Mechanistic Insight of Allantoin in Protecting Tomato Plants Against Ultraviolet C Stress

Tahjib‐Ul‐Arif, Md.; Sohag, Abdullah Al Mamun; Latef, Arafat Abdel Hamed Abdel; Ragaey, Marwa M.

doi:10.3390/plants10010011

Cited by 27 publications

(26 citation statements)

References 111 publications

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“…Heavy metals are chelated intracellularly by GSH, ASC, flavonoids, and certain ligands such as metallothioneins (MC) and phytochelatins (PC) to eliminate excessive buildup in plant cytosol [ 35 ]. Furthermore, non-enzymatic antioxidants can detoxify ROS and reduce oxidative stress in stressful situations [ 36 ]. In this study, we identified non-enzymatic antioxidants as well as several associated enzymes.…”

Section: Resultsmentioning

confidence: 99%

Fluoride mitigates aluminum-toxicity in barley: morpho-physiological responses and biochemical mechanisms

2022

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Background To our knowledge, the role of exogenous fluoride (F–) on aluminum (Al)-stress mitigation in plants has not been investigated yet. In this experiment, barley (Hordeum vulgaris) seedlings were exposed to excessive Al3+ concentrations (aluminum chloride, 0.5, 1.0, 2.0, 3.0, and 4.0 mM) with and without fluoride (0.025% sodium fluoride) to explore the possible roles of fluoride on the alleviation of Al-toxicity. Results Overall, Al-stress caused inhibition of growth and the production of photosynthetic pigments. Principal component analysis showed that the growth inhibitory effects were driven by increased oxidative stress and the interruption of water balance in barley under Al-stress. Fluoride priming, on the other hand, enhanced growth traits, chlorophyll a and b content, as well as invigorated the protection against oxidative damage by enhancing overall antioxidant capacity. Fluoride also improved osmotic balance by protecting the plasma membrane. Fluoride reduced endogenous Al3+ content, restored Al-induced inhibition of glutathione-S-transferase, and increased the contents of phytochelatins and metallothioneins, suggesting that fluoride reduced Al3+ uptake and improved chelation of Al3+. Conclusions Aluminum chloride-induced harmful effects are abridged by sodium fluoride on barely via enhancing antioxidative responses, the chelation mechanism causing reduction of Al uptake and accumulation of barely tissues. Advanced investigations are necessary to uncover the putative mechanisms underpinning fluoride-induced Al-stress tolerance in barley and other economically significant crops, where our results might serve as a solid reference.

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Section: Resultsmentioning

confidence: 99%

Fluoride mitigates aluminum-toxicity in barley: morpho-physiological responses and biochemical mechanisms

2022

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“…Furthermore, the phenolic contents increased due to salinity stress. Phenolics are antioxidant compounds that contribute to the defense system and scavenge ROS induced by different stresses [ 55 ]. The activation of phenolics was further upregulated by exogenous treatment using NO sources.…”

Section: Discussionmentioning

confidence: 99%

Role of Signaling Molecules Sodium Nitroprusside and Arginine in Alleviating Salt-Induced Oxidative Stress in Wheat

Ragaey

Sadak

Dawood

et al. 2022

Plants

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Nitric oxide (NO) is a well-accepted signaling molecule that has regulatory effects on plants under various stresses. Salinity is a major issue that adversely affects plant growth and productivity. The current study was carried out to investigate changes in the growth, biochemical parameters, and yield of wheat plants in response to NO donors, namely sodium nitroprusside (SNP) (2.5 and 5.0 mM) and arginine (10 and 20 mM), under two salinity levels (1.2 mM and 85.5 mM NaCl). Salinity stress significantly decreased the lengths and weights of plant parts (shoot, tiller, and root) and reduced the flag leaf area, photosynthetic pigments, indole acetic acid (IAA), and yield and its components. Moreover, salt stress induced a significant accumulation of some osmoprotectants (total soluble sugars (TSS) and amino acids, especially proline) and triggered the accumulation of hydrogen peroxide (H2O2) and lipid peroxidation in wheat leaves. In contrast, arginine and SNP treatments significantly mitigated the negative impacts of salinity on growth and productivity via enhancing photosynthetic pigments, nitrate reductase, phenolic compounds, IAA, TSS, free amino acids, and proline. In addition, SNP and arginine potentially reduced oxidative damage by decreasing H2O2 and lipid peroxidation through the induction of antioxidant enzymes. The individual amino acid composition of wheat grains under the interactive effect of salinity and NO sources has been scarcely documented until now. In this study, the NO sources restrained the reduction in essential amino acids (isoleucine and lysine) of wheat grains under salinity stress and further stimulated the contents of non-essential and total aromatic amino acids. Interestingly, the applied protectants recovered the decrease in arginine and serine induced by salinity stress. Thus, SNP or arginine at the levels of 5.0 and 20 mM, respectively, had a profound effect on modulating the salt stress of wheat throughout the life cycle.

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“…3). This could be explained by the reduced level of the antioxidant allantoin, which is important in scavenging ROS (Brychkova et al , 2008 a ; Dawood et al , 2021) in Atxdh1 mutant leaves, resulting in lower antioxidant capacity under the applied stresses. Additionally, allantoin was shown to induce human wound skin healing by increasing collagen deposition (Araújo et al , 2010; Durmus et al , 2012), suggesting that allantoin accumulation after leaf wounding in Arabidopsis might heal at least in part, damaged plant cell wall and membranes.…”

Section: Discussionmentioning

confidence: 99%

Ureides are similarly accumulated in response to UV-C irradiation and wound but differently remobilized during recovery in Arabidopsis leaves

Soltabayeva

Bekturova

Kurmanbayeva

et al. 2021

Preprint

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To examine a role of purine degraded metabolites in response to wounding or UV-C stress, the Arabidopsis wild-type and Atxdh1 KO mutants, defective in xanthine dehydrogenase1 (XDH1), were exposed to wounding and UV-C irradiation stress. In Atxdh1 mutant, wounding or UV-C stresses resulted in lower fresh-weight, increased senescence symptoms and higher tissue cell death rate compared to Wild-type. Additionally, Wild-type exhibited lower levels of oxidative stress indicators; reactive oxygen species and malondialdehyde than Atxdh1 mutant leaves. Notably, purine degradation transcripts and proteins were orchestrated to lead to enhanced ureide levels in Wild-type leaves 24 h after applying UV-C or wound stress. Yet, different remobilization of the accumulated ureides was noticed 72 h after stresses application. In plants treated with UV-C the allantoin level was highest in young leaves, whereas in wounded plants it was lowest in the young leaves, accumulated mainly in the middle and wounded leaves. The results indicate that in UV-C treated Wild-type, during the recovery period from stress, ureides are remobilized from the lower older leaves to support young leaf growth. In contrast, after wounding, the ureides are remobilized to the young leaves, yet more to the middle wounded leaves, to function as antioxidants and/or healing agents.

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Mechanistic Insight of Allantoin in Protecting Tomato Plants Against Ultraviolet C Stress

Cited by 27 publications

References 111 publications

Fluoride mitigates aluminum-toxicity in barley: morpho-physiological responses and biochemical mechanisms

Fluoride mitigates aluminum-toxicity in barley: morpho-physiological responses and biochemical mechanisms

Role of Signaling Molecules Sodium Nitroprusside and Arginine in Alleviating Salt-Induced Oxidative Stress in Wheat

Ureides are similarly accumulated in response to UV-C irradiation and wound but differently remobilized during recovery in Arabidopsis leaves

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