Browsing by Author "Singh U.B."
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Item Bacillus spp.: Nature�s Gift to Agriculture and Humankind(Springer, 2024) Vishwakarma S.K.; Ilyas T.; Shahid M.; Malviya D.; Kumar S.; Singh S.; Johri P.; Singh U.B.; Singh H.V.The productivity of crops is heavily depending on microbial communities present in rhizospheric soil; within the last few decades, PGPR has emerged as significant and promising tools for the sustainable agriculture practices. PGPR related to Bacillus spp. as symbiotic with plant roots or free-living in rhizosphere contribute significantly to the viability, development, and yield of plants under biotic and abiotic challenges. The Bacillus species are rod-shaped, Gram-positive, endosporic, aerobic, or facultative anaerobic and ubiquitous in nature. Many Bacillus species, e.g., B. megaterium, B. circulans, B. coagulans, B. subtilis, B. azotofixans, B. macerans, B. velezensis, etc. are extensively researched for their PGPR actions. Enhancement of nutrient uptake (N, P, K, and other vital minerals) and regulation of plant hormones are direct actions of PGPR, while promoting plant growth by inhibiting plant pathogen and induction of ISR are indirect actions of PGPR. The genus Bacillus holds largest share in microbe-based agricultural and commercial products. Due to the greater efficacy of production of metabolites and spore-forming nature of Bacillus spp., which increases the life span of cells in commercially manufactured products, Bacillus-based biofertilizers are more active than Pseudomonas-based formulations. The Bacillus species are frequently regarded as an ideal candidate for bioformulations because of their rapid growth, ease of handling, and better colonizing abilities. The Bacillus-based bioformulations for broad-spectrum application against several biotic and abiotic issues are also addressed. In this chapter we will discuss about the mechanism of Bacillus-mediated crop protection and their wide application. PGPR traits of Bacillus are discussed in terms of nutrient uptake, siderophore production, stimulation and production of phytohormone and volatile organic compounds (VOCs), antimicrobial compounds, CRY proteins, and abiotic and biotic stress tolerance. Induction of induced systemic resistance (ISR) in Bacillus inoculated plants and its molecular mechanism is also discussed in this chapter. Bacillus-mediated abiotic and biotic stress tolerance in different host, possible mechanisms, and their effects are also discussed. � The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.Item Bacillus subtilis-Mediated Induction of Disease Resistance and Promotion of Plant Growth of Vegetable Crops(Springer, 2024) Kumar S.; Anjali; Arutselvan R.; Masurkar P.; Singh U.B.; Tripathi R.; Bhupenchandra I.; Minkina T.; Keswani C.Vegetable crops are the major nutrient source of food worldwide and are considered as perishable crops compared to cereal, oilseed, and legume crops. They play a crucial role in daily human life because they contain a plethora of immunity-boosting compounds like vitamins, proteins, carbohydrates, and crucial macro- and micronutrients important for human life. India contributes 16% global vegetable crop production, making it as second-largest producer globally. Vegetable crop production is significantly limited because, during their whole lives, they are attacked by an armada of noxious pathogens that reduce quality and quantity as well as suppress the current food supply. Synthetic chemicals are frequently used, which has detrimental impacts on macro- and microflora as well as the environment and human wellbeing. A continuous increment in the population of resistant pathogens to chemicals puts pressure on pathologists to investigate novel, sustainable, and best alternative methods to combat dangerous microbes. From the various kinds of plant disease management prospects, the implication of plant growth-promoting rhizobacteria, i.e. PGPRs, is becoming an effective substitute strategy worldwide because of their environmentally friendly nature. One of the most promising PGPRs representing sustainable agriculture growth is Bacillus subtilis, which has been suggested as a potential tool for combating harmful vegetable diseases with respect to promoting plant health and growth. B. subtilis has the ability to produce a diverse range of compounds to promote plant growth and suppress pathogen ingression, which makes it a potential candidate. Furthermore, B. subtilis enhances plant immunity against pathogen infection by triggering the response via induced systemic resistance (ISR). Additionally, B. subtilis promotes plant growth via different mechanisms of action, such as nitrogen fixation, phytohormonal production, and phosphate solubilisation. In this chapter, a comprehensive study on the application of B. subtilis has been emphasized, with a focus on uses in the promotion of plant growth and controlling vegetable crop health issues. It would undoubtedly assist vegetable growers in reducing their reliance on agrochemicals while also providing profound perceptions and highlights on the environmentally friendly management of vegetable diseases. Farmers will be benefitted from cost-effective management once they have a better understanding of the management strategy. � The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.Item Does Group Maturity Affect Savings and Investment Behaviour of Women: Empirical Investigation of Self-Help Groups in Uttar Pradesh(SAGE Publications Ltd, 2024) Gupta T.; Singh U.B.The aim of this study is to understand the impact of group maturity (age) on savings and investment behaviour of self-help group (SHG) members. Based on the survey data of 300 SHG members, the study finds that as groups mature or get older there is a three-fold rise in the share of household savings being diverted to savings in the SHGs. The results of the propensity score matching (PSM) reveal that group maturity has a positive impact on the per capita savings of member households. Furthermore, the usage of bank loans for a majority of beneficiaries distinctly shifts from consumption purposes to income-generating activities as the group becomes more mature. � The Author(s) 2023.Item Exploring the Potentiality of Bacillus amyloliquefaciens as a Prominent Biocontrol Agent: A Comprehensive Overview(Springer, 2024) Ilyas T.; Vishwakarma S.K.; Shahid M.; Malviya D.; Kumar S.; Singh S.; Johri P.; Singh U.B.; Singh H.V.One of the most potential bacteria for plant growth promotion with minimal adverse reactions is Bacillus amyloliquefaciens. The plant growth-promoting (PGP) mechanisms of B. amyloliquefaciens have received a great deal of attention since it is a highly effective biofertiliser and biocontrol agent in agriculture. In this work, we studied B. amyloliquefaciens�s PGP processes as well as the present restrictions on its use in agriculture. Primarily, B. amyloliquefaciens can increase the availability of soil nutrients by increasing the delivery of nitrogen, solubilisation of potassium and phosphate, and the production of siderophores. Subsequently, B. amyloliquefaciens can alter the soil microbial community by increasing the accessibility of minerals and enhancing the environment for plant growth. Additionally, B. amyloliquefaciens can also emit hormones and volatile organic compounds (VOCs) linked to plant cell proliferation and root development, which would enhance plants� ability to absorb nutrients. B. amyloliquefaciens can also help in increasing the plant resistance to biotic stressors caused by soil pathogens by competing for nutrients and functions, creating compounds such cyclic lipopeptides and VOCs that directly combat pathogens and system resistance in the plants. Similar to this, B. amyloliquefaciens inoculation can stimulate plant growth by altering the host plant�s genetic makeup, chemistry, and physical structure to make it more resilient to abiotic stressors. It is additionally suggested that in future research, greater attention should be made to nitrogen absorption processes of plants using improved methodologies in varied soil conditions and locations. � The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.Item Unraveling the role of antimicrobial peptides in plant resistance against phytopathogens(Springer Nature, 2024) Kumar S.; Behera L.; Kumari R.; Bag D.; Sowmya V.; Keswani C.; Minkina T.; Bouket A.C.; Dutta P.; Nehela Y.; Rohini; Singh U.B.; Bairwa A.; Harish; Sahoo A.; Swapnil P.; Meena M.The current reports on phytopathogens multidrug resistance have become a significant issue for plant health and global food security. Antimicrobial peptides (AMPs) have recently gained generous attention as potential alternatives to prevent plant disease resistance because of their potent, multifarious antimicrobial activity. AMPs are low-weight protein molecules. Living organisms secrete a wide range of AMPs, with some synthesised by canonical gene expression, known as ribosomal AMPs, and non-ribosomal AMPs, synthesised by modular enzyme-generating systems. Plants produce an array of AMPs, yet they are still unknown to many infection processes of causal agents. Plant-derived AMPs have a wide range of structures and functions, and they induce an innate immune system in plants. The biologically active AMPs in plants mainly depend on direct and indirect interactions with membrane lipids. Transgenic plants have expressed several AMPs, the basis for the model of new synthetic analogues, to provide support against diseases. These peptides have shown significant ability to manage plant diseases and can provide an eco-friendly alternative to hazardous conventional methods. Here, we have a comprehensive study on AMPs to identify their role in plant pathogen stress suppression activities and their mode of action. This would surely facilitate a bottomless insight into AMPs' mode of action against pathogen infections. An improved understanding of the mechanism will facilitate the development of the next generation of antimicrobial peptides, potentially employing a multitargeted approach. � The Author(s) 2024.Item Unraveling the Seed Bio-priming Contours for Managing Plant Health(Springer, 2024) Kumar S.; Arutselvan R.; Greeshma K.; Bodhankar S.; Akash A.U.; Prasad V.S.S.K.; Nehela Y.; Singh U.B.; Bhupenchandra I.; Sen A.; Rajput L.S.; Burachevskaya M.; Minkina T.; Keswani C.From germination to maturity, crops face myriad stresses thereby threatening food security. The foundation of modern agriculture rests on the status of seed health and resilience. Hence, developing highly efficient, low-cost, farmer-friendly, and sustainable approaches for improving seed health and performance under both field and greenhouse conditions. Seed bio-priming with plant beneficial microorganisms (++; mutualistic) improves the physiological, molecular, and stress tolerance functions of the seeds. This process allows the microorganisms adhere to the seed coat and establish an early relationship with the radicle, thereby forming the first line of defense against any external threat. Seeds bio-primed by mutualistic rhizomicroorganisms stimulate plant immunity by inducing the biosynthesis of defense-related proteins, phytohormones, antioxidants, polyphenols, etc. This review maps the various functional and applied aspects of seed bio-priming on the overall plant health under stressed environments. Furthermore, it critically examines the modulation of biochemical and molecular mechanisms for establishing redox homeostasis. � The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.
