Journal article
Phi thickenings in Brassica oleracea roots are induced by osmotic stress and mechanical effects, both involving jasmonic acid
Journal of Experimental Botany, Vol.73(3), pp.756-769
2021
Abstract
Phi thickenings are peculiar secondary cell wall thickenings found in radial walls of cortical cells in plant roots. However, while thickenings are widespread in the plant kingdom, research into their development has been lacking. Here, we describe a simple system for rapid induction of phi thickenings in primary roots of Brassica. Four-day-old seedlings were transferred from control agar plates to new plates containing increased levels of osmotica. Phi thickening development occurred within a narrow region of the differentiation zone proportional to osmolarity, with cellulose deposition and lignification starting after 12h and 15h, respectively. However, osmoprotectants not only failed to induce phi thickenings, but inhibited induction when tested in combination with thickening-inducing osmotica. An independent, biomechanical pathway exists regulating phi thickening induction, with root growth rates and substrate texture being important factors in determining thickening induction. Phi thickening development is also controlled by stress-related plant hormones, most notably jasmonic acid, but also abscisic acid. Our research not only provides the first understanding of the developmental pathways controlling phi thickening induction, but also provides tools with which the functions of these enigmatic structures might be clarified.
Details
- Title
- Phi thickenings in Brassica oleracea roots are induced by osmotic stress and mechanical effects, both involving jasmonic acid
- Authors/Creators
- M. Aleamotuʻa (Author/Creator)J.K. Baker (Author/Creator)D.W. McCurdy (Author/Creator)D.A. Collings (Author/Creator)K. Vissenberg (Author/Creator)
- Publication Details
- Journal of Experimental Botany, Vol.73(3), pp.756-769
- Publisher
- Oxford University Press on behalf of the Society for Experimental Biology.
- Identifiers
- 991005545365107891
- Copyright
- © 2021 The Authors.
- Murdoch Affiliation
- Harry Butler Institute
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.79 Molecular & Cell Biology - Physiology
- 1.79.1696 Aquaporin Roles
- Web Of Science research areas
- Plant Sciences
- ESI research areas
- Plant & Animal Science