Abstract of Araki et al. (1990) Plant Cell Physiol. 311 (1), 137-144.

Seedlings of Pharbitis nil Choisy cv. Violet were subjected to a single SD (floral induction) or NB (inhibition of induction). Soluble proteins were extracted from apical region of seedlings just before the treatment or at various times after the treatment and were analyzed by two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) to identify the changes specifically involved in floral induction. The patterns of polypeptides were almost identical between apices of short day-treated plants (SD-plants) and night break-treated plants (NB-plants), and quantitative differences were found in five polypeptide spots. Intensities of three of these polypeptide spots increased gradually or transiently after SD treatment. The remaining two spots increased in intensities after NB treatment. A fairly consistent results were obtained by a similar analysis of proteins labelled in vivo. These findingssuggest that there are remarkably subtle differences between the complements of proteins in the evoked and non-evoked apical meristems, and that a few consistent quantitative differences are clearly apparent at relatively early stages of formation of flowers.