Microbes as Biocontrol Agents

Babbal,; Adivitiya,; Khasa, Yogender Pal

doi:10.1007/978-981-10-3473-2_24

Cited by 14 publications

(3 citation statements)

References 174 publications

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“…Some volatile organic compounds (VOCs) produced by PGPF otherwise control the development of crop plants, and the signaling pathways interceding VOC sensing are not fully apprehensible. From Trichoderma spp., the prima biological antifungal VOC isolated was 6-pentyl-2H-pyran-2-one (6-PP) [ 142 ], which stimulates A. thaliana root growth through auxin signaling and the ET response modulator EIN2 [ 143 ]. Hashem, et al [ 144 ] proclaimed that cytokinin (CK) signaling performs specific functions in growth improvement when subjected to Bacillus subtilis GB03 VOCs.…”

Section: Crop Plants Establish Beneficial Microbes In the Rhizospherementioning

confidence: 99%

Fungi That Promote Plant Growth in the Rhizosphere Boost Crop Growth

Adedayo

Babalola

2023

JoF

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The fungi species dwelling in the rhizosphere of crop plants, revealing functions that endeavor sustainability of the plants, are commonly referred to as ‘plant-growth-promoting fungi’ (PGPF). They are biotic inducers that provide benefits and carry out important functions in agricultural sustainability. The problem encountered in the agricultural system nowadays is how to meet population demand based on crop yield and protection without putting the environment and human and animal health at risk based on crop production. PGPF including Trichoderma spp., Gliocladium virens, Penicillium digitatum, Aspergillus flavus, Actinomucor elegans, Podospora bulbillosa, Arbuscular mycorrhizal fungi, etc., have proven their ecofriendly nature to ameliorate the production of crops by improving the growth of the shoots and roots of crop plants, the germination of seeds, the production of chlorophyll for photosynthesis, and the abundant production of crops. PGPF’s potential mode of action is as follows: the mineralization of the major and minor elements required to support plants’ growth and productivity. In addition, PGPF produce phytohormones, induced resistance, and defense-related enzymes to inhibit or eradicate the invasion of pathogenic microbes, in other words, to help the plants while encountering stress. This review portrays the potential of PGPF as an effective bioagent to facilitate and promote crop production, plant growth, resistance to disease invasion, and various abiotic stresses.

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Section: Crop Plants Establish Beneficial Microbes In the Rhizospherementioning

confidence: 99%

Fungi That Promote Plant Growth in the Rhizosphere Boost Crop Growth

Adedayo

Babalola

2023

JoF

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“…To determine the best concentration of each inductor, three concentrations were chosen based on previous studies. For IPTG, concentration often ranges from 0.10 mmol L −1 to 1.00 mmol L −1 [21][22][23][24] while lactose concentration varies from 10 g L −1 to 18 g L −1 [25][26][27]. Considering the reported concentrations, IPTG was evaluated at 0.10 mmol L −1 , 0.45 mmol L −1 and 1.00 mmol L −1 and lactose was evaluated at 10 g L −1 , 14 g L −1 and 18 g L −1 .…”

Section: Production Of L-asnase In Orbital Shakermentioning

confidence: 99%

Development of Processes for Recombinant L-Asparaginase II Production by Escherichia coli Bl21 (De3): From Shaker to Bioreactors

et al. 2020

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Since 1961, L-asparaginase has been used to treat patients with acute lymphocytic leukemia. It rapidly depletes the plasma asparagine and deprives the blood cells of this circulating amino acid, essential for the metabolic cycles of cells. In the search for viable alternatives to produce L-asparaginase, this work aimed to produce this enzyme from Escherichia coli in a shaker and in a 3 L bioreactor. Three culture media were tested: defined, semi-defined and complex medium. L-asparaginase activity was quantified using the β-hydroxamate aspartic acid method. The defined medium provided the highest L-asparaginase activity. In induction studies, two inducers, lactose and its analog IPTG, were compared. Lactose was chosen as an inducer for the experiments conducted in the bioreactor due to its natural source, lower cost and lower toxicity. Batch and fed-batch cultures were carried out to reach high cell density and then start the induction. Batch cultivation provided a final cell concentration of 11 g L−1 and fed-batch cultivation produced 69.90 g L−1 of cells, which produced a volumetric activity of 43,954.79 U L−1 after lactose induction. L-asparaginase was produced in a shaker and scaled up to a bioreactor, increasing 23-fold the cell concentration and thus, the enzyme productivity.

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“…However, the definition of biological control has further been elaborated as "the use of natural or modified organisms, genes or gene products to reduce the effects of undesirable organisms such as plant pathogens and to favour desirable organisms such as crops. In the last three decades, numerous microorganisms have been examined for their antagonistic activity against various bacterial and fungal plant pathogens, which resulted in increased use of microorganism based biopesticides for the management of various crop diseases (Jayarajan and Nakkeran, 2000;Kong, 2017;Babbal et al 2017;Poveda et al 2021;Bonaterra et al 2022;Boro et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Harnessing fungal biocontrol agents for the management of plant diseases

Mathivanan¹

2023

JMycR

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Plant diseases are considered as one of the serious limiting factors for the successful cultivation/ plantation of various agricultural, horticultural and forestry plants. As the yield losses are being estimated in alarming economic threshold levels every year, it is imperative to use appropriate control measures to manage the plant diseases. Although, chemical control is being used extensively by the farmers, it is exhibiting serious demerits and hence biological control is gaining momentum. Various bacterial and fungal species were already identified as promising biocontrol agents and are being used for the management of plant diseases. Among them, Trichoderma spp. are the most promising biocontrol agents and they are being mass multiplied, formulated and commercially available for farm applications. Therefore, research efforts were made to identify a promising Trichoderma, develop into biofungicide formulation and distribute the farmers for the management of root diseases in different crops. An effective strain of Trichoderma viride was isolated from soil, multiplied using molasses yeast medium and formulated with talc powder as biofungicide. This formulation was distributed to the farmers in Andhra Pradesh and Karnataka states for the management of root diseases in different crops. Impact assessment study carried out with the farmers have revealed that the application of T. viride effectively controlled the soil-borne root diseases in cotton, chilli, sugarcane and acid lime. Distribution of T. viride in large scale made tremendous impact on farmers in Andhra Pradesh, who are at present coming forward to buy the commercial products of biocontrol agents from the local market.

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Microbes as Biocontrol Agents

Cited by 14 publications

References 174 publications

Fungi That Promote Plant Growth in the Rhizosphere Boost Crop Growth

Fungi That Promote Plant Growth in the Rhizosphere Boost Crop Growth

Development of Processes for Recombinant L-Asparaginase II Production by Escherichia coli Bl21 (De3): From Shaker to Bioreactors

Harnessing fungal biocontrol agents for the management of plant diseases

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