Changes in indoleacetic acid production and chromosome length polymorphism in clofibric acid resistant mutants of Taphrina wiesneri and Taphrina deformans

Tetsuji YAMADA, Hiroshi TSUKAMOTO, Tomonori SHIRAISHI, Shinji KAWAMATA, Hachiro OKU
1990 Japanese Journal of Phytopathology  
Taphrina wiesneri and T. deformans, causal agents of plant hyperplastic diseases, produce indoleacetic acid (IAA) via indolepyruvic acid and indoleacetaldehyde from L-tryptophan as intermediates. They also convert indoleacetonitrile into IAA. We have isolated Iaa-mutants of these Taphrina spp, by the treatment with clofibric acid. These mutants are Pur-(deficient in purine biosynthesis) and exhibit unique morphology including the smaller conidium size. They can no longer accumulate IAA in
more » ... e filtrate but accumulate indoleethanol with the addition of tryptophan. They show significantly different chromosome length polymorphism from the parental ones. However, the length of the three chromosomal DNA in Iaa-mutants of T. wiesneri and T. deformans is identical.
doi:10.3186/jjphytopath.56.651 fatcat:nnntfrnhfrdwtgbpmjszrup5sa