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Phytohormone synthesis pathways in sweet briar rose (Rosa rubiginosa L.) seedlings with high adaptation potential to soil drought

Authors :
Michał Dziurka
Joanna Gadzinowska
Tomasz Hura
Katarzyna Hura
Agnieszka Ostrowska
Source :
Plant Physiology and Biochemistry. 154:745-750
Publication Year :
2020
Publisher :
Elsevier BV, 2020.

Abstract

The study aimed to determine the phytohormone profile of sweet briar rose (Rosa rubiginosa L.) seedlings and privileged synthesis pathways of individual hormones including gibberellins, cytokinins and auxins in response to long-term soil drought. We detected eight gibberellins, nine auxins and fifteen cytokinins. Abscisic acid (ABA) was also detected as a sensitive indicator of water stress. Thirty days of soil drought induced significant increase of ABA content and species-specific quantitative changes of other phytohormones. We established preferred synthesis pathways for three gibberellins, six auxins and eight cytokinins. Both an increase and decrease in gibberellin and cytokinin levels may modulate sweet briar's response to soil water shortage. In the case of auxins, induction of effective adaptation mechanisms to extremely dry environments is mostly triggered by their rising levels. Under drought stress, sweet briar seedlings increased their gibberellin pool at the expense of reducing the pool of cytokinins and auxins. This may indicate a specific role of gibberellins in adaptation mechanisms to long-term soil water deficit developed by sweet briar.

Details

ISSN :
09819428
Volume :
154
Database :
OpenAIRE
Journal :
Plant Physiology and Biochemistry
Accession number :
edsair.doi.dedup.....00e4e82340e6d21648c5e6c64e1c1a8e
Full Text :
https://doi.org/10.1016/j.plaphy.2020.06.018