• oxdc gene from flammulina velutipes was used to generate transgenic tomato plants. Transgenic T 1 lines showed a significant delay in symptom development. higher survival percentage witches’ broom disease. The P16 line decreased production of H 2 O the presence oxalic acid. Witches’ disease progression reduced by gene. which affects cacao tree ( Theobroma L.) is caused hemibiotrophic fungus M...