Ectopic expression of a stress-inducible glycosyltransferase from saffron enhances salt and oxidative stress tolerance in Arabidopsis while alters anchor root formation
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http://dx.doi.org/10.1016/j.plantsci.2015.02.004 |
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Títol
Ectopic expression of a stress-inducible glycosyltransferase from saffron enhances salt and oxidative stress tolerance in Arabidopsis while alters anchor root formationAutoria
Data de publicació
2015Editor
ElsevierISSN
0168-9452; 1873-2259Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://www.sciencedirect.com/science/article/pii/S0168945215000400Paraules clau / Matèries
Resum
Glycosyltransferases play diverse roles in cellular metabolism by modifying the activities of regulatory
metabolites. Three stress-regulated UDP-glucosyltransferase-encoding genes have been isolated fromthe
stigmas ... [+]
Glycosyltransferases play diverse roles in cellular metabolism by modifying the activities of regulatory
metabolites. Three stress-regulated UDP-glucosyltransferase-encoding genes have been isolated fromthe
stigmas of saffron, UGT85U1, UGT85U2 and UGT85V1, which belong to the UGT85 family that includes
members associated with stress responses and cell cycle regulation. Arabidopsis constitutively expressing
UGT85U1 exhibited and increased anchor root development. No differences were observed in the timing of
root emergence, in leaf, stem and flower morphology or flowering time. However, salt and oxidative stress
tolerance was enhanced in these plants. Levels of glycosylated compounds were measured in these plants
and showed changes in the composition of several indole-derivatives. Moreover, auxin levels in the roots
were higher compared to wild type. The expression of several key genes related to root development and
auxin homeostasis, including CDKB2.1, CDKB2.2, PIN2, 3 and 4; TIR1, SHR, and CYCD6, were differentially
regulated with an increase of expression level of SHR, CYCD6, CDKB2.1 and PIN2. The obtained results
showed that UGT85U1 takes part in root growth regulation via auxin signal alteration and the modified
expression of cell cycle-related genes, resulting in significantly improved survival during oxidative and
salt stress treatments. [-]
Publicat a
Plant Science 234 (2015) 60–73Drets d'accés
© 2015 Elsevier Ireland Ltd. All rights reserved.
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