ROS-Induced Signaling and Gene Expression in Crops Under Salinity Stress

Kumar, Vinay; Khare, Tushar; Sharma, Mansi; Wani, Shabir Hussain

doi:10.1007/978-981-10-5254-5_7

Cited by 28 publications

(36 citation statements)

References 146 publications

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“…For instance, GDH that participates in ammonia production/accumulation in stressed cells instead starts synthesizing glutamate and sequentially leading to the production of proline (well known to partake in stress tolerance) in tobacco [7,221]. ROS signaling arbitrates transcription of the gene encoding for GDH α-subunit [7]. ROS such as O 2…”

Section: Ros As Signaling Moleculesmentioning

confidence: 99%

“…The contributory environmental factors are extreme temperature events (low or high), excess irradiation (UV-A and UV-B), fluctuation in light intensities (low or high), strong storm events, non-uniformity in the rainfall pattern (deficit or excess), discharge and accumulation of heavy metals, and other xenobiotic compounds (pesticides, fertilizers, hydrocarbons) [ 4 , 5 , 6 ]. In a natural environment, the abiotic stresses often occur in combination [ 7 ] due to their interrelated pathways and show unparalleled and compounded effects on plants, impinging their cellular, metabolic, and physiological activities [ 1 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…Reduced seed germination, immature leaf senescence, and abridged growth and productivity. [7,35,36] Antioxidants 2021, 10, 277 6 of 37…”

mentioning

confidence: 99%

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Abiotic Stress and Reactive Oxygen Species: Generation, Signaling, and Defense Mechanisms

et al. 2021

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Climate change is an invisible, silent killer with calamitous effects on living organisms. As the sessile organism, plants experience a diverse array of abiotic stresses during ontogenesis. The relentless climatic changes amplify the intensity and duration of stresses, making plants dwindle to survive. Plants convert 1–2% of consumed oxygen into reactive oxygen species (ROS), in particular, singlet oxygen (1O2), superoxide radical (O2•–), hydrogen peroxide (H2O2), hydroxyl radical (•OH), etc. as a byproduct of aerobic metabolism in different cell organelles such as chloroplast, mitochondria, etc. The regulatory network comprising enzymatic and non-enzymatic antioxidant systems tends to keep the magnitude of ROS within plant cells to a non-damaging level. However, under stress conditions, the production rate of ROS increases exponentially, exceeding the potential of antioxidant scavengers instigating oxidative burst, which affects biomolecules and disturbs cellular redox homeostasis. ROS are similar to a double-edged sword; and, when present below the threshold level, mediate redox signaling pathways that actuate plant growth, development, and acclimatization against stresses. The production of ROS in plant cells displays both detrimental and beneficial effects. However, exact pathways of ROS mediated stress alleviation are yet to be fully elucidated. Therefore, the review deposits information about the status of known sites of production, signaling mechanisms/pathways, effects, and management of ROS within plant cells under stress. In addition, the role played by advancement in modern techniques such as molecular priming, systems biology, phenomics, and crop modeling in preventing oxidative stress, as well as diverting ROS into signaling pathways has been canvassed.

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Section: Ros As Signaling Moleculesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Abiotic Stress and Reactive Oxygen Species: Generation, Signaling, and Defense Mechanisms

et al. 2021

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“…Extreme soil salinity is one of the most destructive abiotic stresses for global agriculture as it can lead to the degradation of arable soils, particularly those that are heavily irrigated (Akram et al 2017; Kumar et al 2017a). Over 800 million ha of land are estimated to be affected by salinity worldwide and 32 million ha of dryland agriculture is thought to be salt-affected (FAO 2015).…”

Section: Introductionmentioning

confidence: 99%

Engineering salinity tolerance in plants: progress and prospects

Wani

Kumar

Khare

et al. 2020

Planta

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150

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Soil salinity exerts significant constraints on global crop production, posing a serious challenge for plant breeders and biotechnologists. The classical transgenic approach for enhancing salinity tolerance in plants revolves by boosting endogenous defence mechanisms, often via a single gene 2 approach, and usually involves the enhanced synthesis of compatible osmolytes, antioxidants, polyamines, maintenance of hormone homeostasis, modification of transporters and/or regulatory proteins, including transcription factors (TFs) and alternative splicing events. Occasionally, genetic manipulation of regulatory proteins or phytohormone levels confers salinity-tolerance, but all these may cause undesired reduction in plant growth and/or yields. In this review, we present and evaluate novel and cutting-edge approaches for engineering salt tolerance in crop plants. First, we cover recent findings regarding the importance of regulatory proteins and transporters, and how they can be used to enhance salt tolerance in crop plants. We also evaluate the importance of halobiomes as a reservoir of genes that can be used for engineering salt-tolerance in glycophytic crops. Additionally, the role of microRNAs as critical post-transcriptional regulators in plant adaptive responses to salt stress are reviewed and their use for engineering salt-tolerant crop plants is critically assessed. The potentials of alternative splicing mechanisms and targeted gene-editing technologies in understanding plant salt-stress responses and developing salt-tolerant crop plants is also discussed.

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“…Exposure of plants to salinity often leads to decreased CO 2 assimilation, causing overreduction of photochemical machinery (both PSI and PSII), which in turn results in leakage of absorbed energy and excited electrons to molecular oxygen that generates reactive oxygen species (ROS; Hameed and Khan 2011;Ozgur et al 2013;Bose et al 2013). ROS are energetically excited or partially reduced forms of molecular oxygen (O 2 ), which when accumulated to high concentrations lead to oxidative destruction of important cell components such as membrane lipids, proteins, and nucleic acids, a phenomenon called "oxidative stress" (Hameed and Khan 2011;Ozgur et al 2013;Bose et al 2013;Kumar et al 2017;García-Caparrós et al 2019;Akyol et al 2020). Both osmotic and ionic components of the salinity can inflict ROS production in plants (Ozgur et al 2013).…”

mentioning

confidence: 99%

Photosynthetic Adaptations and Oxidative Stress Tolerance in Halophytes from Warm Subtropical Region

Gulzar¹,

Hussain²,

Gul³

et al. 2020

Handbook of Halophytes

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This chapter attempts to synthesize recent work related to photosynthetic adaptations and oxidative stress mitigation mechanisms of perennial warm subtropical halophytes of Karachi, Pakistan. In most species the light-harvesting photochemical reactions appear less sensitive to increase in salinity treatments in comparison with those of carbon fixation. This was evident from unaltered F v /F m values which indicate the maximum photochemical efficiency and the degree of photoinhibition of PSII. However, there was a reduction in electron transport rate (ETR) and a rise in non-photochemical quenching (NPQ) by heat dissipation. Decrease in net photosynthetic rates (P N), stomatal conductance (gs), and transpiration

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ROS-Induced Signaling and Gene Expression in Crops Under Salinity Stress

Cited by 28 publications

References 146 publications

Abiotic Stress and Reactive Oxygen Species: Generation, Signaling, and Defense Mechanisms

Abiotic Stress and Reactive Oxygen Species: Generation, Signaling, and Defense Mechanisms

Engineering salinity tolerance in plants: progress and prospects

Photosynthetic Adaptations and Oxidative Stress Tolerance in Halophytes from Warm Subtropical Region

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