Anaerobic conditions improve germination of a gibberellic acid deficient rice.
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.
Frantz
Jonathan M
JM
Dep. of Plants, Soils, and Biometeorology, Utah State Univ., Logan, UT 84322-4820, USA.
Bugbee
Bruce
B
D000693:Anaerobiosis; D018525:Germination / Q000187:drug effects / Q000502:physiology*; D005875:Gibberellins / Q000235:genetics* / Q000378:metabolism / Q000494:pharmacology*; D006358:Hot Temperature; D007101:Immersion; D009154:Mutation; D009584:Nitrogen; D012275:Oryza / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development* / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D010937:Plant Growth Regulators / Q000235:genetics / Q000378:metabolism / Q000494:pharmacology*; D012639:Seeds; D014908:Triticum; D014867:Water
D005875:Gibberellins; D010937:Plant Growth Regulators; D014867:Water; C007842:gibberellic acid; D009584:Nitrogen; D010100:Oxygen