Achieving abiotic stress tolerance in plants through antioxidative defense mechanisms

Mishra, Neelam; Jiang, Chenkai; Chen, Lin; Paul, Abhirup; Chatterjee, Archita; Shen, Guoxin

doi:10.3389/fpls.2023.1110622

Cited by 98 publications

(33 citation statements)

References 201 publications

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“…Moreover, pretreatment with 0.4 µM EBR alleviated the injurious action of abiotic stress on wheat metabolism [ 60 ]. Drought-induced oxidative stress causes serious damage to different cellular components [ 37 , 61 ], and EBR’s ability to activate antioxidant defense mechanisms can contribute significantly to EBR-induced protection against water stress in wheat plants. In the present research, we have analyzed the effects of EBR on ROS generation and the activities of antioxidant enzymes, as well as on respiratory metabolism in wheat seedlings under drought stress.…”

Section: Introductionmentioning

confidence: 99%

24-Epibrassinolide Reduces Drought-Induced Oxidative Stress by Modulating the Antioxidant System and Respiration in Wheat Seedlings

Avalbaev,

Fedyaev,

Lubyanova

et al. 2024

Plants

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Brassinosteroids (BRs) represent a group of plant signaling molecules with a steroidal skeleton that play an essential role in plant adaptation to different environmental stresses, including drought. In this work, the effect of pretreatment with 0.4 µM 24-epibrassinolide (EBR) on the oxidant/antioxidant system in 4-day-old wheat seedlings (Triticum aestivum L.) was studied under moderate drought stress simulated by 12% polyethylene glycol 6000 (PEG). It was revealed that EBR-pretreatment had a protective effect on wheat plants as evidenced by the maintenance of their growth rate, as well as the reduction in lipid peroxidation and electrolyte leakage from plant tissues under drought conditions. This effect was likely due to the ability of EBR to reduce the stress-induced accumulation of reactive oxygen species (ROS) and modulate the activity of antioxidant enzymes. Meanwhile, EBR pretreatment enhanced proline accumulation and increased the barrier properties of the cell walls in seedlings by accelerating the lignin deposition. Moreover, the ability of EBR to prevent a drought-caused increase in the intensity of the total dark respiration and the capacity of alternative respiration contributes significantly to the antistress action of this hormone.

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Section: Introductionmentioning

confidence: 99%

24-Epibrassinolide Reduces Drought-Induced Oxidative Stress by Modulating the Antioxidant System and Respiration in Wheat Seedlings

Avalbaev,

Fedyaev,

Lubyanova

et al. 2024

Plants

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“…SOD plays a crucial role in the rst line of defense against oxidative stress by converting superoxide anions into H 2 O 2 . Hydrogen peroxide is then e ciently converted into water and molecular oxygen by CAT, acting as a potent ROS scavenger 57 . SOD exhibited a strong positive correlation with total antioxidant activity, underscoring its signi cant role in the plant's antioxidant system 58 .…”

Section: Discussionmentioning

confidence: 99%

“…A positive correlation was observed between total phenolic compounds and enzymatic antioxidants-SOD, CAT, and total antioxidant activity. This suggests that polyphenols play a role in the plant's mechanism against ROS, similar to SOD and CAT, indicating that higher polyphenolic compounds may lead to increased total antioxidant activity 57,60 . Ca exhibited positive correlations with SOD, CAT, and total antioxidant activity, while showing a negative correlation with PPO.…”

Section: Discussionmentioning

confidence: 99%

Improving postharvest quality and vase life of cut rose flowers by pre-harvest foliar co-applications of γ-Aminobutyric Acid and calcium chloride through antioxidant contents

Ehsanimehr,

Hosseinifarahi,

Abdipour

et al. 2024

Preprint

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Rose flowers (Rosa hybrida L.) are highly perishable and have a limited postharvest life. This study evaluated the effects of preharvest foliar applications of γ-aminobutyric acid (GABA) and calcium chloride (CaCl2), individually and in combination, on antioxidant responses and vase life of cut Jumilia rose flowers. Treatments included foliar sprays of GABA at 0, 20, 40, and 60 mM and CaCl2 at 0, 0.75%, and 1.5%, applied in a factorial design within a completely randomized setup before harvest. Results showed GABA and CaCl2 interaction (especially, 60 mM GABA and 1.5% CaCl2) significantly increased enzymatic antioxidants including superoxide dismutase, catalase, and peroxidase, as well as non-enzymatic antioxidants such as flavonoids, carotenoids, phenolics, and antioxidant activity in petals compared to control. SOD activity in roses, treated with CaCl2 (1.5%) and GABA (60 mM), peaked at 7.86 units. mg-1 protein min-1, showing a nearly 2.93-fold increase over the control (2.68 units. mg-1 protein min-1). A parallel trend was observed for CAT activity. These treatments also reduced petal malondialdehyde content and polyphenol oxidase activity. Protein content and vase life increased in all treatments. Plants treated with a combination of GABA (20 mM) and CaCl2 (0.75%), GABA (60 mM) and CaCl2 (1.5%), or GABA (40 mM) individually exhibited the longest vase life duration. These findings suggest the preharvest application of GABA and CaCl2 can enhance antioxidant capacity and vase life of cut roses and also delay senescence.

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“…Applying mineral nutrients or bio-regulators, which control multiple physiological and biochemical mechanisms at the metabolic and whole plant levels, improves plants’ natural defense against abiotic stress [ 18 ]. Thiourea is a sulfur-rich plant growth promoter that modulates plant development and effectively prevents the plants from oxidative damage imposed by abiotic stress [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Exogenous application of sulfur-rich thiourea (STU) to alleviate the adverse effects of cobalt stress in wheat

Zahid,

ul din,

Ahmad

et al. 2024

BMC Plant Biol

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Heavy metal stress affects crop growth and yields as wheat (Triticum aestivum L.) growth and development are negatively affected under heavy metal stress. The study examined the effect of cobalt chloride (CoCl2) stress on wheat growth and development. To alleviate this problem, a pot experiment was done to analyze the role of sulfur-rich thiourea (STU) in accelerating the defense system of wheat plants against cobalt toxicity. The experimental treatments were, i) Heavy metal stress (a) control and (b) Cobalt stress (300 µM), ii) STU foliar applications; (a) control and (b) 500 µM single dose was applied after seven days of stress, and iii) Wheat varieties (a) FSD-2008 and (b) Zincol-2016. The results revealed that cobalt stress decreased chlorophyll a by 10%, chlorophyll b by 16%, and carotenoids by 5% while foliar application of STU increased these photosynthetic pigments by 16%, 15%, and 15% respectively under stress conditions as in contrast to control. In addition, cobalt stress enhances hydrogen peroxide production by 11% and malondialdehyde (MDA) by 10%. In comparison, STU applications at 500 µM reduced the production of these reactive oxygen species by 5% and by 20% by up-regulating the activities of antioxidants. Results have revealed that the activities of SOD improved by 29%, POD by 25%, and CAT by 28% under Cobalt stress. Furthermore, the foliar application of STU significantly increased the accumulation of osmoprotectants as TSS was increased by 23% and proline was increased by 24% under cobalt stress. Among wheat varieties, FSD-2008 showed better adaptation under Cobalt stress by showing enhanced photosynthetic pigments and antioxidant activities compared to Zincol-2016. In conclusion, the foliar-applied STU can alleviate the negative impacts of Cobalt stress by improving plant physiological attributes and upregulating the antioxidant defense system in wheat. Graphical Abstract

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Achieving abiotic stress tolerance in plants through antioxidative defense mechanisms

Cited by 98 publications

References 201 publications

24-Epibrassinolide Reduces Drought-Induced Oxidative Stress by Modulating the Antioxidant System and Respiration in Wheat Seedlings

24-Epibrassinolide Reduces Drought-Induced Oxidative Stress by Modulating the Antioxidant System and Respiration in Wheat Seedlings

Improving postharvest quality and vase life of cut rose flowers by pre-harvest foliar co-applications of γ-Aminobutyric Acid and calcium chloride through antioxidant contents

Exogenous application of sulfur-rich thiourea (STU) to alleviate the adverse effects of cobalt stress in wheat

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