Effect of Salicylic Acid Treatment on Agro-Morphological Performances, Mineral Nutrition, Antioxidant Capacity, and Steviol Glycosides Content of Stevia Subjected to Salt Stress

IF 1.1 4区生物学 Q3 PLANT SCIENCES Russian Journal of Plant Physiology Pub Date : 2024-07-02 DOI:10.1134/s1021443724604634

I. Janah, A. Elhasnaoui, R. Makbal, A. Ahmali, M. Ait Tastift, K. Lamnai, S. Aissam

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Abstract

The plants are often exposed to a variety of abiotic stresses that affect their yield negatively, among which, we found salt stress caused by accumulation of salts in soil. Currently, different approaches are used to reduce the detrimental effect of salt stress on plants. In light of these circumstances, the present work aims to improve the tolerance of Stevia rebaudiana Bertoni to salt stress (0 and 80 mM) using salicylic acid (0, 0.1, and 0.5 mM). The results showed that salt stress affects negatively the mineral nutrition, antioxidant activities (ABTS, FRAP, and DPPH), and steviol glycosides production. However, exogenous application of salicylic acid attenuated the depressive effects caused by salt stress by reinforcing the antioxidant system and the synthesis of osmoprotectants such as glycine betaine (54%), total soluble sugars (17%), proline (18%), and steviol glycosides (stevioside and rebaudioside A). Moreover, salicylic acid countered the decline in K (30%), P (33%), and Ca (33%) content induced by salt stress. This fundings supported that the application of salicylic acid to salt-stressed stevia plants is a promising approach to improve the salinity tolerance.

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水杨酸处理对盐胁迫下甜叶菊的农业形态表现、矿物质营养、抗氧化能力和甜菊醇苷含量的影响

摘要植物经常会受到各种非生物胁迫，这些胁迫会对其产量产生负面影响，其中我们发现土壤中盐分的积累会导致盐胁迫。目前，人们采用不同的方法来减少盐胁迫对植物的不利影响。有鉴于此，本研究旨在利用水杨酸（0、0.1 和 0.5 毫摩尔）提高甜叶菊（Stevia rebaudiana Bertoni）对盐胁迫（0 和 80 毫摩尔）的耐受性。结果表明，盐胁迫对甜叶菊的矿物质营养、抗氧化活性（ABTS、FRAP 和 DPPH）以及甜菊醇苷的产生都有负面影响。然而，外源施用水杨酸可加强抗氧化系统和渗透保护剂的合成，如甘氨酸甜菜碱（54%）、总可溶性糖（17%）、脯氨酸（18%）和甜菊醇苷（甜菊糖甙和甜菊二糖 A），从而减轻盐胁迫引起的抑制作用。此外，水杨酸还抑制了盐胁迫引起的钾（30%）、磷（33%）和钙（33%）含量的下降。这些研究结果表明，在盐胁迫甜叶菊植物中施用水杨酸是一种很有前景的提高耐盐性的方法。

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来源期刊

Russian Journal of Plant Physiology 生物-植物科学

CiteScore

4.00

自引率

14.30%

发文量

107

审稿时长

6 months

期刊介绍： Russian Journal of Plant Physiology is a leading journal in phytophysiology. It embraces the full spectrum of plant physiology and brings together the related aspects of biophysics, biochemistry, cytology, anatomy, genetics, etc. The journal publishes experimental and theoretical articles, reviews, short communications, and descriptions of new methods. Some issues cover special problems of plant physiology, thus presenting collections of articles and providing information in rapidly growing fields. The editorial board is highly interested in publishing research from all countries and accepts manuscripts in English.