathogen. However, the mechanisms ofbiocontrol are not fully understood and still require indepth study in the backdrop of emerging conceptsin biological systems. The present investigation was aimed at deciphering the mechanisms of biocontrolof sheath blight of rice employing Pseudomonas fluorescens and Trichoderma harzianum as model agentsfor biocontrol. Initially 25, 5 and 5 strains of P. fluorescens, T. viride and T. harzianum, respectively, werescreened for their biocontrol potential. Out of which, six strains with higher value of percent inhibition offungal mycelium in dual plate assay were selected. The role of P. fluorescens, T. viride and T. harzianum wereinvestigated in induction and bioaccumulation of natural antioxidants, defence-related biomolecules andother changes in plant which lead not only to growth promotion but also protection from pathogenicstress conditions in rice. The two most promising strains, P. fluorescens PF-08 and T. harzianum UBSTH-501selected on the basis of in planta evaluation, when applied individually or in combination, significantlyenhanced the accumulation of defence-related biomolecules, enzymes and exhibited biocontrol poten-tial against R. solani. A modified/newly developed delivery system was applied for the first time in theexperiments involving inoculation of plants with both bioagents, viz. P. fluorescens PF-08 and T. harzianumUBSTH-501. Results suggested that application of P. fluorescens PF-08 and T. harzianum UBSTH-501 aloneor in combination, not only helps in control of the disease but also increases plant growth along withreduction in application of toxic chemical pesticides.
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Date 2021-07-28T06:28:16Z
2021-07-28T06:28:16Z
2016-01-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/50562
 
Language English
 
Relation Not Available;
 
Publisher Elsevier