Ajar Nath YadavINTI International University | inti · Faculty of Life Sciences
Ajar Nath Yadav
Ph.D. Microbial Biotechnology
Microbial Biotechnology for Agro-enviornmental Sustainability
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481
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Introduction
Skills and Expertise
Additional affiliations
Education
December 2010 - January 2015
July 2007 - July 2009
July 2003 - August 2006
Publications
Publications (481)
Archaea are unique microorganisms that are present in ecological niches of high temperature, pH and salinity. A total of 157 archaea were obtained from thirteen sediment, water and rhizospheric soil samples collected from Rann of Kutch, Gujarat, India. With an aim to screen phosphate solubilizing archaea, a new medium was designed as Haloarchaea P...
The diversity of culturable, cold-active enzymes producing Bacilli was investigated from three sub-glacial lakes of north western Indian Himalayas. Amplified ribosomal DNA restriction analysis (ARDRA) using three restriction enzymes Alu I, Msp I, and Hae III led to the clustering of 136 Bacilli into 26, 23, and 22 clusters at 75% similarity index f...
The diversity of culturable, aerobic and heterotrophic Bacillus and Bacillus derived genera (BBDG) was investigated in various extreme environments (including thermal springs, cold deserts, mangroves, salt lakes, arid regions, salt pans and acidic soils) of India. Heat treatment, followed by enrichment in different media led to a total of 893 bacte...
To study culturable bacterial diversity under subzero temperature conditions and their possible functional annotation, soil and water samples from Leh Ladakh region were analysed. Ten different nutrient combinations were used to isolate the maximum possible culturable morphotypes. A total of 325 bacterial isolates were characterized employing 16S r...
Microbial communities in different samples collected from cold deserts of north western Himalayas, India, were analyzed using 16S rRNA gene sequencing and phospholipid fatty acids (PLFA) analysis. A total of 232 bacterial isolates were characterized employing 16S rDNA-Amplified Ribosomal DNA Restriction Analysis with the three restriction endonucle...
The use of indigenous entomopathogenic nematodes
(EPNs) as biological control agent can provide the best
way for overall insect pest management in lieu of environmental stability with their wide range of benefits and less
side-effect on other organisms. The identification and mass
culturing are pivotal for field applications of these benefi
cia...
Phytophthora blight, caused by Phytophthora capsici, is a devastating disease threatening the bell pepper industry. This pathogen affects all parts of plants including causing rot, blight, significant harm and losses the Capsicum species. In the present study, symptoms of blight and damping off were noted during two years of field surveys, February...
On earth, soil is one of the most essential parts of nature which plays critical roles in plant growth, water flow, waste products recycling and provides habitats to various organisms. Soil is the combination of organic matter, air, water minerals, and sixteen different essential nutrient elements which are categorized into primary macronutrients,...
A polyphagous nocturnal pest Spodoptera litura (Fabr.) commonly called armyworm, infests about 150 plant species across 44 families worldwide, with nearly 60 plant species affected just in India. The majority of leaf tissues are consumed by the larvae and only the stem and side shoots will remain in the field. They entirely consume the interior con...
Recognition of the fact that bacterial biofilm might contribute to the development of diseases has prompted a greater emphasis on identifying conditions, that could be linked to the biofilm formation. Microbial biofilms have raised significant concerns within the healthcare, medical, and food industries due to their inherent resistance to conventio...
Pesticides have health consequences for humans, living organisms, and ecosystems. Research on biological management, with a primary focus on entomopathogens, has been accelerated by the rise in issues such as pesticide residue, soil degradation, and pest resistance. Entomopathogenic nematodes (EPNs) are among the most frequently used and commercial...
The present investigation aims to isolate nitrogen fixing endophytic bacteria from cereals crops and their potential role in plant growth promotion of wheat (Triticum aestivum L.) for sustainable growth. In the present investigation, endophytic bacteria were isolated from different cereal crops growing in the Divine Valley of Baru Sahib, Himachal P...
Over the years, chemical-based insecticides have been used to enhance crop yield in the agricultural industry. However, the hazards associated with these insecticides have highlighted the need for an alternative method that is economical, eco-friendly, and safe. In this investigation, the efficacy of various biological materials, such as Neem kavac...
A new area of biotechnology is nanotechnology. Nanotechnology is an emerging field that aims to develope various substances with nano-dimensions that have utilization in the various sectors of pharmaceuticals, bio prospecting, human activities and biomedical applications. An essential stage in the development of nanotechnology is the creation of na...
Maize in water-deficient regions faces growth challenges due to drought stress, disrupting water relations and nutrient absorption. This study aims to evaluate the potential of isolated plant growth-promoting rhizobacteria (PGPR) in alleviating drought stress effects and regulating antioxidant enzymes in maize. In an in vitro study, eight rhizobact...
Heavy metal pollution is one of the modern environmental problems that contaminate soil, water, and air. Heavy metal pollution not only results in significant crop yield losses, but also poses health risks. When subjected to heavy metal toxicity, which happens when the quantity of particular heavy metals in the soil or water exceeds their tolerance...
In the present scenario, growing population demands more food, resulting in the need for sustainable agriculture. Numerous approaches are explored in response to dangers and obstacles to sustainable agriculture. A viable approach is to be exploiting microbial consortium, which generate diverse biostimulants with growth-promoting characteristics for...
Indiscriminate use of chemical fertilizers increases agricultural productivity but on the other hand they harms the health of environment and humans. The multifunctional plant growth promoting bacterial strains could be an ideal alternative to synthetic chemical fertilizers. Looking into the benefits of plant growth promoting bacteria, the present...
Agriculture production is greatly impacted by abiotic stresses, which affect the plant growth by ion toxicity, hormonal and nutritional imbalance, and physiological and metabolic changes. Plant-associated plant growth-promoting (PGP) microbes help in plant growth promotion and mitigation of the abiotic stress-induced changes and maintain agricultur...
Agro-environmental sustainability is based upon the adoption of efficient resources in agro-practices that have a nominal impact on the ecosystem. Insect pests are responsible for causing severe impacts on crop productivity. Wide ranges of agro-chemicals have been employed over the last 50 years to overcome crop yield losses due to insect pests. Bu...
In the past few decades, the pressure of higher food production to satisfy the demand of ever rising population has inevitably increased the use synthetic agrochemicals which have deterioration effects. Biostimulants containing beneficial microbes (single inoculants and microbial consortium) were found as an ideal substitute of synthetic chemical f...
Plant growth promoting bacterial strains were used as bioinoculants on cereal crops to improve plant growth and plant productivity. Crop responses to inoculation are complex because bacteria are not compatible with each other. Therefore, it is necessary to increase our understanding of the microbial ecology of crop rhizosphere under various agricul...
The field of nanotechnology has the mysterious capacity to reform every subject it touches. Nanotechnology advancements have already altered a variety of scientific and industrial fields. Nanoparticles (NPs) with sizes ranging from 1 to 100 nm (nm) are of great scientific and commercial interest. Their functions and characteristics differ significa...
Medicinal plants constitute a diverse range of the endophytic microbes of economical importance. The endophytic microbial communities have a huge potential in promoting the growth and maintaining the health of their host. The present investigation highlights the isolation of endophytic bacteria from the medicinal plants growing around Baru Sahib re...
Edible mushrooms are gaining popularity for their rich nutrition, bioactive compounds and global accessibility. Mushroom spawn, is crucial for successful mushroom growth, impacting yield and quality. Therefore, the study was undertaken to prepare and characterise quality spawn of six mushroom species viz., Hypsizygus ulmarius, Pleurotus sajor-caju,...
The Bacillus genus has emerged as an important player in modern agriculture, revolutionizing plant growth promotion through recent advances. This review provides a comprehensive overview of the critical role Bacillus species play in
boosting plant growth and agricultural sustainability. Bacillus genus bacteria benefit plants in a variety of ways, a...
Nanotechnology is the most fascinating field in modern scientific society, which plays multifunctional roles in different dimensions. Particles having a size between 1 nm and 100 nm are called nanoparticles (NPs). NPs contain remarkable physical and chemical characteristics that enable them to perform a variety of functions. The structural alterati...
Exploring medicinal plants for their natural products to benefit humanity has been a practice since ancient times. Berberis aristata, also known as tree turmeric or Indian barberry, has a dominant spot in conventional medicine for 2500 plus years. In the latter years, this particular species has gained prime attention in pharmaceutical zone due to...
Probiotics are living microorganisms known for their beneficial properties and have been extensively researched and utilized in various products worldwide. These microorganisms have essential nutritional needs and exhibit significant functional qualities. Probiotics have been employed to enhance the well-being of both animals and humans by influenc...
The present study was carried out in laboratory conditions (25 ± 10°C and 70% humidity) for studying the bioefficacy of entomopathogenic fungi and Bacillus thuringiensis against Spodoptera litura using the leaf dip method. The insecticidal attributes of three different commercial bioinsecticides (Bacillus thuringiensis 0.5% W.P., Beauveria bassiana...
Plant growth-promoting rhizobacteria (PGPR) has been shown to govern a number of aspects of plant development, enabling the plant to survive and adapt to its surroundings, in response to unfavorable conditions that are abiotic in nature. As a staple crop, rice is particularly vulnerable to a variety of abiotic stresses including drought, salt, heav...
The earth’s surface consists of arid, semi-arid, and hyper-arid lands, where life is profoundly challenged by harsh conditions such as temperature fluctuations, water scarcity, high levels of solar radiations, and soil salinity. The harsh environmental conditions pose serious consequences on plant survival, growth, and productivity accessibility of...
Fungi are a unique group of microbes that exist in all of the world’s niches having different habitats and environments. They are known to interact with various species present on the earth, including plants. Fungi interact with different niches of plants such as roots (rhizosphere), tissue, and internal spaces (endophytic) and surfaces (epiphytic)...
Carotenoids are lipid soluble natural pigments found in various plants, animals, and microbes giving them their yellow, orange, or red hue. Carotenoids have been linked to a variety of health benefits as bioactive compound including antioxidant properties, reduced risk of certain cancers, improved ocular and cardiovascular health, and improved immu...
In the past few years, people have been more conscious of a healthy diet to sustain their health. The plant’s bioactive compounds play a vital role by exhibiting functional activity and preventing many diseases. Bioactive compounds are extra nutritive constituents that typically occur in small quantities in foods and provide beneficial health prope...
Millets, often overshadowed by larger cereal counterparts, are undergoing a renaissance in the realm of nutrition and health. This review delves into their captivating nutritional and nutraceutical potential, uncovering their secrets and highlighting their importance in contemporary diets. Millets emerge as nutritional powerhouses, providing a well...
Plants have been known to interact with different biotic and abiotic agents existing in the environment which forms a beneficial mutualism. Among various agents, interaction of plants with microbes is one of the significant interactions which have global implication too. Microbes interact with belowground (rhizosphere), aboveground (phyllosphere) a...
Photoautotrophic microbes are distributed globally and have been here since long (3.5 billion years). These are among the early organisms which included cyanobacteria and various types of algae. These organisms have been found to be rich in important components of food and nutraceuticals which are being probed further and used globally, in addition...
Fungi, especially the endophytic fungi which live in association with the plants, have been known to mimic their hosts in production of structurally diverse biologically active compounds. Bioactive compounds are of great interest as new lead structures for medicine and plant protection. Furthermore, they play an important role in community balancin...
Abiotic and biotic stresses adversely impact the growth and productivity of the crops globally. Stressful environmental conditions affect the plants morphological and physiological characteristics. Increase in the ethylene production and its inhibitory effect on root development is one of the major challenges under stressed conditions. The associat...
Agriculture is the backbone of developing countries, which plays an essential role in primary drivers of economy. The increasing use of chemical fertilizers and toxic insecticides endangers the health of human, plant soils, and the environment. Microbial insecticides have been implemented in current scenario for crop protection. Biological agents f...
Phosphorus is needed by plants for their growth and development as well as different metabolic activities simultaneously being the major yield limiting plant nutrient. The application of the phosphatic fertilizers is the only alternative to prevent the phosphorus deficiency in the plants but the over use of the fertilizers depletes the soil fertili...
Energy and the environment are two major challenges for our modern civilization and solar energy plays an important role among the renewable energy alternatives due to its availability and eco-friendly nature. One of the prominent routes for the conversion of solar energy into electrical energy is photo-voltaic technology. The dye sensitized solar...
Endophytic microbes are plant-associated microorganisms that reside in the interior tissue of plants without causing damage to the host plant. Endophytic microbes can boost the availability of nutrient for plant by using a variety of mechanisms such as fixing nitrogen, solubilizing phosphorus, potassium, and zinc, and producing siderophores, ammoni...
Endophytic fungi are known to be treasuretrove of bioactive metabolites. A total of 13 fungal endo-phytes were isolated from leaves and stem of nine medicinalplants on different growth media. All the 13 isolates werescreened for the production of secondary metabolites andantimicrobial activities against pathogenic organisms: Bacil-lus cereus (MTCC-...
(1) Background: Increasing salinity, further potentiated by climate change and soil degradation, will jeopardize food security even more. Therefore, there is an urgent need for sustainable agricultural practices capable of maintaining high crop yields despite adverse conditions. Here, we tested if wheat, a salt-sensitive crop, could be a good reser...
Cold stress leads to the disruption of the cellular homeostasis in plants and generation of reactive oxygen species (ROS) and productivity losses. In the present study, 94 psychrotrophic phosphorus-solubilizing bacteria with multiple plant growth-promoting (PGP) capabilities were isolated from rhizosphere of wheat. The most efficient strain EU-KL94...
Potassium silicate rock is one of the main sources of soil potassium (K), which is the essential macronutrients for plant growth. Potassium is absorbed in the form of K+ ion by plants. The amount of K+ is a limited factor, thus excessive quantity of K fertilizer is being applied in agricultural field worldwide. The excessive K fertilizers applicati...
The quest for increasing agricultural yield due to increasing population pressure and demands for healthy food has inevitably led to the indiscriminate use of chemical fertilizers. On the contrary, the exposure of the crops to abiotic stress and biotic stress interferes with crop growth further hindering the productivity. Sustainable agricultural p...
Agrochemicals provide vital nutrients for plant growth to enhance crops yield, but they can pose major agro-environmental issues. Bioinoculants have attracted more and more attention due to their cost effective-eco-friendly and pollution-free characteristics. The aim of this study was to determine whether using a variety of bioinoculants that inclu...
The use of plant growth promoting microbes (PGP) microbes in agriculture has increased due to negative impact of the chemical fertilizers. PGP microbes enhance the plant growth and productivity by diverse mechanisms such as the biological nitrogen fixation; solubilization of phosphorus, potassium and zinc; production of siderophores, plant growth r...
Globally, man-made agrochemicals plays crucial role in plant growth promotion and boost crop yield. The agrochemicals overuse leaves the detrimental damage on the environment and humans. Biostimulants developed from single or multiple microbes (archaea, bacteria, and fungi) could be the appropriate alternative of agrochemical which sustains the agr...
Nowadays, multidrug antimicrobial resistance is a very common issue globally. Antimicrobial resistance is fueling the fire, and it has been noted that infectious disease incidence and deaths are rising throughout the world. Many pathogens have been reported to develop resistance to these synthetic and semi-synthetic drugs leading to minimized effic...
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants that are usually found in the soil originating from various anthropogenic and natural activities. Soil accumulated PAHs may disrupt the food web and pose adverse impacts on soil and human health. Thus, elimination of PAHs from soil in a feasible and eco-friendly manne...
Abiotic stress poses a severe danger to agriculture since it negatively impacts cellular homeostasis and eventually stunts plant growth and development. Abiotic stressors like drought and excessive heat are expected to occur more frequently in the future due to climate change, which would reduce the yields of important crops like maize, wheat, and...
Low-temperature stress can seriously impair plant physiology. Chilling injury leads to a complex array of cellular dysfunctions, and symptoms include chlorosis, sterility, loss of vigor, wilting, and even death of the plants. Furthermore, phosphorus limitations additionally halt the growth of plants. Low-temperature adaptive plant growth–promoting...
Background
Insect pests cause substantial agriculture losses annually, and their regulation through chemical pesticides instigates a prolonged detrimental impact on the environment and hum