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This article in CS

  1. Vol. 42 No. 2, p. 651-654
    Received: May 4, 2001

    * Corresponding author(s): bugbee@cc.usu.edu


Anaerobic conditions improve germination of a gibberellic acid deficient rice

  1. Jonathan M. Frantz and
  2. Bruce Bugbee *
  1. Crop Physiology Lab., Dep. of Plants, Soils, and Biometeorology, Utah State Univ., Logan, UT 84322-4820


Dwarf plants are useful in research because multiple plants can be grown in a small area. Rice (Oryza sativa L.) is especially important since its relatively simple genome has recently been sequenced. We are characterizing a gibberellic acid (GA) mutant of rice (japonica cv. ‘Shiokari,’ line N-71) that is extremely dwarf (20 cm tall). Unfortunately, this GA mutation is associated with poor germination (70%) under aerobic conditions. Neither exogenous GA nor a dormancy-breaking heat treatment improved germination. However, 95% germination was achieved by germinating the seeds anaerobically, either in a pure N2 environment or submerged in unstirred tap water. The anaerobic conditions appear to break a mild post-harvest dormancy in this rice cultivar.

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Copyright © 2002. Crop Science Society of AmericaPublished in Crop Sci.42:651–654.