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NOTES

Anaerobic conditions improve germination of a gibberellic acid deficient rice

Crop Physiology Lab., Dep. of Plants, Soils, and Biometeorology, Utah State Univ., Logan, UT 84322-4820

* Corresponding author (bugbee{at}cc.usu.edu)

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.

This article has been cited by other articles:

				J. M. Frantz, D. Pinnock, S. Klassen, and B. Bugbee Characterizing the Environmental Response of a Gibberellic Acid-Deficient Rice for Use as a Model Crop Agron. J., July 1, 2004; 96(4): 1172 - 1181. [Abstract] [Full Text] [PDF]