Perithecia grafting experiments.

<p>Small pieces of cellophane containing “graft” fertilized wild type protoperithecia were placed on mutant “host” vegetative hyphal networks grown on synthetic crossing medium. The “host” shown are: 1) Δ<i>fmf-1</i> (left panel/A) which shows a host supporting the development of the graft perithecia. 2) Δ<i>ada-1</i> (middle panel/B) which shows a host not supporting the development of the graft perithecia. 3) Δ<i>palA</i> (right panel/C) which shows the graft inducing protoperithecia in the Δ<i>palA</i> host. Arrows point to examples of perithecia on the cellophane (left panel/A) and protoperithecia induced in the host vegetative hyphal network (right panel/C).