Record ID No. |
1937 |
Author(s) |
Walter F., Mukherjee K., Deshmukh S.D., Achatz B., Sharma M., Schaefer P., Kogel K.H , 2008 |
Affiliation |
Univ Giessen, Inst Phytopathol & Appl Zool, Res Ctr Biosyst Land Use & Nutr, Heinrich Buff Ring 26-32, D-35392 Giessen, GERMANY |
Title |
Systemic and local modulation of plant responses by Piriformospora indica and related Sebacinales species |
Source. Vol.(no):Page |
Journal of Plant Physiology.165(1):60-70p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
GERMANY, Europe |
Abstracts |
Piriformospora indica is a fungus of the order Sebacinales (Basidiomycota)
infesting roots of mono- and dicotyledonous plants. Endophytic fungal colonization leads to
enhanced plant growth while host cell. Death is required for proliferation in differentiated root
tissue to form a mutualistic interaction. Colonization of barley roots by P. Indica and related
Sebacina vermifera strains also leads to systemic resistance against the leaf pathogenic fungus
Blumerio graminis f.sp. Hordei due to a yet unknown mechanism of induced resistance. In order to
elucidate plant response pathways governed by these root endophytes, we analyzed gene expression
in barley plants exhibiting an established symbiosis with P. Indica 3 weeks after inoculation. P.
Indica-cotonized roots showed no induction of defence-related genes, white other genes showed a
differential regulation pattern indicating a faster P. Indica-dependent root development. Gene
expression analysis of leaves detected only few systemically induced mRNAs. Among differentially
regulated transcripts, we characterized the pathogenesis-related gene HvPr17b and the molecular
chaperone HvHsp70 in more detail. HvPr17b shows similarity with TaWC15, a wheat gene inducible by
chemical resistance inducers and salicylate, and was previously proven to exhibit antifungal
activity against B. Graminis. HvHsp70 is the first gene found to systemically indicate root
colonization with endophytic fungi of the order Sebocinales. Both genes are discussed as markers
for endophytic colonization and resulting systemic responses. (C) 2007 Elsevier GmbH. All rights
reserved. |