Protective role of β-sitosterol or gibberellic acid to Lycopersicum esculentum cultivars under temperature stress

Haroun, Samia; Gamel, Rasha M.E.; Bashasha, Jamila; Aldrussi, I.

doi:10.21608/ejbo.2018.2486.1143

Cited by 3 publications

(3 citation statements)

References 31 publications

(32 reference statements)

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“…In this regard, researchers emphasized that because Na + ions prevent the absorption of K + ions, the reduction in K + concentration during stress is caused by the buildup of Na + ions. In addition, it is claimed that the K + ion is crucial for osmotic adjustment, especially in aged leaves (Haroun 2002;Khan et al 2022). These findings support those of Grewal (2010), who found that the decline in soil salinity levels negatively impacted the K + /Na + ratio of wheat leaves and chickpeas.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructural, Secondary Metabolite, and Antioxidant Modulation in Response to Salt-Affected Habitats Induced Oxidative Stress and Their Accumulation in Malva parviflora L. and Rumex dentatus L.

Kazamel,

Haroun,

Noureldin

et al. 2023

J Soil Sci Plant Nutr

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Salinity stress is a major abiotic factor that affects medicinal plant growth, performance, and secondary compounds. Malva parviflora L. and Rumex dentatus L. plants were collected from three habitats in the northeastern Nile Delta governorates of Damietta and El-Dakahlia. Conductivity (salinity) classified the habitats as mesophytic, moderately saline, and saline. Chemical and physical soil characteristics varied by habitat. Results show that M. parviflora L. and R. dentatus L. had high soluble sugars, total carbohydrates, electrolyte leakage, and proline in the saline habitat. In contrast, mesophytic habitats showed low content. In addition, R. dentatus L. had more antioxidant enzymes and elements in saline habitats than in mesophytic habitats. In saline habitats, M. parviflora L. and R. dentatus L. were characterized by more calcium and sodium increase than mesophytic habitats. Moreover, R. dentatus L. had more phenols, alkaloids, flavonoids, anthocyanin, and tannins under saline conditions than M. parviflora. Meanwhile, in the saline habitat, plant hormones, i.e., indole acetic acid and gibberellic acid, decreased significantly in both M. parviflora and R. dentatus than in the mesophytic habitat. Scanning Electron Microscopy (SEM) of the tested plants showed the highest stomatal frequency and area on the lower surface of mesophytic plant leaves compared to either its upper surface or both leaf surfaces in saline habitat. Hence, it can be concluded that R. dentatus plant can mitigate the negative effects of salinity by improving the qualitative and quantitative performance under salinity stress more than M. parviflora plant.

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Section: Discussionmentioning

confidence: 99%

Ultrastructural, Secondary Metabolite, and Antioxidant Modulation in Response to Salt-Affected Habitats Induced Oxidative Stress and Their Accumulation in Malva parviflora L. and Rumex dentatus L.

Kazamel,

Haroun,

Noureldin

et al. 2023

J Soil Sci Plant Nutr

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“…In this aspect, MDA was reduced, and CAT, GPX, and APX were increased in a dose-dependent manner [162]. In the same way, the application of GA (100 ppm) significantly improves CAT and PRX during treatments of tomato seedlings at low (10 • C) and high (45 • C) temperatures [163]. On the other hand, some reductions in metabolic (transpiration) and physiological (plant growth, stomatal closure, xylem vessel proliferation, and expansion) processes were observed in tomato GA biosynthesis deficient mutants exposed to drought conditions [164,165].…”

Section: Gibberellic Acid (Ga)mentioning

confidence: 99%

Uncovering the Role of Hormones in Enhancing Antioxidant Defense Systems in Stressed Tomato (Solanum lycopersicum) Plants

Hernández-Carranza,

Avila-Sosa,

Vera-López

et al. 2023

Plants

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Tomato is one of the most important fruits worldwide. It is widely consumed due to its sensory and nutritional attributes. However, like many other industrial crops, it is affected by biotic and abiotic stress factors, reducing its metabolic and physiological processes. Tomato plants possess different mechanisms of stress responses in which hormones have a pivotal role. They are responsible for a complex signaling network, where the antioxidant system (enzymatic and non-enzymatic antioxidants) is crucial for avoiding the excessive damage caused by stress factors. In this sense, it seems that hormones such as ethylene, auxins, brassinosteroids, and salicylic, jasmonic, abscisic, and gibberellic acids, play important roles in increasing antioxidant system and reducing oxidative damage caused by different stressors. Although several studies have been conducted on the stress factors, hormones, and primary metabolites of tomato plants, the effect of endogenous and/or exogenous hormones on the secondary metabolism is still poorly studied, which is paramount for tomato growing management and secondary metabolites production. Thus, this review offers an updated overview of both endogenous biosynthesis and exogenous hormone application in the antioxidant system of tomato plants as a response to biotic and abiotic stress factors.

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“…In another study with pea plants, copper induced oxidative stress was mitigated by the application of PBRs including GA 3 by decreasing protein oxidation and lipoperoxidation via increased antioxidant enzyme activities. Furthermore, exogenously applied GA increased antioxidant activities in Solanum lycopersicum which in turn improved its tolerance to high temperature(Haroun et al 2018). In another study, ascorbic acid and GA 3 applications to…”

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confidence: 93%

Bioregulators: unlocking their potential role in regulation of the plant oxidative defense system

Zulfiqar

Ashraf

2020

Plant Mol Biol

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Key message Plant bioregulators play an important role in managing oxidative stress tolerance in plants. Utilizing their ability in stress sensitive crops through genetic engineering will be a meaningful approach to manage food production under the threat of climate change. Abstract Exploitation of the plant defense system against oxidative stress to engineer tolerant plants in the climate change scenario is a sustainable and meaningful strategy. Plant bioregulators (PBRs), which are important biotic factors, are known to play a vital role not only in the development of plants, but also in inducing tolerance in plants against various environmental extremes. These bioregulators include auxins, gibberellins, cytokinins, abscisic acid, brassinosteroids, polyamines, strigolactones, and ascorbic acid and provide protection against the oxidative stress-associated reactive oxygen species through modulation or activation of a plant's antioxidant system. Therefore, exploitation of their functioning and accumulation is of considerable significance for the development of plants more tolerant of harsh environmental conditions in order to tackle the issue of food security under the threat of climate change. Therefore, this review summarizes a new line of evidence that how PBRs act as inducers of oxidative stress resistance in plants and how they could be modulated in transgenic crops via introgression of genes. Reactive oxygen species production during oxidative stress events and their neutralization through an efficient antioxidants system is comprehensively detailed. Further, the use of exogenously applied PBRs in the induction of oxidative stress resistance is discussed. Recent advances in engineering transgenic plants with modified PBR gene expression to exploit the plant defense system against oxidative stress are discussed from an agricultural perspective.

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Protective role of β-sitosterol or gibberellic acid to Lycopersicum esculentum cultivars under temperature stress

Cited by 3 publications

References 31 publications

Ultrastructural, Secondary Metabolite, and Antioxidant Modulation in Response to Salt-Affected Habitats Induced Oxidative Stress and Their Accumulation in Malva parviflora L. and Rumex dentatus L.

Ultrastructural, Secondary Metabolite, and Antioxidant Modulation in Response to Salt-Affected Habitats Induced Oxidative Stress and Their Accumulation in Malva parviflora L. and Rumex dentatus L.

Uncovering the Role of Hormones in Enhancing Antioxidant Defense Systems in Stressed Tomato (Solanum lycopersicum) Plants

Bioregulators: unlocking their potential role in regulation of the plant oxidative defense system

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