Salt and drought stress affects electron transport chain genes in rice

Varshikar, Deepali; Tan, Fui Ching

doi:10.21833/ijaas.2017.02.018

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…ABA is probably the most important signal molecule that controls a lot of physiological processes including stress response to abiotic stress [ 79 , 80 ], where it regulates osmotic balance and induces resistance to stresses [ 79 , 80 , 81 ]. This is achieved through the activation of antioxidant genes (CAT, SOD, peroxidase (POX)) by ABA [ 82 ] through ROS-induction and increased levels of NADPH oxidase [ 83 ]. In rice, drought-hypersensitive mutants DSM1 and DSM2 have shown the ability to regulate POX expression and control ABA levels that lead to ROS quenching [ 84 , 85 ].…”

Section: Signaling and Control In Abiotic Stress-associated Ros Homentioning

confidence: 99%

ROS Homeostasis in Abiotic Stress Tolerance in Plants

Nadarajah

2020

IJMS

373

181

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Climate change-induced abiotic stress results in crop yield and production losses. These stresses result in changes at the physiological and molecular level that affect the development and growth of the plant. Reactive oxygen species (ROS) is formed at high levels due to abiotic stress within different organelles, leading to cellular damage. Plants have evolved mechanisms to control the production and scavenging of ROS through enzymatic and non-enzymatic antioxidative processes. However, ROS has a dual function in abiotic stresses where, at high levels, they are toxic to cells while the same molecule can function as a signal transducer that activates a local and systemic plant defense response against stress. The effects, perception, signaling, and activation of ROS and their antioxidative responses are elaborated in this review. This review aims to provide a purview of processes involved in ROS homeostasis in plants and to identify genes that are triggered in response to abiotic-induced oxidative stress. This review articulates the importance of these genes and pathways in understanding the mechanism of resistance in plants and the importance of this information in breeding and genetically developing crops for resistance against abiotic stress in plants.

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Section: Signaling and Control In Abiotic Stress-associated Ros Homentioning

confidence: 99%

ROS Homeostasis in Abiotic Stress Tolerance in Plants

Nadarajah

2020

IJMS

373

181

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“…The reduction in RWC is one of the earliest responses to drought and is usually followed by a reduced leaf water potential and stomatal closing [56]. Furthermore, stomatal closing is associated with increased leaf temperatures which cause denaturation of proteins and damage membrane stability, photosynthesis, mineral nutrition, ion uptake and the synthesis of amino acids [83,84].…”

Section: Relative Water Content (Rwc)mentioning

confidence: 99%

The Role of Plant Growth-Promoting Bacteria in Alleviating the Adverse Effects of Drought on Plants

Abdelaal

AlKahtani

Attia

et al. 2021

Biology

160

100

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Plant growth-promoting bacteria play an essential role in enhancing the physical, chemical and biological characters of soils by facilitating nutrient uptake and water flow, especially under abiotic stress conditions, which are major constrains to agricultural development and production. Drought is one of the most harmful abiotic stress and perhaps the most severe problem facing agricultural sustainability, leading to a severe shortage in crop productivity. Drought affects plant growth by causing hormonal and membrane stability perturbations, nutrient imbalance and physiological disorders. Furthermore, drought causes a remarkable decrease in leaf numbers, relative water content, sugar yield, root yield, chlorophyll a and b and ascorbic acid concentrations. However, the concentrations of total phenolic compounds, electrolyte leakage, lipid peroxidation, amounts of proline, and reactive oxygen species are considerably increased because of drought stress. This negative impact of drought can be eliminated by using plant growth-promoting bacteria (PGPB). Under drought conditions, application of PGPB can improve plant growth by adjusting hormonal balance, maintaining nutrient status and producing plant growth regulators. This role of PGPB positively affects physiological and biochemical characteristics, resulting in increased leaf numbers, sugar yield, relative water content, amounts of photosynthetic pigments and ascorbic acid. Conversely, lipid peroxidation, electrolyte leakage and amounts of proline, total phenolic compounds and reactive oxygen species are decreased under drought in the presence of PGPB. The current review gives an overview on the impact of drought on plants and the pivotal role of PGPB in mitigating the negative effects of drought by enhancing antioxidant defense systems and increasing plant growth and yield to improve sustainable agriculture.

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“…Jiang and Zhang (2002) reported that inhibition of ABA synthesis reduced the activity of plasma membrane-NADPH oxidase and generation of O2 -in leaves and reciprocal effects were obtained by exogenous application of ABA. It showed that NADPH oxidase is involved in ABA induced-ROS production, which ultimately results in induction of antioxidants defense system under drought and enhance drought tolerance in rice (Varshikar and Tan, 2016).…”

Section: Ros Production Under Drought Stressmentioning

confidence: 99%

Role of Reactive Oxygen Species and Contribution of New Players in Defense Mechanism under Drought Stress in Rice

Qureshi¹,

Munir²,

Rasul³

et al. 2018

IJAB

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Rice (Oryza sativa) falls among the staple food crops in different parts of the globe. In current scenario of climate change, drought stress leads to significant decrease in crop production. It has negative effect on rice growth and development by affecting cellular, physiological and molecular processes. Photo-respiration increases under drought stress leads to overproduction of reactive oxygen species (ROS) in different organelles of the cell like chloroplasts, mitochondria and peroxisomes etc., which induce severe oxidative stress in rice. Over production of ROS can cause damage to proteins, lipids and DNA leading to lipid peroxidation, proteins oxidation, mutation, DNA damage that can lead to cell death. Under drought stress, ROS turn over in various organelles overload antioxidant quenching mechanism leading to oxidative damage. Oxidative stress can be overcome by the scavenging system, which consists of enzymatic and non-enzymatic antioxidants. Moreover, ROS also acts as signaling molecule and triggers defense mechanism through specific signal transduction network under stress. Under stress condition, activation of molecular cascades is initiated through the perception of stress that leads to the activation of signal transduction pathway including expression of transcription factors and stress related genes. Understanding of this regulatory mechanism of plant development and growth in drought-ROS stress can be promising in the development of improved transgenic rice under this stress. This review will provide an overview of ROS synthesis and signaling pathway under drought condition in rice.

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Salt and drought stress affects electron transport chain genes in rice

Cited by 5 publications

References 20 publications

ROS Homeostasis in Abiotic Stress Tolerance in Plants

ROS Homeostasis in Abiotic Stress Tolerance in Plants

The Role of Plant Growth-Promoting Bacteria in Alleviating the Adverse Effects of Drought on Plants

Role of Reactive Oxygen Species and Contribution of New Players in Defense Mechanism under Drought Stress in Rice

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