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Glucosinolate Catabolism Maintains Glucosinolate Profiles and Transport in Sulfur-Starved Arabidopsis.
- Source :
-
Plant & Cell Physiology . Dec2023, Vol. 64 Issue 12, p1534-1550. 17p. - Publication Year :
- 2023
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Abstract
- Glucosinolates (GSLs) are sulfur (S)-rich specialized metabolites present in Brassicales order plants. Our previous study found that GSL can function as a S source in Arabidopsis seedlings via its catabolism catalyzed by two β-glucosidases (BGLUs), BGLU28 and BGLU30. However, as GSL profiles in plants vary among growth stages and organs, the potential contribution of BGLU28/30-dependent GSL catabolism at the reproductive growth stage needs verification. Thus, in this study, we assessed growth, metabolic and transcriptional phenotypes of mature bglu28/30 double mutants grown under different S conditions. Our results showed that compared to wild-type plants grown under −S, mature bglu28/30 mutants displayed impaired growth and accumulated increased levels of GSL in their reproductive organs and rosette leaves of before-bolting plants. In contrast, the levels of primary S-containing metabolites, glutathione and cysteine decreased in their mature seeds. Furthermore, the transport of GSL from rosette leaves to the reproductive organs was stimulated in the bglu28/30 mutants under −S. Transcriptome analysis revealed that genes related to other biological processes, such as ethylene response, defense response and plant response to heat, responded differentially to −S in the bglu28/30 mutants. Altogether, these findings broadened our understanding of the roles of BGLU28/30-dependent GSL catabolism in plant adaptation to nutrient stress. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CATABOLISM
*GENITALIA
*PLANT adaptation
*PLANT nutrients
*GLUCOSINOLATES
Subjects
Details
- Language :
- English
- ISSN :
- 00320781
- Volume :
- 64
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Plant & Cell Physiology
- Publication Type :
- Academic Journal
- Accession number :
- 174386738
- Full Text :
- https://doi.org/10.1093/pcp/pcad075