Ethylene-induced Stem Growth of Deepwater Rice Is Correlated with Expression of Gibberellin- and Abscisic Acid-biosynthetic Genes
2007
Choi, D.S. (Kunsan National University, Kunsan, Republic of Korea), E-mail: [email protected]
Ethylene decreases the content of endogenous abscisic acid (ABA) and increases the level of bioactive gibberellin A₁ (GA₁) in the submerged internodes of deepwater rice. During partial submergence, internodes of deepwater rice undergo rapid elongation as a result of ethylene accumulation in the internodal lacunae. In an in vitro experiment using stem sections from deepwater rice, treatment with 5 μL L-¹ ethylene promoted stem growth by up to 3.2-fold times over air treatment.
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