Mitigation strategy of saline stress in Fragaria vesca using natural and synthetic brassinosteroids as biostimulants.

IF 2.6 4区 生物学 Q2 PLANT SCIENCES
Ramiro N Furio, Ana C Fernández, Patricia L Albornoz, Melisa Evangelina Yonny, María Luisa Toscano Adamo, Ana I Ruiz, Mónica Azucena Nazareno, Yamilet Coll, Juan C Díaz-Ricci, Sergio M Salazar
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Abstract

Bassinosteroids (BRs) can induce plant defence responses and promote plant growth. In this work, we evaluated the effect of a natural (EP24) and a synthetic (BB16) brassinosteroid on strawberry (Fragaria vesca ) plants exposed to saline stress. Treated plants showed higher shoot dry weight and root growth compared to untreated control plants. In BR-treated plants, crown diameters increased 66% and 40%, leaf area 148% and 112%, relative water content in leaves 84% and 61%, and SPAD values 24% and 26%, in response to BB16 and EP24, respectively. A marked stomatal closure, increased leaflet lignification, and a decrease in cortex thickness, root diameter and stele radius were also observed in treated plants. Treatments also reduces stress-induced damage, as plants showed a 34% decrease in malondialdehyde content and a lower proline content compared to control plants. A 22% and 15% increase in ascorbate peroxidase and total phenolic compound activities was observed in response to BB16, and a 24% increase in total flavonoid compound in response to both BRs, under stress conditions. These results allow us to propose the use of BRs as an environmentally safe crop management strategy to overcome salinity situations that severely affect crop yield.

利用天然和合成的黄铜类固醇作为生物刺激剂,缓解佛手瓜的盐碱胁迫。
黄铜类固醇(BRs)可诱导植物防御反应并促进植物生长。在这项工作中,我们评估了天然(EP24)和合成(BB16)黄铜类固醇对受到盐胁迫的草莓(Fragaria vesca)植物的影响。与未处理的对照植物相比,处理过的植物表现出更高的嫩枝干重和根系生长。经黄铜类固醇处理的植株,在 BB16 和 EP24 的作用下,冠径分别增加了 66% 和 40%,叶面积分别增加了 148% 和 112%,叶片相对含水量分别增加了 84% 和 61%,SPAD 值分别增加了 24% 和 26%。在处理过的植株中还观察到明显的气孔关闭、小叶木质化增加,以及皮层厚度、根直径和茎杆半径减少。与对照植物相比,处理后的植物丙二醛含量减少了 34%,脯氨酸含量降低,这也减少了胁迫引起的损害。在胁迫条件下,观察到抗坏血酸过氧化物酶和总酚类化合物活性对 BB16 的反应分别增加了 22% 和 15%,总黄酮类化合物对两种 BR 的反应均增加了 24%。这些结果使我们能够建议使用 BRs 作为一种环境安全的作物管理策略,以克服严重影响作物产量的盐渍化情况。
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来源期刊
Functional Plant Biology
Functional Plant Biology 生物-植物科学
CiteScore
5.50
自引率
3.30%
发文量
156
审稿时长
1 months
期刊介绍: Functional Plant Biology (formerly known as Australian Journal of Plant Physiology) publishes papers of a broad interest that advance our knowledge on mechanisms by which plants operate and interact with environment. Of specific interest are mechanisms and signal transduction pathways by which plants adapt to extreme environmental conditions such as high and low temperatures, drought, flooding, salinity, pathogens, and other major abiotic and biotic stress factors. FPB also encourages papers on emerging concepts and new tools in plant biology, and studies on the following functional areas encompassing work from the molecular through whole plant to community scale. FPB does not publish merely phenomenological observations or findings of merely applied significance. Functional Plant Biology is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science. Functional Plant Biology is published in affiliation with the Federation of European Societies of Plant Biology and in Australia, is associated with the Australian Society of Plant Scientists and the New Zealand Society of Plant Biologists.
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