Exogenous application of the apocarotenoid retinaldehyde negatively regulates auxin-mediated root growth.
Plant Physiol
; 196(2): 1659-1673, 2024 Oct 01.
Article
in En
| MEDLINE
| ID: mdl-39117340
ABSTRACT
Root development is essential for plant survival. The lack of carotenoid biosynthesis in the phytoene desaturase 3 (pds3) mutant results in short primary roots (PRs) and reduced lateral root formation. In this study, we showed that short-term inhibition of PDS by fluridone suppresses PR growth in wild type, but to a lesser extent in auxin mutants of Arabidopsis (Arabidopsis thaliana). Such an inhibition of PDS activity increased endogenous indole-3-acetic acid levels, promoted auxin signaling, and partially complemented the PR growth of an auxin-deficient mutant, the YUCCA 3 5 7 8 9 quadruple mutant (yucQ). The exogenous application of retinaldehyde (retinal), an apocarotenoid derived from ß-carotene, complemented the fluridone-induced suppression of root growth, as well as the short roots of the pds3 mutant. Retinal also partially complemented the auxin-induced suppression of root growth. These results suggest that retinal may play a role in regulating root growth by modulating endogenous auxin levels.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Retinaldehyde
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Arabidopsis
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Plant Roots
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Arabidopsis Proteins
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Indoleacetic Acids
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Mutation
Language:
En
Journal:
Plant Physiol
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Plant physiol
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Plant physiology
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: