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Receptor-like kinases regulating cold acclimation in Arabidopsis thaliana
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In temperate regions plants are able to cope with freezing temperatures after sensing lower, non-freezing temperatures through a process called cold acclimation. During the past two decades insight has been gained into the complex molecular signalling controlling the cold response. However the ‘plant thermometer(s)’ which enable plants to sense and respond to changes in their thermal environment remains to be identified. Recent studies identified a possible cold-sensor protein, mutants being unable to fully activate the ICE1-mediated CBF response pathway (unpublished results). Therefore this Arabidopsis locus was termed as cold responsive membrane kinase1 (crmk1). In phylogenetic studies crmk1 forms a discrete gene pair with crmk2, both belonging to the family of leucine-rich repeat receptor like kinases (LRR-RLKs). In this study the freezing sensitive phenotype of crmk1 was confirmed, although such effect is not observed for crmk2. Interestingly an additive effect of both genes seems present in the crmk1 x crmk2 double mutant, hinting a potential functional interplay between both LRR-RLKs. This result could not be linked to an impaired cold-induced expression of CBF genes, although future work may prove these LRR-RLKs to act as cold-sensor proteins upstream of ICE1-regulated CBF pathway.


Place, publisher, year, edition, pages
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Biochemistry and Molecular Biology
URN: urn:nbn:se:umu:diva-81468OAI: diva2:655913
Available from: 2013-10-14 Created: 2013-10-11 Last updated: 2013-10-14Bibliographically approved

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