Priming Tomato Cultivars in β-sitosterol or Gibberellic Acid Improves Tolerance for Temperature Stress

Gamel, Rasha Eid; Elsayed, Ashraf; Bashasha, Jamila; Haroun, Samia

doi:10.3923/ijb.2017.1.14

Cited by 17 publications

(6 citation statements)

References 42 publications

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“…Although positive effects of b-sitosterol on plant tolerance to abiotic stresses, including drought stress in white clover (Li et al, 2019) and wheat (Elkeilsh et al, 2019), salt stress in pepper and sunflower (Abu-Muriefah 2015; Fawzia et al, 2016), and heat stress in tomato (Gamel et al, 2017), have been studied previously, this is the first study investigating how foliar application of b-sitosterol ameliorated heat-induced leaf senescence in association with mitigation of oxidative damage in a cool-season turfgrass species exposed to heat stress. The findings of our study indicate that foliar application of b-sitosterol suppressed heat-induced leaf senescence or improved heat tolerance of creeping bentgrass, as exhibited by increased TQ and Chl, and decreased EL in b-sitosterol-treated plants.…”

Section: Discussionmentioning

confidence: 99%

“…Phytosterols are present in high quantities in plant tissues, with b-sitosterol alone accounting for %50% of the total sterol content in leaves of various plant species (Nomura et al, 1999), including cool-season grass species such as hard fescue [Festuca trachyphylla (Wang et al, 2017)]. Seed priming or foliar spraying sterols have been found to have positive effects on improving plant tolerance to abiotic stresses, such as heat stress in tomato [Solanum lycopersicum (Gamel et al, 2017)], salt stress in pepper [Capsicum annuum (Abu-Muriefah, 2015)] and sunflower [Helianthus annuus (Fawzia et al, 2016)], and drought stress in wheat [Triticum aestivum (Elkeilsh et al, 2019)] and white clover [Trifolium repens (Li et al, 2019)]. Sitosterol reinforces the stabilization of liquid-disordered membranes in plants exposed to heat stress (Dufourc, 2008).…”

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confidence: 99%

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Sitosterol-mediated Antioxidant Regulation to Enhance Heat Tolerance in Creeping Bentgrass

Rossi

Huang

2022

J. Amer. Soc. Hort. Sci.

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Heat stress symptoms in cool-season plants are characterized by loss of chlorophyll (Chl) and membrane stability, as well as oxidative damage. The objectives of this study were to determine whether foliar application of β-sitosterol, a naturally occurring plant metabolite, may promote heat tolerance by suppressing heat-induced leaf senescence as indicated by the maintenance of healthy turf quality (TQ), and Chl and membrane stability; and to determine its roles in regulating antioxidant metabolism in creeping bentgrass (Agrostis stolonifera). ‘Penncross’ plants were exposed to heat stress (35/30 °C day/night) optimal temperature conditions (nonstressed control, 22/17 °C day/night) for a duration of 28 days in environment-controlled growth chambers. Plants were foliar-treated with β-sitosterol (400 µM) or water only (untreated control) before heat stress, and at 7-day intervals through 28 days of heat stress. Plants treated with β-sitosterol had significantly greater TQ and Chl content, and significantly less electrolyte leakage (EL) than untreated controls at 21 and 28 days of heat stress. Application of β-sitosterol reduced malondialdehyde (MDA) content significantly at 21 and 28 days of heat stress, and promoted the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX) from 14 through 28 days of heat stress. β-Sitosterol effectively improved heat tolerance through suppression of leaf senescence in creeping bentgrass exposed to heat stress in association with the alleviation of membrane lipid peroxidation and activation of the enzymatic antioxidant system.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Sitosterol-mediated Antioxidant Regulation to Enhance Heat Tolerance in Creeping Bentgrass

Rossi

Huang

2022

J. Amer. Soc. Hort. Sci.

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“…For chromium-treated rosemary, melatonin applications will increase its yield and EO yield by up to 25% and 100%, respectively ( Farouk and Al-Amri, 2019 ). Moreover, as an active phytosterol, β-sitosterol significantly lowers stress caused by high salt levels in tomato and sunflower ( Helianthus annuus ) and is contained in many plant species, and its density and production are significantly increased in dehydrated plants when exposed to melatonin treatment, thus hinting at the underlying relationship ( Fawzia et al., 2016 ; Gamel et al., 2017 ; Ramadan et al, 2018 ).…”

Section: Melatonin Functions Against Abiotic Stressmentioning

confidence: 99%

Melatonin-mediated development and abiotic stress tolerance in plants

Pan

Li³

et al. 2023

Front. Plant Sci.

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Melatonin is a multifunctional molecule that has been widely discovered in most plants. An increasing number of studies have shown that melatonin plays essential roles in plant growth and stress tolerance. It has been extensively applied to alleviate the harmful effects of abiotic stresses. In view of its role in regulating aspects of plant growth and development, we ponder and summarize the scientific discoveries about seed germination, root development, flowering, fruit maturation, and senescence. Under abiotic and biotic stresses, melatonin brings together many pathways to increase access to treatments for the symptoms of plants and to counteract the negative effects. It has the capacity to tackle regulation of the redox, plant hormone networks, and endogenous melatonin. Furthermore, the expression levels of several genes and the contents of diverse secondary metabolites, such as polyphenols, terpenoids, and alkaloids, were significantly altered. In this review, we intend to examine the actions of melatonin in plants from a broader perspective, explore the range of its physiological functions, and analyze the relationship between melatonin and other metabolites and metabolic pathways.

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“…On the other hand, previous studies have found that exogenous sterol treatments including the method of soaking seeds and foliar spraying could improve plant tolerance to cold and heat stress. For instance, tomato seeds soaked with 10 µM sitosterol showed distinctly promoted tolerance of tomato plants to both high and low temperature stress [87]. Similarly, the treatment of Agrostis stolonifera leaves with 400 µM sitosterol resulted in the inhibition of leaf senescence, the enhancement of membrane stability as well as the activation of plant antioxidant responses under heat stress, and ultimately enhanced plant heat tolerance [88].…”

Section: Temperature Stressmentioning

confidence: 99%

Biosynthesis and the Roles of Plant Sterols in Development and Stress Responses

Chu

et al. 2022

IJMS

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Plant sterols are important components of the cell membrane and lipid rafts, which play a crucial role in various physiological and biochemical processes during development and stress resistance in plants. In recent years, many studies in higher plants have been reported in the biosynthesis pathway of plant sterols, whereas the knowledge about the regulation and accumulation of sterols is not well understood. In this review, we summarize and discuss the recent findings in the field of plant sterols, including their biosynthesis, regulation, functions, as well as the mechanism involved in abiotic stress responses. These studies provide better knowledge on the synthesis and regulation of sterols, and the review also aimed to provide new insights for the global role of sterols, which is liable to benefit future research on the development and abiotic stress tolerance in plant.

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Priming Tomato Cultivars in β-sitosterol or Gibberellic Acid Improves Tolerance for Temperature Stress

Cited by 17 publications

References 42 publications

Sitosterol-mediated Antioxidant Regulation to Enhance Heat Tolerance in Creeping Bentgrass

Sitosterol-mediated Antioxidant Regulation to Enhance Heat Tolerance in Creeping Bentgrass

Melatonin-mediated development and abiotic stress tolerance in plants

Biosynthesis and the Roles of Plant Sterols in Development and Stress Responses

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