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Chitinases in root nodules
Stockholm University, Faculty of Science, Department of Botany.
Stockholm University, Faculty of Science, Department of Botany.
2008 (English)In: Plant Biotechnology, ISSN 1342-4580, Vol. 25, no 3, 299-307 p.Article, review/survey (Other (popular science, discussion, etc.)) Published
Abstract [en]

The abundance of chitinases in plants is surprising in view of the fact that plants do not contain chitin.

However, plant chitinases have been shown to play a role in defense, growth and developmental processes. They are also

involved in plant-bacterial symbioses. Two groups of plants, legumes and actinorhizal plants, are able to enter root-nodule

symbioses with nitrogen fixing bacteria, rhizobia and Frankia strains, respectively, and plant chitinases are involved in these

interactions. None of these bacteria contain chitin in their cell walls but rhizobia produce chitinaceous signal factors. To find

out whether symbiosis-related chitinases belonged to phylogenetically distinct subgroups, a phylogenetic analysis was

performed including all chitinases of one dicot, Arabidopsis, and one monocot, rice. The results show that conserved class

I- and class III-chitinases were recruited in both types of root nodule symbioses. Since no chitinaceous signal molecules are

formed by Frankia, a role of chitinases in the control of microbial signaling is unlikely. Alternative roles of chitinases in

root nodules are discussed.

Place, publisher, year, edition, pages
2008. Vol. 25, no 3, 299-307 p.
URN: urn:nbn:se:su:diva-18136OAI: diva2:184659
Available from: 2009-01-23 Created: 2009-01-23 Last updated: 2011-01-10Bibliographically approved

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Santos, PatriciaPawlowski, Katharina
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