Ozone Induced Stomatal Regulations, MAPK and Phytohormone Signaling in Plants

Hasan, Md. Mahadi; Rahman, Atikur; Skalický, Milan; Alabdallah, Nadiyah M.; Waseem, Muhammad; Jahan, Mohammad Shah; Ahammed, Golam Jalal; El-Mogy, Mohamed M.; El-Yazied, Ahmed Abou; Ibrahim, Mohamed; Fang, Xiang‐Wen

doi:10.3390/ijms22126304

Cited by 61 publications

(54 citation statements)

References 73 publications

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“…This effect implies that under high levels of salinity, ALA as a potent antioxidant has a key protective role on Chl a (considered the major cofactor in the photochemical reactions inside chloroplast) [50]. It is well known that ABA (the major stress hormone in higher order plants under osmotic stress) is synthesized from a carotenoid intermediate [51,52]. In this study, under saline conditions, carotenoids were increased by ALA treatment.…”

Section: Discussionmentioning

confidence: 74%

Exogenous Application of Alpha-Lipoic Acid Mitigates Salt-Induced Oxidative Damage in Sorghum Plants through Regulation Growth, Leaf Pigments, Ionic Homeostasis, Antioxidant Enzymes, and Expression of Salt Stress Responsive Genes

Youssef

Raafat

El-Yazied

et al. 2021

Plants

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In plants, α-Lipoic acid (ALA) is considered a dithiol short-chain fatty acid with several strong antioxidative properties. To date, no data are conclusive regarding its effects as an exogenous application on salt stressed sorghum plants. In this study, we investigated the effect of 20 µM ALA as a foliar application on salt-stressed sorghum plants (0, 75 and 150 mM as NaCl). Under saline conditions, the applied-ALA significantly (p ≤ 0.05) stimulated plant growth, indicated by improving both fresh and dry shoot weights. A similar trend was observed in the photosynthetic pigments, including Chl a, Chl b and carotenoids. This improvement was associated with an obvious increase in the membrane stability index (MSI). At the same time, an obvious decrease in the salt induced oxidative damages was seen when the concentration of H2O2 and malondialdehyde (MDA) was reduced in the salt stressed leaf tissues. Generally, ALA-treated plants demonstrated higher antioxidant enzyme activity than in the ALA-untreated plants. A moderate level of salinity (75 mM) induced the highest activities of superoxide dismutase (SOD), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX). Meanwhile, the highest activity of catalase (CAT) was seen with 150 mM NaCl. Interestingly, applied-ALA led to a substantial decrease in the concentration of both Na and the Na/K ratio. In contrast, K and Ca exhibited a considerable increase in this respect. The role of ALA in the regulation of K+/Na+ selectivity under saline condition was confirmed through a molecular study (RT-PCR). It was found that ALA treatment downregulated the relative gene expression of plasma membrane (SOS1) and vacuolar (NHX1) Na+/H+ antiporters. In contrast, the high-affinity potassium transporter protein (HKT1) was upregulated.

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Section: Discussionmentioning

confidence: 74%

Exogenous Application of Alpha-Lipoic Acid Mitigates Salt-Induced Oxidative Damage in Sorghum Plants through Regulation Growth, Leaf Pigments, Ionic Homeostasis, Antioxidant Enzymes, and Expression of Salt Stress Responsive Genes

Youssef

Raafat

El-Yazied

et al. 2021

Plants

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“…Salt-sensitive and salt-tolerant plant species use generally the same basic mechanisms of adaptation to salinity; therefore, it has been postulated that the differences in salt tolerance are most probably based on specific regulatory mechanisms [ 40 ]. As ROS signalling is a crucial component modulating stress responses in plants [ 3 , 7 , 41 ], it is reasonable to speculate that differences in the regulation of its components, such as NOXs, might influence stress tolerance. To verify this hypothesis, we compared the expression profiles of two NOX genes important in ROS signalling under salt-stress, RBOHD and RBOHF , in the halophyte E. salsugineum and the glycophyte A. thaliana .…”

Section: Discussionmentioning

confidence: 99%

Differential Regulation of NAPDH Oxidases in Salt-Tolerant Eutrema salsugineum and Salt-Sensitive Arabidopsis thaliana

Pilarska

Bartels

Niewiadomska

2021

IJMS

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Reactive oxygen species (ROS) signalling is crucial in modulating stress responses in plants, and NADPH oxidases (NOXs) are an important component of signal transduction under salt stress. The goal of this research was to investigate whether the regulation of NOX-dependent signalling during mild and severe salinity differs between the halophyte Eutrema salsugineum and the glycophyte Arabidopsis thaliana. Gene expression analyses showed that salt-induced expression patterns of two NOX genes, RBOHD and RBOHF, varied between the halophyte and the glycophyte. Five days of salinity stimulated the expression of both genes in E. salsugineum leaves, while their expression in A. thaliana decreased. This was not accompanied by changes in the total NOX activity in E. salsugineum, while the activity in A. thaliana was reduced. The expression of the RBOHD and RBOHF genes in E. salsugineum leaves was induced by abscisic acid (ABA) and ethephon spraying. The in silico analyses of promoter sequences of RBOHD and RBOHF revealed multiple cis-acting elements related to hormone responses, and their distribution varied between E. salsugineum and A. thaliana. Our results indicate that, in the halophyte E. salsugineum, the maintenance of the basal activity of NOXs in leaves plays a role during acclimation responses to salt stress. The different expression patterns of the RBOHD and RBOHF genes under salinity in E. salsugineum and A. thaliana point to a modified regulation of these genes in the halophyte, possibly through ABA- and/or ethylene-dependent pathways.

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“…The un-weeded control offered the least plant growth parameters, tuber quantity, and quality compared to the remaining other treatments. However, the potato yield was significantly increased by all the herbicides and the hoeing treatments [61][62][63][64][65][66][67]. This could be due to the effective weed control in herbicides treated plots and decreased weed infestation, providing a healthy environment for potato growth.…”

Section: Tuber Yield and Qualitymentioning

confidence: 99%

Effect of New Pre-Emergence Herbicides on Quality and Yield of Potato and Its Associated Weeds

et al. 2021

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Potato is an economically important vegetable crop in Egypt. Weed infestation, especially broad-leafed, during the vegetative growth stage substantially affects both crop yield and tuber quality. In the current study, the impact of new ready-mix pre-emergent herbicides on broadleaf weeds, tuber yield, and quality was evaluated. The two-year field experiment comprised the following treatments: (1) Un-weeded control, (2) Hand hoeing, (3) Sencor, (4) Ecopart, (5) Zeus, (6) Kroki, and (7) Flomex. The results showed that weed control treatments significantly reduced the weed density compared to un-weeded control and the herbicides efficacy reached over 90%. The herbicidal treatments also significantly increased the activity of antioxidant enzymes peroxidases (POX) and catalase (CAT) and improved the non-enzymatic antioxidant (carotenoids) compared to un-weeded control. Conversely, the higher content of malondialdehyde (MDA) in potato leaves was obtained for un-weeded control. Moreover, weed control treatments caused significant enhancement in plant growth parameters, yield, and its components in addition to tuber quality of potato. Compared to the un-weeded control, maximum tuber yield was observed in Flomex followed by Ecopart, Kroki, Zeus, and Sencor, respectively. The higher number of tubers and total yield were recorded in plants treated with Flomex plus compared to all the other treatments. Higher content of total soluble sugar, total soluble protein, and total starch content was observed in weed control treatments compared with un-weeded control. Based on Pearson’s correlation and heatmap analysis, the changes in agro-physiological parameters data are linked to the herbicidal treatments. The results indicate that the applied herbicides could be alternative products for Sencor and an option for controlling broadleaved weeds. However, further studies are needed to ensure their efficacy and safety under other conditions.

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Ozone Induced Stomatal Regulations, MAPK and Phytohormone Signaling in Plants

Cited by 61 publications

References 73 publications

Exogenous Application of Alpha-Lipoic Acid Mitigates Salt-Induced Oxidative Damage in Sorghum Plants through Regulation Growth, Leaf Pigments, Ionic Homeostasis, Antioxidant Enzymes, and Expression of Salt Stress Responsive Genes

Exogenous Application of Alpha-Lipoic Acid Mitigates Salt-Induced Oxidative Damage in Sorghum Plants through Regulation Growth, Leaf Pigments, Ionic Homeostasis, Antioxidant Enzymes, and Expression of Salt Stress Responsive Genes

Differential Regulation of NAPDH Oxidases in Salt-Tolerant Eutrema salsugineum and Salt-Sensitive Arabidopsis thaliana

Effect of New Pre-Emergence Herbicides on Quality and Yield of Potato and Its Associated Weeds

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