Biofertilizers as substitute to commercial agrochemicals

Bhattacharyya, Chandrima; Roy, Rupsa; Tribedi, Prosun; Ghosh, Anupama; Ghosh, Abhrajyoti

doi:10.1016/b978-0-08-103017-2.00011-8

Cited by 34 publications

(33 citation statements)

References 138 publications

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“…Moreover, crop production is shown to be already limiting at pH values below 5.5–6.5 48 . Under these agroclimatic conditions, plant growth-promoting rhizobacteria offer useful alternatives to agrochemicals for better growth and development of crop plants by direct as well as indirect mechanisms 2 . Tea rhizosphere harbors diverse plant growth-promoting rhizobacteria, which offer potential applications as biofertilizers in sustainable agricultural practice within a similar agroclimatic setup 12 – 16 , 18 , 49 .…”

Section: Resultsmentioning

confidence: 99%

“…A subset of these is beneficial to the plants in terms of promoting their growth. These bacteria, therefore, are very commonly referred to as plant growth-promoting rhizobacteria (PGPR) and serve as potential environment-friendly substitutes of chemical fertilizers 1 , 2 . Phytostimulating rhizobacteria, in general, do not show host specificity and can exhibit their growth-promoting features when associated with a broad range of hosts 3 .…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of plant growth promotion properties and induction of antioxidative defense mechanism by tea rhizobacteria of Darjeeling, India

Bhattacharyya

Banerjee

Acharya

et al. 2020

Sci Rep

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135

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A total of 120 rhizobacteria were isolated from seven different tea estates of Darjeeling, West Bengal, India. Based on a functional screening of in vitro plant growth-promoting (PGP) activities, thirty potential rhizobacterial isolates were selected for in-planta evaluation of PGP activities in rice and maize crops. All the thirty rhizobacterial isolates were identified using partial 16S rRNA gene sequencing. Out of thirty rhizobacteria, sixteen (53.3%) isolates belong to genus Bacillus, five (16.6%) represent genus Staphylococcus, three (10%) represent genus Ochrobactrum, and one (3.3%) isolate each belongs to genera Pseudomonas, Lysinibacillus, Micrococcus, Leifsonia, Exiguobacterium, and Arthrobacter. Treatment of rice and maize seedlings with these thirty rhizobacterial isolates resulted in growth promotion. Besides, rhizobacterial treatment in rice triggered enzymatic [ascorbate peroxidase (APX), catalase (CAT), chitinase, and phenylalanine ammonia-lyase (PAL)], and non-enzymatic [proline and polyphenolics] antioxidative defense reactions indicating their possible role in the reduction of reactive oxygen species (ROS) burden and thereby priming of plants towards stress mitigation. To understand such a possibility, we tested the effect of rhizobacterial consortia on biotic stress tolerance of rice against necrotrophic fungi, Rhizoctonia solani AG1-IA. Our results indicated that the pretreatment with rhizobacterial consortia increased resistance of the rice plants towards the common foliar pathogen like R. solani AG1-IA. This study supports the idea of the application of plant growth-promoting rhizobacterial consortia in sustainable crop practice through the management of biotic stress under field conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of plant growth promotion properties and induction of antioxidative defense mechanism by tea rhizobacteria of Darjeeling, India

Bhattacharyya

Banerjee

Acharya

et al. 2020

Sci Rep

Self Cite

135

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“…Despite the demonstrated effectiveness of synthetic hormones and fertilizers’ application in improving cherry yield and qualitative traits [ 22 , 23 ], their extensive use has become undesired as a consequence of the worldwide increasing consensus among scientists and policy makers that modern agriculture needs to meet new sustainability goals by reducing the adoption of environment-impacting agrochemical inputs [ 24 , 25 ]. In this respect, biostimulants are considered to be environmentally friendly, effective, alternative solutions to enhance plant vegetative growth, fruit yield and quality and to increase plant tolerance to abiotic stresses by modulating several aspects of plant physiology (photosynthesis, hormone metabolism, nutrient uptake and translocation, secondary metabolism, etc.)…”

Section: Introductionmentioning

confidence: 99%

Plant-Based Biostimulant as Sustainable Alternative to Synthetic Growth Regulators in Two Sweet Cherry Cultivars

Basile

Brown²,

Valdés³

et al. 2021

Plants

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Sweet cherry is a high value crop and the economic success of its cultivation depends not only on yield but also on fruit visual and nutritional quality attributes that influence consumer acceptability, as well as on fruit post-harvest performance and resistance to cracking. During the last few decades, cherry growers have tried to achieve these goals through exogenous applications of synthetic plant hormones and/or nutrients, but there is growing concern about the sustainability of the extensive use of these compounds in agriculture. For this reason, there is increasing interest in the possible adoption of different classes of biostimulants as sustainable alternatives to plant growth regulators. This research aimed to study the impact of foliar application of a novel tropical-plant extract, performed between full bloom and fruit set, on the yield and fruit quality of two important commercial sweet cherry cultivars, Kordia and Regina. The experimental design included a commercial control involving the application of a cytokinin promoter. In both cultivars, the tropical-plant extract induced significant increases in fruit yield. In addition, in the cultivar Kordia, the tropical-plant extract enhanced fruit calcium concentration, soluble solids content, flesh firmness, and skin color by 26.2%, 11.8%, 6.7%, and 12.0% (of fruits with mahogany skin color), respectively. Our results suggest that the tropical-plant extract tested as a biostimulant may be a sustainable and effective alternative to the exogenous application of synthetic hormones for sweet cherry cultivation.

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“…B. Sharma et al, 2013). These enzymes have been studied in many bacterial genera including Bacillus, Citrobacter, Enterobacter, Klebsiella, Proteus, Pseudomonas, Rhizobium, andSerratia (Behera et al, 2016, 2017;C. Bhattacharyya et al, 2020).…”

Section: Mechanisms Of P Solubilizing Plant Root Residing Bacteriamentioning

confidence: 99%

“…These synthetic fertilizers present a lot of problems in the environment. For instance, increased P from agricultural farms has been identified as a major course of eutrophication of surface body waters (C. Bhattacharyya et al, 2020;Youssef & Eissa, 2014).…”

Section: Introductionmentioning

confidence: 99%

Phosphate-Solubilizing Rhizobacteria: Diversity, Mechanisms, and Prospects in Sustainable Agriculture

Aloo¹,

Makumba²,

Mbega³

2020

Preprint

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Phosphorus (P) is the second-most important element after nitrogen that is required for plant growth. Although this element is abundant in most soils, it is rarely available in plant-accessible forms since most of it normally exists in soil in insoluble forms such as phosphates. In conventional agriculture, P is normally supplied as chemical fertilizer to satisfy plant P requirements. This, to a large extent, boosts plant production. However, chemical fertilizers are costly, have a huge carbon footprint, and are environmentally-unsustainable owing to the high energy requirements during their synthesis. Besides, P-containing agricultural run-offs contribute hugely to the eutrophication of water bodies and environmental degradation. Moreover, plants can consume only a small amount of chemically-supplied P since between 75 and 90% of this form of P normally get precipitated into complexes and rapidly become fixed in soil. These issues and concerns necessitate research into alternative and viable ways of supplying P to plants. Rhizobacteria have for decades been investigated in vivo and in planta as suitable tools in sustainable agriculture due to the plant-growth-promoting activities such as nutrients’ solubilization, nitrogen fixation, and production of phytohormones. Although a lot of research has been done on different nutrients-solubilizing rhizobacteria and their potential in sustainable agriculture, their mechanisms of action and prospects in sustainable agriculture remain to be fully understood. This review particularly focuses on the P solubilizing rhizobacteria and evaluates their diversity, mechanisms of action, and prospects in sustainable agriculture based on the present and future scenario of their application. Such information is useful in determining their potential and evaluating their prospects in promoting sustainable agricultural systems.

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Biofertilizers as substitute to commercial agrochemicals

Cited by 34 publications

References 138 publications

Evaluation of plant growth promotion properties and induction of antioxidative defense mechanism by tea rhizobacteria of Darjeeling, India

Evaluation of plant growth promotion properties and induction of antioxidative defense mechanism by tea rhizobacteria of Darjeeling, India

Plant-Based Biostimulant as Sustainable Alternative to Synthetic Growth Regulators in Two Sweet Cherry Cultivars

Phosphate-Solubilizing Rhizobacteria: Diversity, Mechanisms, and Prospects in Sustainable Agriculture

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