Figure 3.

Expression of the StGA20ox clones in different potato tissues. Northern analysis was carried out using 30 μg of total RNA from apex, young leaves, internodes (stem), roots, stolons, and tubers of S. tuberosum subsp. andigena plants grown under short days. Flower, fruit, and seed samples were obtained from S. demissum plants grown under long days. Ethidium-bromide staining of the gel is included to assess an equal loading of the lanes. RNA blots hybridized to probes StGA20ox1 and StGA20ox2 were exposed overnight, whereas the blot hybridized to probe StGA20ox3 was exposed for 4 d.