A putative receptor protein kinase gene in Ipomoea trifida

We have characterized a cDNA clone, IRK1, for a putative receptor kinase from a stigma cDNA library of Ipomoea trifida. IRK1 protein contains an extracellular receptor-like domain and the consensus sequences diagnostic of serine/threonine protein kinase. Both the pattern of gene expression and the results of RFLP analysis indicate that the IRK1 gene is not primarily involved in the self-incompatibility system of Ipomoea.