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Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)

Bibliographic Details
Main Author: Fernandes, João Carlos Martins
Publication Date: 2009
Format: Master thesis
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10400.5/1103
Summary: Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia
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network_name_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
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spelling Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)vitis viniferaapical meristemaxillary meristemcytokinin signalling pathwaysulfurvideirameristema apicalmeristema axilarvia de sinalização das citocininasMestrado em Engenharia Agronómica - Instituto Superior de AgronomiaSulfur (S) is an essential macronutrient for plant growth and development. In vitro grapevine callus, cells and shoots in culture media in the absence of sulfur (-S) respond markedly with a reduction of growth and shoot multiplication. This may result from an interference of -S with cytokinin signal pathway (CSP) or at shoot apical meristem (SAM) or axillary meristem (AM) identity level. Cytokinins are essential plant hormones that control various processes in plants. As in Arabidopsis, Vitis CSP is composed by receptors (HKs), phosphotransmitters (HPTs) and two types of response regulators (A-type and B-type RRs). Cells in -S in the presence of cytokinin show a downregulation of most CSP genes while -S without cytokinin leads to an upregulation of A-type RRs. CSP is not significantly affected by –S in in vitro shoots, so the multiplication inhibition can be caused by a downregulation of the expression of SAM and AM identity genes, respectively STM and LAS. In vitro conditions more similar to autotrophy as Temporary Immersion System, the scarce multiplication impairment must result from the reduction of B-type RRs transcription. As a whole the present work provides new insights on the crosstalk between –S and cytokinin signaling in in vitro grapevine model systems.Amâncio, Sara Barros QueirózRepositório da Universidade de LisboaFernandes, João Carlos Martins2009-07-09T11:22:57Z20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/1103enginfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-03-17T16:03:31Zoai:repositorio.ulisboa.pt:10400.5/1103Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T04:01:28.822345Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)
title Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)
spellingShingle Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)
Fernandes, João Carlos Martins
vitis vinifera
apical meristem
axillary meristem
cytokinin signalling pathway
sulfur
videira
meristema apical
meristema axilar
via de sinalização das citocininas
title_short Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)
title_full Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)
title_fullStr Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)
title_full_unstemmed Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)
title_sort Characterization and expression of cytokinin signalling genes in sulfur deficient grapevine (Vitis vinifera L.)
author Fernandes, João Carlos Martins
author_facet Fernandes, João Carlos Martins
author_role author
dc.contributor.none.fl_str_mv Amâncio, Sara Barros Queiróz
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Fernandes, João Carlos Martins
dc.subject.por.fl_str_mv vitis vinifera
apical meristem
axillary meristem
cytokinin signalling pathway
sulfur
videira
meristema apical
meristema axilar
via de sinalização das citocininas
topic vitis vinifera
apical meristem
axillary meristem
cytokinin signalling pathway
sulfur
videira
meristema apical
meristema axilar
via de sinalização das citocininas
description Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia
publishDate 2009
dc.date.none.fl_str_mv 2009-07-09T11:22:57Z
2009
2009-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/1103
url http://hdl.handle.net/10400.5/1103
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
_version_ 1833601915020115968

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