Figure 1

The Secteur and its transmission through contamination tests in Nectria haematococca. (A) Wild-type strain exhibiting three spontaneous Secteurs (1, 2, 3). (B) s*₇₈₉ mutant. (C) Contamination tests, using plugs from a Secteur or from s*₇₈₉, on wild type (wt), result in one Secteur at each infection point. (D)Contamination tests on s ₁ mutant did not result in the induction of any Secteur at the infection points.