Morphogenesis of root nodules in white clover Ⅲ. The effect of mutation in nod IJ genes of the microsymbiont upon the DNA level in the host tissue

摘要

On the basis of cytophotometric measurements a slightly increased DNA level in the nuclei of curled root hairs containing infection threads was obserived in white clover inoculated with wild and mutant stains of Rhizobium leguminosarum biovar. Trifolii, as compared to normal root hairs of the same plants. Cells of the toot nodule primordia in 72 h after the inoculation, As compared to the toot primary cortex, demonstrated an increased level of the nuclear DNA. No differences were observed In the nuclear DNA contents in individual layers of the 28 day-old nodules.