The effects of putrescine are partly overlapping with osmotic stress processes in wheat. (March 2018)

• Record Type: Journal Article
• Authors: Pál, Magda; Majláth, Imre; Németh, Edit; Hamow, Kamirán Áron; Szalai, Gabriella; Rudnóy, Szabolcs; Balassa, György; Janda, Tibor
• Is Part Of: Plant science. Volume 268(2018)
• Page Start: 67
• Page End: 76
• Publication Date: 2018-03
• Subjects: APX ascorbate peroxidase -- DEG Differentially expressed genes -- DGDG digalactosyldiacylglycerol -- POD guaiacol peroxidase -- GR glutathione reductase -- MGDG monogalactosyldiacylglycerol -- PA polyamine -- PE phosphatidylethanolamine -- PEG polyethylene glycol -- PG phosphatidylglycerol -- PUT putrescine -- t16:1 trans-Δ3-hexadecanoic acid -- 16:0 palmitic acid -- 18:0 stearic acid -- 18:1 oleic acid -- 18:2 linoleic acid -- 18:3 linolenic acid; Gene expression -- Osmotic stress -- Putrescine -- Wheat; Botany -- Periodicals; Botanique -- Périodiques; 580
• DOI: 10.1016/j.plantsci.2017.12.011
• Languages: English
• ISSNs: 0168-9452

Abstract

Highlights: Putrescine induced the expression of various general stress related genes. Putrescine-induced changes in lipid composition were less substantial than the effects of drought. PEG specifically increased peroxidase activity. Effects of putrescine treatment and osmotic stress are partly overlapping. Abstract: Polyamine metabolism is in relation with several metabolic pathways and linked with plant hormones or signalling molecules; in addition polyamines may modulate the up- or down-regulation of gene expression. However the precise mechanism by which polyamines act at the transcription level is still unclear. In the present study the modifying effect of putrescine pre-treatment has been investigated using the microarray transcriptome profile analysis under the conditions where exogenous putrescine alleviated osmotic stress in wheat plants. Pre-treatment with putrescine induced the unique expression of various general stress-related genes. Although there were obvious differences between the effects of putrescine and polyethylene glycol treatments, there was also a remarkable overlap between the effects of putrescine and osmotic stress responses in wheat plants, suggesting that putrescine has already induced acclimation processes under control conditions. The fatty acid composition in certain lipid fractions and the antioxidant enzyme activities have also been specifically changed under osmotic stress conditions or after treatment with putrescine.