Glycolate oxidase-dependent H2O2 production regulates IAA biosynthesis in rice
Open Access
- 6 July 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in BMC Plant Biology
- Vol. 21 (1), 1-14
- https://doi.org/10.1186/s12870-021-03112-4
Abstract
Glycolate oxidase (GLO) is not only a key enzyme in photorespiration but also a major engine for H2O2 production in plants. Catalase (CAT)-dependent H2O2 decomposition has been previously reported to be involved in the regulation of IAA biosynthesis. However, it is still not known which mechanism contributed to the H2O2 production in IAA regulation. In this study, we found that in glo mutants of rice, as H2O2 levels decreased IAA contents significantly increased, whereas high CO2 abolished the difference in H2O2 and IAA contents between glo mutants and WT. Further analyses showed that tryptophan (Trp, the precursor for IAA biosynthesis in the Trp-dependent biosynthetic pathway) also accumulated due to increased tryptophan synthetase β (TSB) activity. Moreover, expression of the genes involved in Trp-dependent IAA biosynthesis and IBA to IAA conversion were correspondingly up-regulated, further implicating that both pathways contribute to IAA biosynthesis as mediated by the GLO-dependent production of H2O2. We investigated the function of GLO in IAA signaling in different levels from transcription, enzyme activities to metabolic levels. The results suggest that GLO-dependent H2O2 signaling, essentially via photorespiration, confers regulation over IAA biosynthesis in rice plants.Keywords
Funding Information
- the Major Program of Guangdong Basic and Applied Research (2019B030302006)
- National Natural Science Foundation of China (31770256, 32070265)
- Natural Science Foundation of Guangdong Province (2019A1515011438)
This publication has 60 references indexed in Scilit:
- Glycolate Oxidase Isozymes Are Coordinately Controlled by GLO1 and GLO4 in RicePLOS ONE, 2012
- Glycolate Oxidase Modulates Reactive Oxygen Species–Mediated Signal Transduction during Nonhost Resistance in Nicotiana benthamiana and ArabidopsisTHE PLANT CELL ONLINE, 2012
- Transport and Metabolism of the Endogenous Auxin Precursor Indole-3-Butyric AcidMolecular Plant, 2011
- Insights into Auxin Signaling in Plant?Pathogen InteractionsFrontiers in Plant Science, 2011
- Perturbation of Indole-3-Butyric Acid Homeostasis by the UDP-GlucosyltransferaseUGT74E2ModulatesArabidopsisArchitecture and Water Stress ToleranceTHE PLANT CELL ONLINE, 2010
- Conversion of Endogenous Indole-3-Butyric Acid to Indole-3-Acetic Acid Drives Cell Expansion in Arabidopsis SeedlingsPlant Physiology, 2010
- Glyoxylate rather than ascorbate is an efficient precursor for oxalate biosynthesis in riceJournal of Experimental Botany, 2010
- Salicylic Acid, a Multifaceted Hormone to Combat DiseaseAnnual Review of Phytopathology, 2009
- High Glycolate Oxidase Activity Is Required for Survival of Maize in Normal AirPlant Physiology, 2008
- Glutamine Synthetase-Glutamate Synthase Pathway and Glutamate Dehydrogenase Play Distinct Roles in the Sink-Source Nitrogen Cycle in TobaccoPlant Physiology, 2006