The effects of putrescine are partly overlapping with osmotic stress processes in wheat

Pál, Magda and Majláth, Imre and Németh, Edit and Hamow, Kamirán Áron and Szalai, Gabriella and Rudnóy, Szabolcs and Balassa, György and Janda, Tibor (2018) The effects of putrescine are partly overlapping with osmotic stress processes in wheat. PLANT SCIENCE. ISSN 0168-9452 (In Press)

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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 defence 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.

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