| Literature DB >> 27110861 |
Kyohei Kai1, Shinsuke Kasa1, Masatsugu Sakamoto1, Nozomi Aoki1, Gaku Watabe1, Takashi Yuasa2, Mari Iwaya-Inoue1, Yushi Ishibashi1.
Abstract
NADPH oxidase catalyzes the production of the superoxide anion (O2(-)), a reactive oxygen species (ROS), and regulates the germination of barley (Hordeum vulgare L.). Diphenyleneiodonium (DPI) chloride, an NADPH oxidase inhibitor, delayed barley germination, and exogenous H2O2 (an ROS) partially rescued it. Six enzymes, ent-copalyl diphosphate synthase (CPS), ent-kaurene synthase (KS), ent-kaurene oxidase (KO), ent-kaurenoic acid oxidase (KAO), GA20-oxidase (GA20ox) and GA3-oxidase (GA3ox), catalyze the transformation of trans-geranylgeranyl diphosphate to active gibberellin, which promotes germination. Exogenous H2O2 promoted the expressions of HvKAO1 and HvGA3ox1 in barley embryos. These results suggest that ROS produced by NADPH oxidase are involved in gibberellin biosynthesis through the regulation of HvKAO1 and HvGA3ox1.Entities:
Keywords: Gibberellin; NADPH oxidase; reactive oxygen species; seed germination
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Year: 2016 PMID: 27110861 PMCID: PMC4977456 DOI: 10.1080/15592324.2016.1180492
Source DB: PubMed Journal: Plant Signal Behav ISSN: 1559-2316