A role for ethylene in low-oxygen signaling in rice roots.
Inhibitors of action and synthesis of ethylene (Ag(+), norbornadien, Co(2+)) were able to reduce the level of gamma-aminobutyric acid (Gaba) in rice roots during the development of an anaerobic environment. The inhibitory effect was reversed by the addition of the G protein activator 5'-guanylylimidodiphosphate. Gaba accumulation was modulated by the presence of CO(2) (inhibitor of ethylene action and synthesis) and stimulated by 2-chloroethylphosphonic acid (ethefon). These findings are consistent with a role of ethylene during a low-oxygen stress.
Reggiani
R
R
Institute of Biology and Agricultural Biotechnology, CNR, Milano, Italy. reggiani@ibba.cnr.it
D000693:Anaerobiosis / Q000187:drug effects / Q000502:physiology; D005030:Ethylenes / Q000378:metabolism*; D006165:Guanylyl Imidodiphosphate / Q000494:pharmacology; D009943:Organophosphorus Compounds / Q000494:pharmacology; D012275:Oryza / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism*; D010937:Plant Growth Regulators / Q000494:pharmacology; D018517:Plant Roots / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology*; D005680:gamma-Aminobutyric Acid / Q000096:biosynthesis
D005030:Ethylenes; D009943:Organophosphorus Compounds; D010937:Plant Growth Regulators; D006165:Guanylyl Imidodiphosphate; D005680:gamma-Aminobutyric Acid; C036216:ethylene; D010100:Oxygen; C005073:ethephon