Exogenous ascorbic acid improves defence responses of sunflower (Helianthus annuus) exposed to multiple stresses.

Q3 Biochemistry, Genetics and Molecular Biology
Armagan Kaya
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引用次数: 4

Abstract

Ascorbic acid is an important antioxidant that plays role both on growth and development and also stress response of the plant. The purpose of this study was to determine the effect of ascorbate on physiological and biochemical changes of sunflower that was exposed to multiple stresses. Chlorophyll and carotenoid contents decreased and glutathione, ascorbate and malondialdehyde contents as well as antioxidant enzyme activities increased for sunflower plant that was exposed to 50 mM NaCl and pendimethalin at different concentrations. These changes were found to be more significant in groups simultaneously exposed to both stress factors. While malondialdehyde content decreased, chlorophyll, carotenoid, ascorbate, glutathione contents and antioxidant enzyme activities increased in plants treated exogenously with ascorbate, compared to the untreated samples. According to the findings of our study; compared to individual stress, the effect of stress is more pronounced in sunflower exposed to multiple stresses, and treatment with exogenous ascorbate reduces the negative effects of stress.

外源性抗坏血酸提高向日葵(Helianthus annuus)暴露于多种胁迫下的防御反应。
抗坏血酸是一种重要的抗氧化剂,对植物的生长发育和逆境反应都有重要作用。本研究旨在探讨抗坏血酸对多重胁迫下向日葵生理生化变化的影响。50mm NaCl和不同浓度的戊二甲基萘处理后,向日葵植株叶绿素和类胡萝卜素含量降低,谷胱甘肽、抗坏血酸和丙二醛含量升高,抗氧化酶活性升高。这些变化在同时暴露于两种压力因素的人群中更为显著。外源抗坏血酸处理的植株丙二醛含量降低,叶绿素、类胡萝卜素、抗坏血酸、谷胱甘肽含量和抗氧化酶活性均高于未处理的植株。根据我们的研究结果;与个体应激相比,多重应激对向日葵的影响更为明显,外源抗坏血酸处理可减少应激的负面影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Acta Biologica Hungarica
Acta Biologica Hungarica 生物-生物学
CiteScore
1.40
自引率
0.00%
发文量
0
审稿时长
3 months
期刊介绍: Acta Biologica Hungarica provides a forum for original research works in the field of experimental biology. It covers cytology, functional morphology, embriology, genetics, endocrinology, cellular physiology, plant physiology, neurobiology, ethology and environmental biology with emphasis on toxicology. Publishes book reviews and advertisements.
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