Journal ArticleDOI
Chitinolytic Bacillus-Mediated Induction of Jasmonic Acid and Defense-Related Proteins in Soybean (Glycine max L. Merrill) Plant Against Rhizoctonia solani and Fusarium oxysporum
Shekhar Jain,Anukool Vaishnav,Sarita Kumari,Ajit Varma,Narendra Tuteja,Devendra Kumar Choudhary +5 more
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TLDR
A role for the bacterial isolate Bacillus sp.Abstract:
In the present research, bacterial-mediated elicitation of induced systemic resistance in the soybean plant was studied. The main objective was in vitro analysis of jasmonic acid and different defense-related enzymes in soybean plants primed with bacterium Bacillus sp. SJ-5 against the fungal pathogen Rhizoctonia solani and Fusarium oxysporum. In the different assays conducted, Bacillus sp. SJ-5 showed strong antifungal activity against R. solani and F. oxysporum showing 45 and 63 % growth inhibition, respectively. Strain SJ-5 was found to be positive for the cell wall-degrading enzymes chitinase, protease, and β-1,3-glucanase, and cell-free supernatant was found with significant fungal growth inhibitory activity. Different defense-related enzymes, namely lipoxygenase, phenylalanine ammonia-lyase, peroxidase, polyphenol oxidase, and β-1,3-glucanase in the different parts of Glycine max L. Merrill were reported to be highest on the 8th day after challenge inoculation and expressed significantly in the root tissue. GC–MS analysis of jasmonic acid (JA) revealed the highest JA accumulation in bacterized soybean plant root tissue challenged with R. solani and F. oxysporum, which was 91.2 and 99.84 %, respectively, with respect to control. In the SJ-5-primed root tissue, phenolic content was highest upon challenge inoculation of R. solani and F. oxysporum with 30.47 ± 0.97 and 32.4 ± 0.3 mg/g fresh weight, respectively. In summary, the present investigation revealed a role for the bacterial isolate Bacillus sp. SJ-5 in soybean plant growth promotion and enhanced protection against R. solani and F. oxysporum by elicitation of defense-related enzymes.read more
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The Significance of Bacillus spp. in Disease Suppression and Growth Promotion of Field and Vegetable Crops
TL;DR: It is necessary to understand how different strains function in biological control and plant growth promotion, and distinctly define the factors that contribute to their more efficient use in the field.
Journal ArticleDOI
Communication of plants with microbial world: Exploring the regulatory networks for PGPR mediated defense signaling
TL;DR: In this article, a review of plant derived signaling molecules for their communication, regulatory and signaling networks of PGPR and their different products that are involved in inducing resistance and tolerance in plants against environmental stresses and the effect of defense signaling on root microbiome is presented.
Journal ArticleDOI
Recent advances in polyphenol oxidase-mediated plant stress responses
Jin Zhang,Xiaoling Sun +1 more
TL;DR: Assumptions of an extended range of co- and post-transcriptional processes to the regulation of unexplored PPO expression are proposed and the identification of endogenous PPO substrates and downstream targets of PPO action will be useful for elucidating PPO defensive roles.
Journal ArticleDOI
Antagonist effects of strains of Bacillus spp. against Rhizoctonia solani for their protection against several plant diseases: Alternatives to chemical pesticides.
Aqleem Abbas,Shahid Ullah Khan,Wasim Ullah Khan,Tawfik A. Saleh,Muhammad Hafeez Ullah Khan,Sana Ullah,Ahmad Ali,Muhammad Ikram +7 more
TL;DR: The use of biocontrol agents (BCAs) and that of plant-growth promoting bacteria (PGPB) are considered to be potentially sustainable, cost-effective, efficient, and eco-friendly ways to control R.solani.
Journal ArticleDOI
Biocontrol of Rhizoctonia solani via Induction of the Defense Mechanism and Antimicrobial Compounds Produced by Bacillus subtilis SL-44 on Pepper (Capsicum annuum L.).
TL;DR: The results suggest that B. subtilis SL-44 could not only activate induced systemic resistance of pepper seedling against wilt disease caused by R.solani by jasmonic acid-dependent signaling pathway but also produce antifungal compounds to inhibit or even damage the mycelium growth of R. solani.
References
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