Changes induced by powdery mildew in the salicylic acid and polyamine contents and the antioxidant enzyme activities of wheat lines

Pál, Magda; Kovács, Viktória; Vida, Gyula; Szalai, Gabriella; Janda, Tibor

doi:10.1007/s10658-012-0063-9

Cited by 34 publications

(27 citation statements)

References 33 publications

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“…These results are in agreement with earlier findings where SA treatment increased the reduced glutathione content and decreased that of the oxidized form, leading to an increased GSH/GSSG ratio in pea [35]. It was also reported that controlled levels of SA were required for optimal redox homeostasis [36]; furthermore, a relationship between SA and GR or GST was detected in the wheat x powdery mildew host x pathogen interaction [37]. The present results suggest that the increased SA level during Cd stress in the roots of Mv8 and Mv…”

Section: Discussionsupporting

confidence: 92%

Synthesis and role of salicylic acid in wheat varieties with different levels of cadmium tolerance

Kovács

Gondor

Szalai

et al. 2014

Journal of Hazardous Materials

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Wheat genotypes with different endogenous SA contents were investigated, in order to reveal how cadmium influences salicylic acid (SA) synthesis, and to find possible relationships between SA and certain protective compounds (members of the antioxidants and the heavy metal detoxification system) and between the SA content and the level of cadmium tolerance.Cadmium exposure induced SA synthesis, especially in the leaves, and it is suggested that the phenyl-propanoid synthesis pathway is responsible for the accumulation of SA observed after cadmium stress. Cadmium influenced the synthesis and activation of protective compounds to varying extents in wheat genotypes with different levels of tolerance; the roots and leaves also responded differently to cadmium stress. Although a direct relationship was not found between the initial SA levels and the degree of cadmium tolerance, the results suggest that the increase in the root SA level during cadmium stress in the Mv varieties could be related with the enhancement of the internal glutathione cycle, thus inducing the antioxidant and metal detoxification systems, which promote Cd stress tolerance in wheat seedlings. The positive correlation between certain SA-related compounds and protective compounds suggests that SA-related signalling may also play a role in the acclimation to heavy metal stress.

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Section: Discussionsupporting

confidence: 92%

Synthesis and role of salicylic acid in wheat varieties with different levels of cadmium tolerance

Kovács

Gondor

Szalai

et al. 2014

Journal of Hazardous Materials

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“…Similarly, pre-treating seed with SPD or SPM was reported to enhance the SA content in wheat under salt stress . In a few studies, parallel changes in endogenous SA and PA contents were also described under stress conditions Majláth et al, 2011;Pál et al, 2013a). Based on these results a relationship is thought to exist between endogenous SA and PA contents.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 91%

Comparative analysis of polyamine metabolism in wheat and maize plants

Szalai

Janda

Darkó

et al. 2017

Plant Physiology and Biochemistry

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Please cite this article as: G. Szalai, K. Janda, E. Darkó, T. Janda, V. Peeva, M. Pál, Comparative analysis of polyamine metabolism in wheat and maize plants, Plant Physiology et Biochemistry (2017), doi: 10.1016/j.plaphy.2017.01.012. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractIn the present work changes in polyamine contents were investigated after various hydroponic polyamine treatments (putrescine, spermidine and spermine at 0.1, 0.3 and 0.5 mM concentrations) in two different crop species, wheat and maize. In contrast to putrescine, higher polyamines (spermidine and spermine) induced concentration-dependent oxidative damage in both crops, resulting in decreased biomass. The unfavourable effects of polyamines were more pronounced in the roots, and maize was more sensitive than wheat. The adverse effects of polyamine treatment were proportional to the accumulation of polyamine and the plant hormone salicylic acid in the leaves and roots of both plant species. Changes in polyamine content and catabolism during osmotic stress conditions were also studied after beneficial pre-treatment with putrescine. The greater positive effect of putrescine in wheat than in maize can be explained by differences in the polyamine metabolism under normal and osmotic stress conditions, and by relationship between polyamines and salicylic acid. The results demonstrated that changes in the polyamine pool are important for fine tuning of polyamine signalling, which influences the hormonal balance required if putrescine is to exert a protective effect under stress conditions.

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“…In addition to the application of exogenous SA being reported to provide protection against several types of stressors, unfavourable environmental conditions have also been shown to increase the endogenous SA level in plants (Horváth et al 2007, Pál et al 2013. It has long been suggested that different stressors, such as UV light, ozone fumigation or virus infection can activate a common signal transduction pathway that leads to SA accumulation and increased stress resistance (Yalpani et al 1994).…”

Section: Stress-induced Sa Levelsmentioning

confidence: 99%

“…Salicylic acid (SA) is a monohydroxy-benzoic acid, which is well-known signalling molecule playing role in local and systemic acquired resistance against pathogens as well as in acclimation to certain abiotic stressors (Raskin 1992a;Horváth et al 2007;Szalai et al 2013;Pál et al 2013). …”

Section: Introductionmentioning

confidence: 99%

Salicylic acid and photosynthesis: signalling and effects

et al. 2014

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Salicylic acid (SA) is a well-known signalling molecule playing a role in local and systemic acquired resistance against pathogens as well as in acclimation to certain abiotic stressors. As a stress-related signalling compound, it may directly or indirectly affect various physiological processes, including photosynthesis. The effects of exogenously applied SA on plant 2 physiological processes under optimal environmental conditions are controversial. Several studies suggest that SA may have a positive effect on germination or plant growth in various plant species. However, SA may also act as a stress factor, having a negative influence on various physiological processes. Its mode of action depends greatly on several factors, such as the plant species, the environmental conditions (light, temperature, etc.) and the concentration. Exogenous SA may also alleviate the damaging effects of various stress factors, and this protection may also be manifested as higher photosynthetic capacity.Unfavourable environmental conditions have also been shown to increase the endogenous SA level in plants. Recent results strongly suggest that controlled SA levels are important in plants for optimal photosynthetic performance and for acclimation to changing environmental stimuli. The present review discusses the effects of exogenous and endogenous SA on the photosynthetic processes under optimal and stress conditions. Running title: Salicylic acid and photosynthesis

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Changes induced by powdery mildew in the salicylic acid and polyamine contents and the antioxidant enzyme activities of wheat lines

Cited by 34 publications

References 33 publications

Synthesis and role of salicylic acid in wheat varieties with different levels of cadmium tolerance

Synthesis and role of salicylic acid in wheat varieties with different levels of cadmium tolerance

Comparative analysis of polyamine metabolism in wheat and maize plants

Salicylic acid and photosynthesis: signalling and effects

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