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Root exudate-stimulated RNA accumulation in the arbuscular mycorrhizal fungusGigaspora rosea

Authors
Journal
Soil Biology and Biochemistry
0038-0717
Publisher
Elsevier
Publication Date
Volume
39
Issue
7
Identifiers
DOI: 10.1016/j.soilbio.2007.01.031
Keywords
  • Arbuscular Mycorrhizal Fungi
  • Gigaspora
  • Presymbiosis
  • Rna Accumulation
  • Suppressive Subtractive Hybridisation
  • T-Rflp
Disciplines
  • Biology

Abstract

Abstract Plant root exudates induce the transition from asymbiosis to presymbiosis in arbuscular mycorrhizal fungi. In order to get an insight into this developmental switch, two libraries of Gigaspora rosea and one library of Gigaspora gigantea were screened for fragments of genes that show enhanced RNA accumulation 1 h after addition of a semi-purified exudate fraction of carrot roots. Among 150 clones, 40 seemed to contain inserts of root exudate-induced genes. One of the genes, GrosRbp1, putatively encoding an RNA binding protein involved in developmental control showed RNA accumulation which correlates to the extent of stimulation of presymbiotic hyphal branching.

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