HYDROXYPROLINE-RICH GLYCOPROTEIN MESSENGER-RNA ACCUMULATION IN MAIZE ROOT-CELLS COLONIZED BY AN ARBUSCULAR MYCORRHIZAL FUNGUS AS REVEALED BY IN-SITU HYBRIDIZATION

To determine whether the expression of cell wall related genes changes during the establishment of an arbuscular mycorrhizal symbiosis (AM), we studied the expression of a maize hydroxyproline-rich glycoprotein (HRGP) gene. In situ hybridization showed that, in differentiated cel ls of maize roots, mRNA accumulation corresponding to the gene encodin g for HRGP was only found when the cells were colonized by the endomyc orrhizal fungus Glomus versiforme.