Glucose-induced activation of rubidium transport and water flux in sunflower root systems
Excised 20-d-old sunflower roots ( Helianthusannuus L. cv. Sun-Gro 393) were used to study the effect of different sugars on rubidium and water fluxes. The roots sensed and absorbed glucose from the external medium inducing the activation of rubidium accu- mulated in the root (Rb q root), the flux o...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2001 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/60261 |
| Acceso en línea: | http://hdl.handle.net/11441/60261 https://doi.org/10.1093/jexbot/52.354.99 |
| Access Level: | acceso abierto |
| Palabra clave: | Exudation rate Helianthus annuus rubidium transport sunflower |
| id |
ES_72d8091ffefbcedac2e1e8518f933388 |
|---|---|
| oai_identifier_str |
oai:idus.us.es:11441/60261 |
| network_acronym_str |
ES |
| network_name_str |
España |
| repository_id_str |
|
| spelling |
Glucose-induced activation of rubidium transport and water flux in sunflower root systemsQuintero Ariza, José ManuelFournier, José M.Benlloch, ManuelRamos, JoséExudation rateHelianthus annuusrubidium transportsunflowerExcised 20-d-old sunflower roots ( Helianthusannuus L. cv. Sun-Gro 393) were used to study the effect of different sugars on rubidium and water fluxes. The roots sensed and absorbed glucose from the external medium inducing the activation of rubidium accu- mulated in the root (Rb q root), the flux of exuded rubidium ( J Rb ) and, to a lesser degree, the exudation rate ( J v ). These effects were also triggered by fructose, but not by 6-deoxyglucose (6-dG), a glucose analogue which is not a substrate for hexokinase (HXK). The effect of 2-deoxyglucose (2-dG), an analogue that is phosphorylated but not further metabolized, was complex, suggesting an inhibitory effect on solute transport to the xylem. The amounts of glucose required to activate rubidium and water fluxes were similar to those previously reported to regulate different processes in other plants (0.5±10 mM). When sorbitol was used instead of glucose, neither rubidium uptake (Rb q root plus J Rb ) nor J v was activated. It is proposed that glucose present in the root plays an important signalling role in the regulation of Rb q (K q ) and water transport in plant rootsMinisterio de Educación y Cultura PB98-102Ministerio de Educación y Cultura PB98-1036Society for Experimental BiologyAgronomíaAGR188: AgronomiaMinisterio de Educación y Cultura (MEC). España2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/11441/60261https://doi.org/10.1093/jexbot/52.354.99reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésJournal of Experimental Botany, 2001 (52 (354)), 99-104.PB98-102PB98-1036https://academic.oup.com/jxb/article/52/354/99/675972/Glucose-induced-activation-of-rubidium-transporthttps://academic.oup.com/jxb/issueinfo:eu-repo/semantics/openAccessoai:idus.us.es:11441/602612026-06-17T12:51:07Z |
| dc.title.none.fl_str_mv |
Glucose-induced activation of rubidium transport and water flux in sunflower root systems |
| title |
Glucose-induced activation of rubidium transport and water flux in sunflower root systems |
| spellingShingle |
Glucose-induced activation of rubidium transport and water flux in sunflower root systems Quintero Ariza, José Manuel Exudation rate Helianthus annuus rubidium transport sunflower |
| title_short |
Glucose-induced activation of rubidium transport and water flux in sunflower root systems |
| title_full |
Glucose-induced activation of rubidium transport and water flux in sunflower root systems |
| title_fullStr |
Glucose-induced activation of rubidium transport and water flux in sunflower root systems |
| title_full_unstemmed |
Glucose-induced activation of rubidium transport and water flux in sunflower root systems |
| title_sort |
Glucose-induced activation of rubidium transport and water flux in sunflower root systems |
| dc.creator.none.fl_str_mv |
Quintero Ariza, José Manuel Fournier, José M. Benlloch, Manuel Ramos, José |
| author |
Quintero Ariza, José Manuel |
| author_facet |
Quintero Ariza, José Manuel Fournier, José M. Benlloch, Manuel Ramos, José |
| author_role |
author |
| author2 |
Fournier, José M. Benlloch, Manuel Ramos, José |
| author2_role |
author author author |
| dc.contributor.none.fl_str_mv |
Agronomía AGR188: Agronomia Ministerio de Educación y Cultura (MEC). España |
| dc.subject.none.fl_str_mv |
Exudation rate Helianthus annuus rubidium transport sunflower |
| topic |
Exudation rate Helianthus annuus rubidium transport sunflower |
| description |
Excised 20-d-old sunflower roots ( Helianthusannuus L. cv. Sun-Gro 393) were used to study the effect of different sugars on rubidium and water fluxes. The roots sensed and absorbed glucose from the external medium inducing the activation of rubidium accu- mulated in the root (Rb q root), the flux of exuded rubidium ( J Rb ) and, to a lesser degree, the exudation rate ( J v ). These effects were also triggered by fructose, but not by 6-deoxyglucose (6-dG), a glucose analogue which is not a substrate for hexokinase (HXK). The effect of 2-deoxyglucose (2-dG), an analogue that is phosphorylated but not further metabolized, was complex, suggesting an inhibitory effect on solute transport to the xylem. The amounts of glucose required to activate rubidium and water fluxes were similar to those previously reported to regulate different processes in other plants (0.5±10 mM). When sorbitol was used instead of glucose, neither rubidium uptake (Rb q root plus J Rb ) nor J v was activated. It is proposed that glucose present in the root plays an important signalling role in the regulation of Rb q (K q ) and water transport in plant roots |
| publishDate |
2001 |
| dc.date.none.fl_str_mv |
2001 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11441/60261 https://doi.org/10.1093/jexbot/52.354.99 |
| url |
http://hdl.handle.net/11441/60261 https://doi.org/10.1093/jexbot/52.354.99 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Journal of Experimental Botany, 2001 (52 (354)), 99-104. PB98-102 PB98-1036 https://academic.oup.com/jxb/article/52/354/99/675972/Glucose-induced-activation-of-rubidium-transport https://academic.oup.com/jxb/issue |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Society for Experimental Biology |
| publisher.none.fl_str_mv |
Society for Experimental Biology |
| dc.source.none.fl_str_mv |
reponame:idUS. Depósito de Investigación de la Universidad de Sevilla instname:Universidad de Sevilla (US) |
| instname_str |
Universidad de Sevilla (US) |
| reponame_str |
idUS. Depósito de Investigación de la Universidad de Sevilla |
| collection |
idUS. Depósito de Investigación de la Universidad de Sevilla |
| repository.name.fl_str_mv |
|
| repository.mail.fl_str_mv |
|
| _version_ |
1869410765404897280 |
| score |
15,301603 |