A non-ethylene-producing isolate of the green mould fungus Penicillium digitatum Sacc. was used to test the rôle of ethylene in the pathogenicity of this fungus on citrus fruits. This isolate was similar to the wild-type, ethylene-producing isolate in morphological characteristics and growth rate both in vitro and in vivo. However, it did not produce ethylene in vitro, nor was ethylene produced by the disease caused by this isolate. Based on these finidings, it was concluded that ethylene, which is normally produced at very high rates by Penicillium digitatum Sacc. in vitro or in vivo, has no clear role in the pathogenicity of this fungus.
A non-ethylene-producing isolate of the green mould fungus Penicillium digitatum Sacc. was used to test the rôle of ethylene in the pathogenicity of this fungus on citrus fruits. This isolate was similar to the wild-type, ethylene-producing isolate in morphological characteristics and growth rate both in vitro and in vivo. However, it did not produce ethylene in vitro, nor was ethylene produced by the disease caused by this isolate. Based on these finidings, it was concluded that ethylene, which is normally produced at very high rates by Penicillium digitatum Sacc. in vitro or in vivo, has no clear role in the pathogenicity of this fungus.