Browsing by Author "Vaishnav, Anukool"
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Publication Belowground fungal volatiles perception in okra (Abelmoschus esculentus) facilitates plant growth under biotic stress(Elsevier GmbH, 2021) Singh, Jyoti; Singh, Prachi; Vaishnav, Anukool; Ray, Shatrupa; Rajput, Rahul Singh; Singh, Shiv Mohan; Singh, Harikesh BahadurMicrobial volatile organic compounds (mVOCs) have great potential in plant ecophysiology, yet the role of belowground VOCs in plant stress management remains largely obscure. Analysis of biocontrol producing VOCs into the soil allow detailed insight into their interaction with soil borne pathogens for plant disease management. A root interaction trial was set up to evaluate the effects of VOCs released from Trichoderma viride BHU-V2 on soil-inhabiting fungal pathogen and okra plant growth. VOCs released into soil by T. viride BHU-V2 inhibited the growth of collar rot pathogen, Sclerotium rolfsii. Okra plants responded to VOCs by increasing the root growth (lateral roots) and total biomass content. VOCs exposure increased defense mechanism in okra plants by inducing different enzyme activities i.e. chitinase (0.89 fold), ?-1,3-glucanase (0.42 fold), peroxidase (0.29 fold), polyphenol oxidase (0.33 fold) and phenylalanine lyase (0.7 fold) when inoculated with S. rolfsii. In addition, T. viride BHU-V2 secreted VOCs reduced lipid peroxidation and cell death in okra plants under pathogen inoculated condition. GC/MS analysis of VOCs blend revealed that T. viride BHU-V2 produced more number of antifungal compounds in soil medium as compared to standard medium. Based on the above observations it is concluded that okra plant roots perceive VOCs secreted by T. viride BHU-V2 into soil that involved in induction of plant defense system against S. rolfsii. In an ecological context, the findings reveal that belowground microbial VOCs may play an important role in stress signaling mechanism to interact with plants. � 2021Publication Current understanding of plant-microbe interaction through the lenses of multi-omics approaches and their benefits in sustainable agriculture(Elsevier GmbH, 2022) Diwan, Deepti; Rashid, Md. Mahtab; Vaishnav, AnukoolThe success of sustainable agricultural practices has now become heavily dependent on the interactions between crop plants and their associated microbiome. Continuous advancement in high throughput sequencing platforms, omics-based approaches, and gene editing technologies has remarkably accelerated this area of research. It has enabled us to characterize the interactions of plants with associated microbial communities more comprehensively and accurately. Furthermore, the genomic and post-genomic era has significantly refined our perspective toward the complex mechanisms involved in those interactions, opening new avenues for efficiently deploying the knowledge in developing sustainable agricultural practices. This review focuses on our fundamental understanding of plant-microbe interactions and the contribution of existing multi-omics approaches, including those under active development and their tremendous success in unraveling different aspects of the complex network between plant hosts and microbes. In addition, we have also discussed the importance of sustainable and eco-friendly agriculture and the associated outstanding challenges ahead. � 2022 Elsevier GmbHPublication Epigenetic regulation of salinity stress responses in cereals(Springer Science and Business Media B.V., 2022) Rashid, Md. Mahtab; Vaishnav, Anukool; Verma, Rakesh Kumar; Sharma, Pradeep; Suprasanna, P.; Gaur, R.K.Cereals are important crops and are exposed to various types of environmental stresses that affect the overall growth and yield. Among the various abiotic stresses, salt stress is a major environmental factor that influences the genetic, physiological, and biochemical responses of cereal crops. Epigenetic regulation which includes DNA methylation, histone modification, and chromatin remodelling plays an important role in salt stress tolerance. Recent studies in rice genomics have highlighted that the epigenetic changes are heritable and therefore can be considered as molecular signatures. An epigenetic mechanism under salinity induces phenotypic responses involving modulations in gene expression. Association between histone modification and altered DNA methylation patterns and differential gene expression has been evidenced for salt sensitivity in rice and other cereal crops. In addition, epigenetics also creates stress memory that helps the plant to better combat future stress exposure. In the present review, we have discussed epigenetic influences in stress tolerance, adaptation, and evolution processes. Understanding the epigenetic regulation of salinity could help for designing salt-tolerant varieties leading to improved crop productivity. � 2021, The Author(s), under exclusive licence to Springer Nature B.V.Publication Extending the benefits of PGPR to bioremediation of nitrile pollution in crop lands for enhancing crop productivity(Elsevier B.V., 2022) Vaishnav, Anukool; Kumar, Roshan; Singh, Harikesh Bahadur; Sarma, Birinchi KumarIncessant release of nitrile group of compounds such as cyanides into agricultural land through industrial effluents and excessive use of nitrile pesticides has resulted in increased nitrile pollution. Release of nitrile compounds (NCs) as plant root exudates is also contributing to the problem. The released NCs interact with soil elements and persists for a long time. Persistent higher concentration of NCs in soil cause toxicity to beneficial microflora and affect crop productivity. The NCs can cause more problems to human health if they reach groundwater and enter the food chain. Nitrile degradation by soil bacteria can be a solution to the problem if thoroughly exploited. However, the impact of such bacteria in plant and soil environments is still not properly explored. Plant growth-promoting rhizobacteria (PGPR) with nitrilase activity has recently gained attention as potential solution to address the problem. This paper reviews the core issue of nitrile pollution in soil and the prospects of application of nitrile degrading bacteria for soil remediation, soil health improvement and plant growth promotion in nitrile-polluted soils. The possible mechanisms of PGPR that can be exploited to degrade NCs, converting them into plant useful compounds and synthesis of the phytohormone IAA from degraded NCs are also discussed at length. � 2022 Elsevier B.V.Publication Influence of Seed Biopriming and Vermiwash Treatment on Tomato Plant's Immunity and Nutritional Quality upon Sclerotium rolfsii Challenge Inoculation(Springer, 2021) Rajput, Rahul Singh; Singh, Jyoti; Singh, Prachi; Vaishnav, Anukool; Singh, Harikesh BahadurTomato is an important nutritional vegetable crop and its nutrient contents are affected by both biotic and abiotic stresses. The main objective of this study was to determine the effect of seed biopriming with Trichoderma pseudokoningii BHUR2 and vermiwash treatment on nutrient content of tomato and defense response against Sclerotium rolfsii under heat stress condition. The combined application of T. pseudokoningii BHUR2 and vermiwash increased fresh weight of root (4.8-fold) and shoot (5.8-fold), dry weight of root (6.9-fold) and shoot (6.4-fold) and number of fruits per plant (4.2-fold) as compared to control under S. rolfsii inoculated condition. Plants treated with T. pseudokoningii BHUR2 and vermiwash exhibited higher defense response against S. rolfsii, mediated by higher activity of superoxide dismutase (3.57-fold), peroxidase (2.05-fold) and phenylalanine ammonia lyase (2.98-fold) enzymes and accumulation of total phenol content (5.35-fold) as compared to control plants. In addition, combined treatment was found to have a positive impact on nutritional status (N, P, K and Ca and lycopene, total soluble sugar and total protein) in tomato fruit. These results suggest potential of T. pseudokoningii BHUR2 and vermiwash in enhancing tomato immunity against S. rolfsii under heat stress condition, which was due to (1) induction in the antioxidant activity and phenylpropanoid pathway, which minimize oxidative damage and reduce pathogen infection and (2) significant improvement in nutrient content leads to better plant growth. The formulation of Trichoderma BHUR2 can be used for field application to mitigate heat stress in plants. � 2020, Springer Science+Business Media, LLC, part of Springer Nature.Publication Manoeuvring Soil Microbiome and Their Interactions: A Resilient Technology for Conserving Soil and Plant Health(Springer Singapore, 2021) Rashid, Md. Mahtab; Akhtar, Nishar; Teli, Basavaraj; Bajpai, Raina; Vaishnav, AnukoolThe soil microbial community hugely affects the growth and development of the plants through direct or indirect interactions. The rhizospheric microbial community dwelling in the soil are major drivers of this phenomenon. Manipulation of soil microbial population and community through various treatments of an array of beneficial microbes such as plant growth-promoting rhizobacteria, plant growth-promoting fungi, endophytic bacteria, biocontrol agents, etc. helps in alleviating various abiotic and biotic stresses of the plants. This, in turn, leads to the achievement of the yield which is close to the potential yield of the crop. Apart from increasing the yield of the crop, some of the beneficial microbes also enhance the nutrient content in the soil and availability of certain minerals to the plants eventually leading to conservation of soil health. Thus, manipulation of plant�soil microbiome paves the way for sustainable and green agriculture without imparting excessive monetary expenses, thereby creating increased crop production and embellishment of soil health. This chapter will so focus on the strategies and methods that are adopted to manipulate the plant�soil microbiome interactions, various mechanisms that are involved in the interactions, and the impact of this technology on the plant and soil. � The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021.Publication New and future developments in microbial biotechnology and bioengineering: Sustainable agriculture: Revitalization through organic products(Elsevier, 2022) Singh, Harikesh Bahadur; Vaishnav, AnukoolNew and Future Developments in Microbial Biotechnology and Bioengineering: Sustainable Agriculture: Revitalization through Organic Products provides a comprehensive overview of different organic products which work as plant biostimulants, i.e., protein hydrolysates, chitosan, microbial derived exopolysaccharides, pectin, nanoparticles, etc. In addition, detailed insights in their mechanisms for plant growth promotion and stress alleviation are covered. This volume further discusses the extraction and formulation of organic products for use in sustainable agriculture. The application of microbial derived secondary metabolites in crop protection is also extensively covered. This book will be ideal for agrochemists, biotechnologists, biochemists, industrialists, researchers and scientists working on organic farming. � 2022 Elsevier Inc. All rights reserved.Publication
