K. YAMASHITA, Z. KASAI and K. ASADA
Biological Laboratory and Institute of Food Science Kyoto Univ., Kyoto, Japan
An X-ray induced mutant "orange" in T. monococcum vulgare was used in the present studies. The mutant has carotinoid pigments but is deficient of chlorophylls, and dies at the seedling stage as do albinos. The mutant and normal plants were placed in a glass chamber containing carbon dioxide labelled with C14 for an hour and then the fixation of C14O2 was checked by cpm / 5 plants. The preliminary results are given as follows:
