Brassinosteroids Regulate Antioxidant System and Protect Chloroplast Ultrastructure of Autotoxicity-Stressed Cucumber (Cucumis sativus L.) Seedlings

Yang, Ping; Nawaz, Muhammad Azher; Li, Fuxin; Bai, Leichao; Li, Jie

doi:10.3390/agronomy9050265

Cited by 20 publications

(13 citation statements)

References 52 publications

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“…When plants faces environmental stresses CAT, SOD, APX and GR protect plants from oxidative damage [38]. Similar reports were also published in bottle gourd and cucumber [39, 40]. In the present experiment, transcript level of CAT enhanced after 7, 14 and 21 DWD.…”

Section: Discussionsupporting

confidence: 89%

Drought mediated physiological and molecular changes in muskmelon (Cucumis melo L.)

et al. 2019

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Water deficiency up to a certain level and duration leads to a stress condition called drought. It is a multi-dimensional stress causing alteration in the physiological, morphological, biochemical, and molecular traits in plants resulting in improper plant growth and development. Drought is one of the major abiotic stresses responsible for loss of crops including muskmelon (Cucumis melo. L). Muskmelon genotype SC-15, which exhibits high drought resistance as reported in our earlier reports, was exposed to deficient water condition and studied for alteration in physiological, molecular and proteomic profile changes in the leaves. Drought stress results in reduced net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration (E) rate. With expanded severity of drought, declination recorded in content of total chlorophyll and carotenoid while enhancement observed in phenol content indicating generation of oxidative stress. In contrary, activities of catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX), and guaiacol (POD) were increased under drought stress. Peptide mass fingerprinting (PMF) showed that drought increased the relative abundance of 38 spots while decreases10 spots of protein. The identified proteins belong to protein synthesis, photosynthesis, nucleotide biosynthesis, stress response, transcription regulation, metabolism, energy and DNA binding. A drought-induced MADS-box transcription factor was identified. The present findings indicate that under drought muskmelon elevates the abundance of defense proteins and suppresses catabolic proteins. The data obtained exhibits possible mechanisms adopted by muskmelon to counter the impacts of drought induced stress.

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Section: Discussionsupporting

confidence: 89%

Drought mediated physiological and molecular changes in muskmelon (Cucumis melo L.)

et al. 2019

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“…Recent work has shown that EBR can increase epicuticular wax deposition (Santos da Fonseca et al, 2020). Improved maintenance of membrane functionality and overall cell compartmentation would also prevent water loss (Yang et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Low‐dose prestorage 24‐epibrassinolide spray enhances postharvest chilling tolerance in zucchini squash ( Cucurbita pepo L.) by eliciting peroxidase and phenolic antioxidants

Massolo

Sánchez

Zaro

et al. 2022

Food Processing Preservation

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Brassinosteroids are polyhydroxy steroid hormones, tested to induce cold acclimation in whole plants and some harvested fruits. So far, no works have determined whether such strategy may improve the chilling tolerance of immaturely harvested Cucurbits, which are, among the most sensitive vegetables. Herein, we evaluated the efficacy of 24-epibrassinolide to reduce chilling injury in zucchini squash (Cucurbita pepo L.).Prestorage sprays at a dose 10-100 times lower than reported for postharvest use in other fruits (0.1 μM), markedly reduced chilling injury incidence (ca. 70%) and severity (30%-40%), decreased weight loss, and delayed yellowing. After long-term storage, epibrassinolide-sprayed zucchini maintained lower electrolyte leakage and lipid peroxidation. The treatment also increased fruit antioxidant defenses by inducing peroxidase and increasing antioxidant capacity, phenolic compounds, and peroxidase activity. This is the first report showing that low-dose prestorage 24-epibrassinolide priming enhances the cold tolerance of immaturely harvested Cucurbits, preventing postharvest chilling injury. Novelty impact statementThis is the first study showing that brassinosteroid prestorage single spray at very low dose (0.1 μM) is sufficient to enhance the chilling tolerance of immaturely harvested Cucurbit vegetables. Epibrassinolide priming may be a feasible strategy to reduce chilling damage in highly sensitive zucchini squash.

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“…To avoid this chemical stress in recycled hydroponics, finding a suitable allelochemical detoxifying method (mainly phenolic compounds) either in the nutrient solution or improving the impaired physiological processes would sustain crop production, including strawberry. Research findings also suggested that the growth inhibitory effect of autotoxicity on cucumber was reduced by the application of epibrassinolide, which enhanced the photosynthetic capacity of leaves, maintained chloroplast integrity and thylakoid structures, and effectively alleviated the membrane damage caused by lipid peroxidation and root damage (Yang et al, 2019).…”

Section: Autotoxicity Mitigation Methods Used For Strawberrymentioning

confidence: 95%

Autotoxicity in Strawberry Under Recycled Hydroponics and Its Mitigation Methods

Asaduzzaman

Asao

2020

Hort. J.

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Strawberry plants are grown in hydroponics for higher quality and yield, as this system excludes soil-borne disease issues. Recycled hydroponics is practiced to make cultivation cost-effective, sustainable, and environmentally friendly. However, due to recycling of hydroponic nutrient solution, plant root exudates accumulate, leading to autotoxicity, a form of allelopathy that inhibits growth and development. In recent decades, commercial cultivation of strawberry under greenhouse and plant factory conditions following recycled hydroponics has been widely adopted globally. Subsequently, yield decline has also been reported due to development of autotoxicity from the accumulated root exudates. In recycled hydroponic systems, strawberry plant growth is inhibited by root exudates that contain mainly phenolic acids in the culture solution. In this regard, elimination of these accumulated root exudates or allelochemicals from the culture solution would restore inhibited plant growth and yield. A number of research studies have been conducted on autotoxicity in strawberry and possible mitigation methods. These studies suggested that addition of activated charcoal in the nutrient solution, supplementation of auxin on leaves, electro-degradation of root exudates in nutrient solution, and supplementation of amino acids and/or LEDs can effectively remove/degrade/mitigate autotoxicity in strawberry grown under recycling hydroponics. This review mainly discusses the autotoxicity phenomenon in strawberry under recycled hydroponics, the responsible allelochemicals and their mechanism of action, mitigation methods and future research endeavors in this field.

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Brassinosteroids Regulate Antioxidant System and Protect Chloroplast Ultrastructure of Autotoxicity-Stressed Cucumber (Cucumis sativus L.) Seedlings

Cited by 20 publications

References 52 publications

Drought mediated physiological and molecular changes in muskmelon (Cucumis melo L.)

Drought mediated physiological and molecular changes in muskmelon (Cucumis melo L.)

Low‐dose prestorage 24‐epibrassinolide spray enhances postharvest chilling tolerance in zucchini squash ( Cucurbita pepo L.) by eliciting peroxidase and phenolic antioxidants

Autotoxicity in Strawberry Under Recycled Hydroponics and Its Mitigation Methods

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