Hydrogen peroxide as a signalling molecule in plants and its crosstalk with other plant growth regulators under heavy metal stress

Nazir, Faroza; Fariduddin, Qazi; Khan, Tanveer Alam

doi:10.1016/j.chemosphere.2020.126486

Cited by 130 publications

(56 citation statements)

References 212 publications

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“…It has been well established that JA and H 2 O 2 function synergistically to regulate multiple physiological processes, such as leaf senescence, drought tolerance, stomatal closure, and wound-induced responses, and JA functions upstream of H 2 O 2 50,51 . Consistent with the data of these studies, our data show that MeJA mediates the melatonin-induced cold tolerance of Cl/Cm and Cl/Cf plants by inducing H 2 O 2 accumulation.…”

Section: Meja Mediates Melatonin-and Rootstock-induced H 2 O 2 Accumumentioning

confidence: 99%

Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

Guo

Lan

et al. 2021

Hortic Res

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Root–shoot communication has a critical role in plant adaptation to environmental stress. Grafting is widely applied to enhance the abiotic stress tolerance of many horticultural crop species; however, the signal transduction mechanism involved in this tolerance remains unknown. Here, we show that pumpkin- or figleaf gourd rootstock-enhanced cold tolerance of watermelon shoots is accompanied by increases in the accumulation of melatonin, methyl jasmonate (MeJA), and hydrogen peroxide (H2O2). Increased melatonin levels in leaves were associated with both increased melatonin in rootstocks and MeJA-induced melatonin biosynthesis in leaves of plants under cold stress. Exogenous melatonin increased the accumulation of MeJA and H2O2 and enhanced cold tolerance, while inhibition of melatonin accumulation attenuated rootstock-induced MeJA and H2O2 accumulation and cold tolerance. MeJA application induced H2O2 accumulation and cold tolerance, but inhibition of JA biosynthesis abolished rootstock- or melatonin-induced H2O2 accumulation and cold tolerance. Additionally, inhibition of H2O2 production attenuated MeJA-induced tolerance to cold stress. Taken together, our results suggest that melatonin is involved in grafting-induced cold tolerance by inducing the accumulation of MeJA and H2O2. MeJA subsequently increases melatonin accumulation, forming a self-amplifying feedback loop that leads to increased H2O2 accumulation and cold tolerance. This study reveals a novel regulatory mechanism of rootstock-induced cold tolerance.

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Section: Meja Mediates Melatonin-and Rootstock-induced H 2 O 2 Accumumentioning

confidence: 99%

Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

Guo

Lan

et al. 2021

Hortic Res

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“…In mitochondria, the activity of enzymes related to respiration is inhibited or the coupling of plant mitochondrial electron transport chain (ETC) and ATP is disrupted, resulting in the leakage of some electrons in the electron transfer of the respiratory chain, thereby generating ROS (Steffens, 2014). Compared with drought stress, accumulation of Cd in plants mainly cause morphological and physiological disorders and impact growth, photosynthesis, metabolic pathway, and enzymatic activity (Nazir et al, 2020). Cadmium ions were unable to directly generate ROS through Fenton and/or Haber Weiss reactions in biological systems under physiological conditions.…”

Section: Stressmentioning

confidence: 99%

Comparative response of SOD in different plants against cadmium and drought stress at the molecular level

Yang

Feng

2020

Appl Env Biotechnol

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Abiotic stress like drought and heavy metal imposes a negative impact on exposed plants’ growth and development, commences over production of reactive oxygen species (ROS) inside plant cells resulting in oxidative stress at the cellular level. After that, plants activate multiple defense mechanisms, within which the superoxide dismutase (SOD) family acts as the first line of defense to eliminate ROS. From the literature, it is evident that fewer studies have been carried out in combination with molecular evolution and phylogenetics, and expression profile of the SOD genes amidst dicot and the monocot at subcellular level against drought stress and cadmium (Cd) metal exposure. In the present study, SOD isogenes are identified in purposely elected two dicot plants i.e. Arabidopsis thaliana (9 genes), Solanum lycopersicum (8 genes) and two monocot plants namely Triticum aestivum (11 genes), and Oryza sativa (7 genes), respectively. Based on the amino acids sequence similarities, the identified proteins are classified into three subfamilies in accordance to their phylogenetic relationships, namely Cu/ZnSOD, FeSOD, and MnSOD. High variability observed between Cu/ZnSOD with other two groups i.e. FeSOD and MnSOD which showed lesser variation within them by using secondary structure predication. Subcellular localization suggested that genes encoding FeSOD, MnSOD and Cu/ZnSOD are predominant in chloroplasts, mitochondria, and cytoplasm, respectively in studied plants. The expression profiling through microarray analysis showed varied strategies of SOD isogenes against drought stress and Cd exposure individually. From the perspective of evolution, this study would expand our knowledge for vividly understanding the role of distinctive SOD isogenes in detoxifying ROS in different plants under various abiotic stresses.

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“…Reports have shown that H 2 O 2 is a potential signaling molecule acting as a stress signal transducer that induces physiological functions for increasing photosynthetic and growth performance of plants under abiotic stress condition (Neill et al, 2002;Hung et al, 2005;Sun et al, 2016;Asgher et al, 2021). Supplementation of H 2 O 2 mitigates abiotic stress through various physiological manifestation such as upregulating the activity of antioxidant enzymes, defense protein, and transcription factors, all these forming an integral component of the intracellular signal transduction (Gechev and Hille, 2005;Slesak et al, 2007;Sun et al, 2016;Nazir et al, 2020;Asgher et al, 2021). Sulfur (S) is one of the essential mineral nutrients.…”

mentioning

confidence: 99%

Hydrogen peroxide potentiates defense system in presence of sulfur to protect chloroplast damage and photosynthesis of wheat under drought stress

Sehar

Jahan

Masood

et al. 2020

Physiologia Plantarum

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The involvement of hydrogen peroxide (H 2 O 2 ) combined with sulfur (S) was studied in the protection of the photosynthetic performance of wheat (Triticum aestivum L.) under drought stress. The mechanisms of S-assimilation, the activity of antioxidants, glucose sensitivity, water and osmotic relations and abscisic acid (ABA) content were the focus. The combined application of 50 μM H 2 O 2 and 100 mg S kg −1 soil (sulfur) resulted in a marked increase in S-assimilation and activity of antioxidant enzymes, with decreased glucose sensitivity and ABA content causing improvement in the structure and function of the photosynthetic apparatus under drought stress. The photosynthetic performance, pigment system (PS) II activity, and growth were improved conspicuously by H 2 O 2 in the presence of S, as H 2 O 2 induced S-assimilation capacity, the activity of antioxidant enzymes, and GSH synthesis under drought stress. Our study shows that H 2 O 2 is more effective in the reversal of drought stress in the presence of S through its influence on S-assimilation, glucose sensitivity, and antioxidant system. These results provide evidence for the effectiveness of H 2 O 2 in improving photosynthesis under drought stress in the presence of S. | INTRODUCTIONDrought with annual precipitation of about <400 mm and low soil moisture content is regarded as environmental stress in crop plants

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Hydrogen peroxide as a signalling molecule in plants and its crosstalk with other plant growth regulators under heavy metal stress

Cited by 130 publications

References 212 publications

Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

Comparative response of SOD in different plants against cadmium and drought stress at the molecular level

Hydrogen peroxide potentiates defense system in presence of sulfur to protect chloroplast damage and photosynthesis of wheat under drought stress

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