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Symbiosis-stimulated chitinase isoenzymes of soybean (Glycine max (L.) Merr.)

Xie, Zhi-Ping ; Staehelin, Christian ; Wiemken, Andres ; Broughton, William J. ; Müller, Joachim ; Boller, Thomas

In: Journal of Experimental Botany, 1999, vol. 50, no. 332, p. 327-333

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    Title
    • Symbiosis-stimulated chitinase isoenzymes of soybean (Glycine max (L.) Merr.)
    Author
    • Xie, Zhi-Ping. Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
    • Staehelin, Christian. Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
    • Wiemken, Andres. Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
    • Broughton, William J.. Laboratoire de Biologie Moléculaire des Plantes Supérieures, Université de Genève, 1, Chemin de l'Impératrice, CH-1292 Chambésy/Genève, Switzerland
    • Müller, Joachim. Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
    • Boller, Thomas. Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Journal of Experimental Botany, 1999, vol. 50, no. 332, p. 327-333. Oxford University Press
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:301747
    Summary
    Isoforms of endochitinase in soybean were studied in relation to root symbiosis. Five selected cultivars differing in their nodulation potential were inoculated with two strains of Bradyrhizobium japonicum, the broad host-range Rhizobium sp. NGR234, and with the mycorrhizal fungus Glomus mosseae. Total chitinase activity in nodules was up to 7-fold higher than in uninoculated roots and in mycorrhizal roots. The chitinase activity in nodules varied depending on the strain-cultivar combination. On semi-native polyacrylamide gels, four acidic isoforms were identified. Two isoforms (CH 2 and CH 4) were constitutively present in all analysed tissues. The other two isoforms (CH 1 and CH 3) were strongly induced in nodules and were stimulated in mycorrhizal roots as compared to uninoculated roots. The induction of CH 1 varied in nodules depending on the soybean cultivar. This isoform was also stimulated in uninfected roots when they were treated with tri-iodobenzoic acid, rhizobial lipochitooligosaccharides (Nod factors) and chitotetraose. CH 3 was not affected by these stimuli indicating that this isoform could represent a marker for enzymes induced in later stages of the symbiotic interactions