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Article

Treatment of Sweet Pepper with Stress Tolerance-Inducing Compounds Alleviates Salinity Stress Oxidative Damage by Mediating the Physio-Biochemical Activities and Antioxidant Systems

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Plant Pathology and Biotechnology Lab., Excellence Center (EPCRS), Faculty of Agriculture, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
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Agricultural Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
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Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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Floriculture, Ornamental Horticulture and Garden Design Department, Faculty of Agriculture, Alexandria University, Alexandria 21526, Egypt
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Rice Biotechnology Lab., Rice Research Dep., Field Crops Research Institute, Sakha, Kafr El-Sheikh 33717, ARC, Egypt
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Agricultural Botany Department, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
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Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
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Sainsbury Laboratory, University of Cambridge, Cambridge CB2 1LR, UK
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Botany Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
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Author to whom correspondence should be addressed.
Agronomy 2020, 10(1), 26; https://doi.org/10.3390/agronomy10010026
Received: 28 November 2019 / Revised: 12 December 2019 / Accepted: 19 December 2019 / Published: 23 December 2019
Salinity stress occurs due to the accumulation of high levels of salts in soil, which ultimately leads to the impairment of plant growth and crop loss. Stress tolerance-inducing compounds have a remarkable ability to improve growth and minimize the effects of salinity stress without negatively affecting the environment by controlling the physiological and molecular activities in plants. Two pot experiments were carried out in 2017 and 2018 to study the influence of salicylic acid (1 mM), yeast extract (6 g L−1), and proline (10 mM) on the physiological and biochemical parameters of sweet pepper plants under saline conditions (2000 and 4000 ppm). The results showed that salt stress led to decreasing the chlorophyll content, relative water content, and fruit yields, whereas electrolyte leakage, malondialdehyde (MDA), proline concentration, reactive oxygen species (ROS), and the activities of antioxidant enzymes increased in salt-stressed plants. The application of salicylic acid (1 mM), yeast extract (6 g L−1), and proline (10 mM) markedly improved the physiological characteristics and fruit yields of salt-stressed plants compared with untreated stressed plants. A significant reduction in electrolyte leakage, MDA, and ROS was also recorded for all treatments. In conclusion, our results reveal the important role of proline, SA, and yeast extracts in enhancing sweet pepper growth and tolerance to salinity stress via modulation of the physiological parameters and antioxidants machinery. Interestingly, proline proved to be the best treatment. View Full-Text
Keywords: Capsicum annuum L.; salt stress; salicylic acid; yeast; proline Capsicum annuum L.; salt stress; salicylic acid; yeast; proline
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MDPI and ACS Style

Abdelaal, K.A.; EL-Maghraby, L.M.; Elansary, H.; Hafez, Y.M.; Ibrahim, E.I.; El-Banna, M.; El-Esawi, M.; Elkelish, A. Treatment of Sweet Pepper with Stress Tolerance-Inducing Compounds Alleviates Salinity Stress Oxidative Damage by Mediating the Physio-Biochemical Activities and Antioxidant Systems. Agronomy 2020, 10, 26. https://doi.org/10.3390/agronomy10010026

AMA Style

Abdelaal KA, EL-Maghraby LM, Elansary H, Hafez YM, Ibrahim EI, El-Banna M, El-Esawi M, Elkelish A. Treatment of Sweet Pepper with Stress Tolerance-Inducing Compounds Alleviates Salinity Stress Oxidative Damage by Mediating the Physio-Biochemical Activities and Antioxidant Systems. Agronomy. 2020; 10(1):26. https://doi.org/10.3390/agronomy10010026

Chicago/Turabian Style

Abdelaal, Khaled A., Lamiaa M. EL-Maghraby, Hosam Elansary, Yaser M. Hafez, Eid I. Ibrahim, Mostafa El-Banna, Mohamed El-Esawi, and Amr Elkelish. 2020. "Treatment of Sweet Pepper with Stress Tolerance-Inducing Compounds Alleviates Salinity Stress Oxidative Damage by Mediating the Physio-Biochemical Activities and Antioxidant Systems" Agronomy 10, no. 1: 26. https://doi.org/10.3390/agronomy10010026

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