English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/218207
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Disruption of the auxin gradient in the abscission zone area evokes asymmetrical changes leading to flower separation in yellow lupine

AuthorsKućko, Agata; Wilmowicz, E.; Pokora, W.; Alché Ramírez, Juan de Dios
KeywordsAbscisic acid
Abscission zone
Auxin gradient
Ethylene
Organ separation
Reactive oxygen species
Yellowl upine
Yielding
Issue Date2020
PublisherMolecular Diversity Preservation International
CitationInternational Journal of Molecular Sciences 21: 3815 (2020)
AbstractHow auxin transport regulates organ abscission is a long-standing and intriguing question. Polar auxin transport across the abscission zone (AZ) plays a more important role in the regulation of abscission than a local concentration of this hormone. We recently reported the existence of a spatiotemporal sequential pattern of the indole-3-acetic acid (IAA) localization in the area of the yellow lupine AZ, which is a place of flower detachment. In this study, we performed analyses of AZ following treatment with an inhibitor of polar auxin transport (2,3,5-triiodobenzoic acid (TIBA)). Once we applied TIBA directly onto the AZ, we observed a strong response as demonstrated by enhanced flower abscission. To elucidate the molecular events caused by the inhibition of auxin movement, we divided the AZ into the distal and proximal part. TIBA triggered the formation of the IAA gradient between these two parts. The AZ-marker genes, which encode the downstream molecular components of the inflorescence deficient in abscission (IDA)-signaling system executing the abscission, were expressed in the distal part. The accumulation of IAA in the proximal area accelerated the biosynthesis of abscisic acid and ethylene (stimulators of flower separation), which was also reflected at the transcriptional level. Accumulated IAA up-regulated reactive oxygen species (ROS) detoxification mechanisms. Collectively, we provide new information regarding auxin-regulated processes operating in specific areas of the AZ.
Publisher version (URL)http://dx.doi.org/10.3390/ijms21113815
URIhttp://hdl.handle.net/10261/218207
DOIhttp://dx.doi.org/10.3390/ijms21113815
Identifiersdoi: 10.3390/ijms21113815
issn: 1422-0067
Appears in Collections:(EEZ) Artículos
Files in This Item:
File Description SizeFormat 
2020_Kucko_IJMS_OA.pdf3,21 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.