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white panicle2 encoding thioredoxin z, regulates plastid RNA editing by interacting with multiple organellar RNA editing factors in rice.
- Source :
- New Phytologist; Mar2021, Vol. 229 Issue 5, p2693-2706, 14p
- Publication Year :
- 2021
-
Abstract
- Summary: Thioredoxins (TRXs) occur in plant chloroplasts as complex disulphide oxidoreductases. Although many biological processes are regulated by thioredoxins, the regulatory mechanism of chloroplast TRXs are largely unknown.Here we report a rice white panicle2 mutant caused by a mutation in the thioredoxin z gene, an orthologue of AtTRX z in Arabidopsis. white panicle2 (wp2) seedlings exhibited a high‐temperature‐sensitive albinic phenotype.We found that plastid multiple organellar RNA editing factors (MORFs) were the regulatory targets of thioredoxin z. We showed that OsTRX z protein physically interacts with OsMORFs in a redox‐dependent manner and that the redox state of a conserved cysteine in the MORF box is essential for MORF–MORF interactions. wp2 and OsTRX z knockout lines show reduced editing efficiencies in many plastidial‐encoded genes especially under high‐temperature conditions. An Arabidopsis trx z mutant also exhibited significantly reduced chloroplast RNA editing.Our combined results suggest that thioredoxin z regulates chloroplast RNA editing in plants by controlling the redox state of MORFs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0028646X
- Volume :
- 229
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- New Phytologist
- Publication Type :
- Academic Journal
- Accession number :
- 148477757
- Full Text :
- https://doi.org/10.1111/nph.17047