Growing more with less: Breeding and developing drought resilient soybean to improve food security

Dubey, Anamika; Kumar, Ashwani; Abd_Allah, Elsayed Fathi; Khan, M. L.

doi:10.1016/j.ecolind.2018.03.003

Cited by 84 publications

(45 citation statements)

References 111 publications

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“…While AMF and PGPR increase the phenolic contents (28%), defensive enzymes such as peroxidase, polyphenol oxidase, and superoxide dismutase (SOD), on the contrary, significantly reduce MDA and hydrogen peroxide (H 2 O 2 ) concentrations [88]. In plants treated with PGPR, under the drought and salinity stress, some metabolic changes have been observed in agricultural crop species such as wheat [88], tobacco [89], Brassica juncea [90], soybean [91] tomatoes, bell peppers, cucumbers [92], barley [93], and black gram [94]. Moreover, PGPR promotes the growth and productivity of plants by synthesis of different phytohormones like auxins and cytokinins [95].…”

Section: Pgpr-mediated Biochemical Changes In Crop Plantsmentioning

confidence: 99%

PGPR‐mediated induction of systemic resistance and physiochemical alterations in plants against the pathogens: Current perspectives

et al. 2020

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Plant growth‐promoting rhizobacteria (PGPR) are diverse groups of plant‐associated microorganisms, which can reduce the severity or incidence of disease during antagonism among bacteria and soil‐borne pathogens, as well as by influencing a systemic resistance to elicit defense response in host plants. An amalgamation of various strains of PGPR has improved the efficacy by enhancing the systemic resistance opposed to various pathogens affecting the crop. Many PGPR used with seed treatment causes structural improvement of the cell wall and physiological/biochemical changes leading to the synthesis of proteins, peptides, and chemicals occupied in plant defense mechanisms. The major determinants of PGPR‐mediated induced systemic resistance (ISR) are lipopolysaccharides, lipopeptides, siderophores, pyocyanin, antibiotics 2,4‐diacetylphoroglucinol, the volatile 2,3‐butanediol, N‐alkylated benzylamine, and iron‐regulated compounds. Many PGPR inoculants have been commercialized and these inoculants consequently aid in the improvement of crop growth yield and provide effective reinforcement to the crop from disease, whereas other inoculants are used as biofertilizers for native as well as crops growing at diverse extreme habitat and exhibit multifunctional plant growth‐promoting attributes. A number of applications of PGPR formulation are needed to maintain the resistance levels in crop plants. Several microarray‐based studies have been done to identify the genes, which are associated with PGPR‐induced systemic resistance. Identification of these genes associated with ISR‐mediating disease suppression and biochemical changes in the crop plant is one of the essential steps in understanding the disease resistance mechanisms in crops. Therefore, in this review, we discuss the PGPR‐mediated innovative methods, focusing on the mode of action of compounds authorized that may be significant in the development contributing to enhance plant growth, disease resistance, and serve as an efficient bioinoculants for sustainable agriculture. The review also highlights current research progress in this field with a special emphasis on challenges, limitations, and their environmental and economic advantages.

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Section: Pgpr-mediated Biochemical Changes In Crop Plantsmentioning

confidence: 99%

PGPR‐mediated induction of systemic resistance and physiochemical alterations in plants against the pathogens: Current perspectives

et al. 2020

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“…The prolongation of drought may lead to critical physiological and developmental changes in plants (Khan et al 2017;Hasan et al 2019). Drought causes various metabolic and physiological abnormalities in plants such as loss of cell turgor, cell shrinkage, photosynthetic reduction, and imbalance in mineral content (Choudhury et al 2017;Dubey et al 2018;Yang et al 2019). Plants undergo several physiological and morphological adaptations to survive during prolonged water shortage.…”

Section: Introductionmentioning

confidence: 99%

Insights into 28-homobrassinolide (HBR)-mediated redox homeostasis, AsA–GSH cycle, and methylglyoxal detoxification in soybean under drought-induced oxidative stress

Hasan

Ali

Soliman

et al. 2020

Journal of Plant Interactions

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Brassinosteroids (BRs) are well recognized for their defensive role in plants under abiotic stress conditions, but 28-homobrassinolide (HBR)-induced tolerance to drought stress has not been reported in soybean (Glycine max L.). The present study investigated the effect of HBR on soybean seedlings under drought stress. Drought stress suppressed growth and photosynthetic systems while increased the proline, glycine betaine (GB), anthocyanin, total phenolic (TP), and total flavonoid (TF) levels in soybean seedlings. HBR restricted reactive oxygen species (ROS) accumulation and decreased the hydrogen peroxide (H 2 O 2) and malondialdehyde (MDA) content by triggering the antioxidant systems. HBR acts as a shield in soybean, protecting the plant against the harmful effects of methylglyoxal (MG) effects by upregulating the enzymes glyoxalase I, (Gly I;15%) and glyoxalase II (Gly II;29.1%) compared to the levels in drought stressed seedlings. Overall, HBR improved drought tolerance in soybean seedlings by modulating osmolytes, the AsA-GSH cycle, and enzyme activities.

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“…Although the difference in available P was not significant between the two treatments, this result further supports that the release of available P in BPR-enriched composts is sustained better by the addition of rhizosphere soil during composting. The rhizosphere which is the narrow zone in the soil near roots (Kumar and Dubey, 2020) provides various ecosystem services, including the cycling of nutrients (Adle, 2016), and it is an enormous reservoir of microbial community and small soil-inhabiting animals (Malla et al, 2018;Dubey et al, 2019). However, the functionality of this rhizosphere microbiome depends on several factors such as the intrinsic natural abundance of microbes in the environment which also relates to the soil physicochemical properties, the type of plant since the nature of the released secondary molecules triggering microbial activities FIGURE 3 | Distribution of phoD, phnX, and aphA genes involved in P mineralization.…”

Section: Evolution Of Compost's Physicochemical Parametersmentioning

confidence: 99%

Phosphate-Solubilizing Fungi and Alkaline Phosphatase Trigger the P Solubilization During the Co-composting of Sorghum Straw Residues With Burkina Faso Phosphate Rock

Sarr

Tibiri

Fukuda

et al. 2020

Front. Environ. Sci.

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Phosphate rocks (PR), the primary source of phosphorus (P), are often co-composted with organic materials to enhance P availability. However, the mechanisms of P solubilization in PR-enriched composts are not well elucidated. This study investigated such mechanisms by monitoring the changes in P fractions during composting and by determining the relationships between the physicochemical and biological parameters. Sorghum straw residues were composted alone (Comp), or with 10% PR (P-Comp), or with 10% PR and 10% rhizosphere soil (P-Comp-Soil), and samples were collected at 45, 60, and 180 days for analysis. The labile-P composed of H 2 O-and NaHCO 3extractable inorganic P (Pi) and organic P (Po), the moderately labile-P extracted by NaOH (Pi + Po), and the unavailable P formed of the HCl-P and residual-P, increased with the progress of the composting. At 180 days, P-Comp-Soil contained the highest amount of labile-P. There were strong and positive correlations between labile-P and the abundance of total fungi, phosphate-solubilizing fungi (PSF), alkaline phosphatase phoD, phosphonatase phnX, acid phosphatase aphA. Although total fungi were much fewer than total bacteria, the PSF mainly triggered the mineral P solubilization. The alkaline phosphatase phoD was the main enzyme leading the organic P mineralization, while the contribution of phosphonatase phnX, acid phosphatase aphA, and siderophore entA to the organic P solubilization was minor. Besides, the bacterial specific-transporter (pstS) gene increased with the increase of labile-P, allowing for immobilization of little fractions of P in microbial cells. This study highlighted the significant role of PSF and alkaline phosphatase in the P solubilization of PR-enriched composts. Furthermore, it showed the benefit of supplementing the PRenriched composts with rhizosphere soil, a niche of ecologically important source of beneficial microbes.

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Growing more with less: Breeding and developing drought resilient soybean to improve food security

Cited by 84 publications

References 111 publications

PGPR‐mediated induction of systemic resistance and physiochemical alterations in plants against the pathogens: Current perspectives

PGPR‐mediated induction of systemic resistance and physiochemical alterations in plants against the pathogens: Current perspectives

Insights into 28-homobrassinolide (HBR)-mediated redox homeostasis, AsA–GSH cycle, and methylglyoxal detoxification in soybean under drought-induced oxidative stress

Phosphate-Solubilizing Fungi and Alkaline Phosphatase Trigger the P Solubilization During the Co-composting of Sorghum Straw Residues With Burkina Faso Phosphate Rock

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