Effect of High-Temperature Stress on Ascorbate–Glutathione Cycle in Maize

Tiwari, Yogesh Kumar; Yadav, Sushil Kumar

doi:10.1007/s40003-019-00421-x

Cited by 18 publications

(14 citation statements)

References 35 publications

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“…Our results indicated a significant increase in the level of GSH in seedlings exposed to heat stress (Figure 4C) with a significantly higher accumulation in heat tolerant BG26 than others. This finding is in agreement with Tiwari & Yadav (2019) and Kocsy, Szalai and Galiba (2002), a multi-fold increase in GSH content was recorded in tolerant maize and wheat varieties under heat stress exposure. They also suggested that an increase in GSH content under heat stress was due to higher rate of GSH synthesis which was further accelerated by the enhanced GR activity.…”

Section: Efficient Operation Of Ascorbate-glutathione Cycle Is Pivota...supporting

confidence: 93%

“…More than 2-fold increase in GST activity was recorded in the tolerant BG26 compared to the susceptible Pavon (Figure 6B), thereby decreasing the levels of MDA and H 2 O 2 in wheat seedlings exposed to heat stress (Figure 3A & C). Similar increases in GST activity under heat stress were observed in wheat (Hasanuzzaman, Hossain, & Fujita, 2011a;Hasanuzzaman, Nahar, Alam, & Fujita, 2012) and maize (Tiwari & Yadav, 2019).…”

Section: Stable Antioxidant Enzyme System Is Crucial For Heat Tolerancesupporting

confidence: 75%

“…Other than H 2 O 2 detoxification, these enzymes are also actively involved in the regeneration of non-enzymatic antioxidants like AsA and GSH. The presence of AsA and GSH has been reported to improve osmoregulation, plant water status and nutrient status, water use efficiency, photosynthetic performance, reduce oxidative stress and improve overall productivity in plants (Hasanuzzaman et al, 2019;Tiwari & Yadav, 2019). Our results demonstrate that AsA content markedly decreased under heat stress in all wheat varieties and it was less pronounced in heat tolerant BG26 (Figure 4D).…”

Section: Efficient Operation Of Ascorbate-glutathione Cycle Is Pivota...mentioning

confidence: 49%

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Heat-induced oxidative damage is ameliorated by enhanced antioxidants activity in the tolerant wheat variety

Mohiuddin

Siddiqui

Rahman

et al. 2022

Preprint

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Heat stress alters photosynthetic components and antioxidant scavenging system, negatively affecting plant growth and development. Plants overcome heat stress damage through an integrated network involving enzymatic and non-enzymatic antioxidants. The aim of the study was to assess physiological and biochemical responses in contrasting thermotolerant wheat varieties exposed to 25°C (control) and 35°C (heat stress), during seedling stage. Our results revealed a substantial decrease in the photosynthetic pigments, carotenoids, anthocyanin content, and increased membrane injury index, malondialdehyde, lipoxygenase, methylglyoxal and H2O2 contents compared to non-stress wheat seedlings. Comparatively the heat tolerant variety BG26 maintained a high level of stability compared to the heat susceptible variety Pavon, perpetuated by higher accumulation of proline, glycine betaine, ascorbate-glutathione cycle associated enzymes, reduced glutathione and ascorbate contents. In addition, significantly lower MG detoxification and activities of antioxidant system and ascorbate-glutathione cycle related enzymatic activities lead to increased susceptibility in Pavon. Hierarchical clustering and principal component analysis revealed BG26 possessing a combination of biochemical responses that induced higher level of tolerance. Taken together, our results provide a reference for utilizing BG26 and Pavon as highly contrasting heat-responsive varieties for comparative genomics and translational research to unravel underlying mechanisms to better adapt wheat to heat stress.

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Section: Efficient Operation Of Ascorbate-glutathione Cycle Is Pivota...supporting

confidence: 93%

Section: Stable Antioxidant Enzyme System Is Crucial For Heat Tolerancesupporting

confidence: 75%

Section: Efficient Operation Of Ascorbate-glutathione Cycle Is Pivota...mentioning

confidence: 49%

See 1 more Smart Citation

Heat-induced oxidative damage is ameliorated by enhanced antioxidants activity in the tolerant wheat variety

Mohiuddin

Siddiqui

Rahman

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The higher leaf temperature denatures various proteins and enzymes and reduces membrane permeability and, resultantly, various facets of plant metabolism are affected. These changes are the main reasons for the disturbance in photosynthesis, respiration, mineral nutrition and synthesis of proteins and amino acids [31,32].…”

Section: Effects Of Drought Stress On Plantsmentioning

confidence: 99%

The Critical Role of Zinc in Plants Facing the Drought Stress

et al. 2020

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Drought stress affects plant growth and development by altering physiological and biochemical processes resulting in reduced crop productivity. Zinc (Zn) is an essential micronutrient that plays fundamental roles in crop resistance against the drought stress by regulating various physiological and molecular mechanisms. Under drought stress, Zn application improves seed germination, plant water relations, cell membrane stability, osmolyte accumulation, stomatal regulation, water use efficiency and photosynthesis, thus resulting in significantly better plant performance. Moreover, Zn interacts with plant hormones, increases the expression of stress proteins and stimulates the antioxidant enzymes for counteracting drought effects. To better appraise the potential benefits arising from optimum Zn nutrition, in the present review we discuss the role of Zn in plants under drought stress. Our aim is to provide a complete, updated picture in order to orientate future research directions on this topic.

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“…Tocopherol, a key lipid-soluble redox buffer, acts as a scavenger of singlet oxygen species and other ROS and helps in mitigating heat stress in plants [ 257 ], as reported in rice seedlings [ 258 ] and wheat [ 259 ]. Ascorbate also has the potential to improve heat stress tolerance in maize [ 111 , 260 ]. The primary function of ascorbic acid is to prevent ROS activity and the photoinactivation of PSII and thus prevent the entire photosynthetic apparatus from damage [ 261 ].…”

Section: Mechanisms Associated With Stress Tolerancementioning

confidence: 99%

The Adaptation and Tolerance of Major Cereals and Legumes to Important Abiotic Stresses

Rane

Singh

Kumar

et al. 2021

IJMS

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Abiotic stresses, including drought, extreme temperatures, salinity, and waterlogging, are the major constraints in crop production. These abiotic stresses are likely to be amplified by climate change with varying temporal and spatial dimensions across the globe. The knowledge about the effects of abiotic stressors on major cereal and legume crops is essential for effective management in unfavorable agro-ecologies. These crops are critical components of cropping systems and the daily diets of millions across the globe. Major cereals like rice, wheat, and maize are highly vulnerable to abiotic stresses, while many grain legumes are grown in abiotic stress-prone areas. Despite extensive investigations, abiotic stress tolerance in crop plants is not fully understood. Current insights into the abiotic stress responses of plants have shown the potential to improve crop tolerance to abiotic stresses. Studies aimed at stress tolerance mechanisms have resulted in the elucidation of traits associated with tolerance in plants, in addition to the molecular control of stress-responsive genes. Some of these studies have paved the way for new opportunities to address the molecular basis of stress responses in plants and identify novel traits and associated genes for the genetic improvement of crop plants. The present review examines the responses of crops under abiotic stresses in terms of changes in morphology, physiology, and biochemistry, focusing on major cereals and legume crops. It also explores emerging opportunities to accelerate our efforts to identify desired traits and genes associated with stress tolerance.

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Effect of High-Temperature Stress on Ascorbate–Glutathione Cycle in Maize

Cited by 18 publications

References 35 publications

Heat-induced oxidative damage is ameliorated by enhanced antioxidants activity in the tolerant wheat variety

Heat-induced oxidative damage is ameliorated by enhanced antioxidants activity in the tolerant wheat variety

The Critical Role of Zinc in Plants Facing the Drought Stress

The Adaptation and Tolerance of Major Cereals and Legumes to Important Abiotic Stresses

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