Seed priming of plants aiding in drought stress tolerance and faster recovery: a review

Aswathi, K. P. Raj; Kalaji, Hazem M.; Puthur, Jos T.

doi:10.1007/s10725-021-00755-z

Cited by 33 publications

(19 citation statements)

References 115 publications

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“…This could be because of the development of defense mechanisms in the SH-8-treated seeds, including increased antioxidant production and changes in osmotic processes. This mechanism originates from the primary memory, which can be established after secondary exposure, and is known as prime-omics ( Khomari et al., 2018 ; Srivastava et al., 2021 ) ( Aswathi et al., 2021 ). The germination percentage decreased linearly with an increase in the concentration of PEG.…”

Section: Resultsmentioning

confidence: 99%

Seed Bio-priming of wheat with a novel bacterial strain to modulate drought stress in Daegu, South Korea

et al. 2023

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Wheat is one of the major cereal crop grown food worldwide and, therefore, plays has a key role in alleviating the global hunger crisis. The effects of drought stress can reduces crop yields by up to 50% globally. The use of drought-tolerant bacteria for biopriming can improve crop yields by countering the negative effects of drought stress on crop plants. Seed biopriming can reinforce the cellular defense responses to stresses via the stress memory mechanism, that its activates the antioxidant system and induces phytohormone production. In the present study, bacterial strains were isolated from rhizospheric soil taken from around the Artemisia plant at Pohang Beach, located near Daegu, in the South Korea Republic of Korea. Seventy-three isolates were screened for their growth-promoting attributes and biochemical characteristics. Among them, the bacterial strain SH-8 was selected preferred based on its plant growth-promoting bacterial traits, which are as follows: abscisic acid (ABA) concentration = 1.08 ± 0.05 ng/mL, phosphate-solubilizing index = 4.14 ± 0.30, and sucrose production = 0.61 ± 0.13 mg/mL. The novel strain SH-8 demonstrated high tolerance oxidative stress. The antioxidant analysis also showed that SH-8 contained significantly higher levels of catalase (CAT), superoxide dismutase (SOD), and ascorbic peroxidase (APX). The present study also quantified and determined the effects of biopriming wheat (Triticum aestivum) seeds with the novel strain SH-8. SH-8 was highly effective in enhancing the drought tolerance of bioprimed seeds; their drought tolerance and germination potential (GP) were increased by up to 20% and 60%, respectively, compared with those in the control group. The lowest level of impact caused by drought stress and the highest germination potential, seed vigor index (SVI), and germination energy (GE) (90%, 2160, and 80%, respectively), were recorded for seeds bioprimed with with SH-8. These results show that SH-8 enhances drought stress tolerance by up to 20%. Our study suggests that the novel rhizospheric bacterium SH-8 (gene accession number OM535901) is a valuable biostimulant that improves drought stress tolerance in wheat plants and has the potential to be used as a biofertilizer under drought conditions.

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Section: Resultsmentioning

confidence: 99%

Seed Bio-priming of wheat with a novel bacterial strain to modulate drought stress in Daegu, South Korea

et al. 2023

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“…Priming, due to an inherently relatively high stability of photosystems and their high recovery response, offers a role in reducing the severity of stress and can therefore promote a rapid and complete recovery of plant physiological functions. Although different priming methods undoubtedly improve photosynthetic parameters and overall photosynthetic efficiency of plants exposed to various environmental stresses ( Vincent et al., 2020 ; Sorrentino et al., 2021 ; Aswathi et al., 2022 ; Johnson and Puthur, 2022 ), the control mechanisms that govern the photosynthetic protection are still poorly understood. Recently, a major role in both the direct and indirect regulation of the photosynthetic protection under stress conditions has been attributed to various plant hormones ( Müller and Munné-Bosch, 2021 ), which have long been known as effective priming agents ( Kauss and Jeblick, 1995 ; Mur et al., 1996 ; Ton and Mauch-Mani, 2004 ; Hirao et al., 2012 ; Wang et al., 2014 ; Ji et al., 2021 ).…”

Section: Mechanisms Of Cytokinin-mediated Effects On Photosynthesismentioning

confidence: 99%

Plant hormone cytokinin at the crossroads of stress priming and control of photosynthesis

Hudeček

Nožková²,

Plíhalová³

et al. 2023

Front. Plant Sci.

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To cope with biotic and abiotic stress conditions, land plants have evolved several levels of protection, including delicate defense mechanisms to respond to changes in the environment. The benefits of inducible defense responses can be further augmented by defense priming, which allows plants to respond to a mild stimulus faster and more robustly than plants in the naïve (non-primed) state. Priming provides a low-cost protection of agriculturally important plants in a relatively safe and effective manner. Many different organic and inorganic compounds have been successfully tested to induce resistance in plants. Among the plethora of commonly used physicochemical techniques, priming by plant growth regulators (phytohormones and their derivatives) appears to be a viable approach with a wide range of applications. While several classes of plant hormones have been exploited in agriculture with promising results, much less attention has been paid to cytokinin, a major plant hormone involved in many biological processes including the regulation of photosynthesis. Cytokinins have been long known to be involved in the regulation of chlorophyll metabolism, among other functions, and are responsible for delaying the onset of senescence. A comprehensive overview of the possible mechanisms of the cytokinin-primed defense or stress-related responses, especially those related to photosynthesis, should provide better insight into some of the less understood aspects of this important group of plant growth regulators.

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“…70,71 DNA repair is a crucial event in seeds undergoing a sudden change from dormant to active phase, which induces DNA breakdown, ROS accumulation and obstructed cell division, and maintains seed viability, vigor and germination. 58,72,73 A transcriptome study revealed the differential expression of genes belonging to different functional categories, such as the defence response, metabolism of DNA/RNA, proteins, energy, cell wall, stress, and secondary metabolism in rice (Oryza sativa L.) plants primed with P. fluorescens and infected with Cnaphalocrocis medinalis. 74 Priming regulates the protein subunits (⊍ and ⊎ tubulin) for the maintenance of cell division, cellular cytoskeleton, cell growth and development.…”

Section: Induction Of Molecular Changes In Plantsmentioning

confidence: 99%

Seed biopriming as a promising approach for stress tolerance and enhancement of crop productivity: a review

Srivastava,

Tyagi,

Sharma

2023

J Sci Food Agric

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Chemicals are extensively used in agriculture to increase crop production to meet the nutritional needs of an expanding world population. However, their injudicious application adversely affects soil's physical, chemical, and biological properties, subsequently posing a substantial threat to human health and global food security. Beneficial microorganisms improve plant health and productivity with minimal impact on the environment; however, their efficacy greatly relies on the application technique. Biopriming is an advantageous technique that involves the treatment of seeds with beneficial biological agents. It exhibits immense potential in improving the physiological functioning of seeds, thereby playing a pivotal role in their uniform germination and vigor. Biopriming mediated molecular and metabolic reprogramming imparts stress tolerance to plants, improves plant health, and enhances crop productivity. Besides, it is also associated with rehabilitating degraded land, improving soil fertility, health, and nutrient cycling. Although biopriming has vast applications in the agricultural system, its commercialization and utilization by farmers is still in their infancy. This review aims to critically analyze the recent studies based on biopriming‐mediated stress mitigation by alteration in physiological, metabolic, and molecular processes in plants. Additionally, considering the necessity of popularizing this technique, major challenges and prospects linked to the commercialization and utilization of this technique in agricultural systems have also been discussed.This article is protected by copyright. All rights reserved.

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Seed priming of plants aiding in drought stress tolerance and faster recovery: a review

Cited by 33 publications

References 115 publications

Seed Bio-priming of wheat with a novel bacterial strain to modulate drought stress in Daegu, South Korea

Seed Bio-priming of wheat with a novel bacterial strain to modulate drought stress in Daegu, South Korea

Plant hormone cytokinin at the crossroads of stress priming and control of photosynthesis

Seed biopriming as a promising approach for stress tolerance and enhancement of crop productivity: a review

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