Regulatory effect of pipecolic acid (Pip) on the antioxidant system activity of Mesembryanthemum crystallinum plants exposed to bacterial treatment.

IF 5.4 2区 生物学 Q1 PLANT SCIENCES Physiologia plantarum Pub Date : 2024-11-01 DOI:10.1111/ppl.14583
Emilia Gula, Michał Dziurka, Natalia Hordyńska, Marta Libik-Konieczny
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Abstract

The presented study aims to elucidate the regulatory role of Pipecolic acid (Pip) in modulating the antioxidant system activity of Mesembryanthemum crystallinum plants exposed to Pseudomonas syringae infestation. M. crystallinum, known for its semi-halophytic nature, can transition its metabolism from C3 to CAM under salt stress conditions. The research encompasses the antioxidant system of the plants, covering both enzymatic and low molecular weight components. The findings indicate that Pip supplementation confers a beneficial effect on certain elements of the antioxidant system when the plants are subjected to stress induced by bacteria. Notably, during critical periods, particularly in the initial days post-bacterial treatment, M. crystallinum plants supplemented with Pip and exhibiting C3 metabolism display heightened total antioxidant capacity. This enhancement includes increased superoxide dismutase activity and elevated levels of glutathione and proline. However, in plants with salinity-induced CAM, where these parameters are naturally higher, the supplementation of Pip does not yield significant effects. These results validate the hypothesis that the regulatory influence of Pip on defence mechanisms against biotic stress is contingent upon the metabolic state of the plant. Furthermore, this regulatory effect is more pronounced in C3 plants of M. crystallinum than those undergoing CAM metabolism induced by salinity stress.

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哌啶醇酸(Pip)对暴露于细菌处理的结晶中菊植物抗氧化系统活性的调节作用。
本研究旨在阐明哌啶醇酸(Pip)在调节暴露于丁香假单胞菌侵染的结晶中菊株抗氧化系统活性中的调控作用。结晶中柱花以其半头状花序的特性而闻名,在盐胁迫条件下,它的新陈代谢可以从 C3 过渡到 CAM。研究涵盖了植物的抗氧化系统,包括酶和低分子量成分。研究结果表明,当植物受到细菌诱导的胁迫时,补充 Pip 会对抗氧化系统的某些元素产生有益影响。值得注意的是,在关键时期,特别是在细菌处理后的最初几天,补充了 Pip 并进行 C3 代谢的晶体植物显示出更强的总抗氧化能力。这种增强包括超氧化物歧化酶活性的增加以及谷胱甘肽和脯氨酸水平的提高。然而,在盐分诱导的 CAM 植物中,这些参数自然较高,补充 Pip 并没有产生显著效果。这些结果验证了一个假设,即 Pip 对生物胁迫防御机制的调节作用取决于植物的新陈代谢状态。此外,这种调节作用在结晶藻的 C3 植物中比在盐胁迫诱导下进行 CAM 代谢的植物中更为明显。
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来源期刊
Physiologia plantarum
Physiologia plantarum 生物-植物科学
CiteScore
11.00
自引率
3.10%
发文量
224
审稿时长
3.9 months
期刊介绍: Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.
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