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dc.contributor.author
Ré, Delfina Adela
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dc.contributor.author
Capella, Matias
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dc.contributor.author
Bonaventure, Gustavo
dc.contributor.author
Chan, Raquel Lia
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dc.date.available
2016-12-16T21:57:54Z
dc.date.issued
2014-06
dc.identifier.citation
Ré, Delfina Adela; Capella, Matias; Bonaventure, Gustavo; Chan, Raquel Lia; Arabidopsis AtHB7 and AtHB12 evolved divergently to fine tune processes associated with growth and responses to water stress; Biomed Central; Bmc Plant Biology; 14; 150; 6-2014; 1-14
dc.identifier.issn
1471-2229
dc.identifier.uri
http://hdl.handle.net/11336/9679
dc.description.abstract
Background: Arabidopsis AtHB7 and AtHB12 transcription factors (TFs) belong to the homeodomain-leucine zipper subfamily I (HD-Zip I) and present 62% amino acid identity. These TFs have been associated with the control of plant development and abiotic stress responses; however, at present it is not completely understood how AtHB7 and AtHB12 regulate these processes. Results: By using different expression analysis approaches, we found that AtHB12 is expressed at higher levels during early Arabidopsis thaliana development whereas AtHB7 during later developmental stages. Moreover, by analysing gene expression in single and double Arabidopsis mutants and in transgenic plants ectopically expressing these TFs, we discovered a complex mechanism dependent on the plant developmental stage and in which AtHB7 and AtHB12 affect the expression of each other. Phenotypic analysis of transgenic plants revealed that AtHB12 induces root elongation and leaf development in young plants under standard growth conditions, and seed production in water-stressed plants. In contrast, AtHB7 promotes leaf development, chlorophyll levels and photosynthesis and reduces stomatal conductance in mature plants. Moreover AtHB7 delays senescence processes in standard growth conditions. Conclusions: We demonstrate that AtHB7 and AtHB12 have overlapping yet specific roles in several processes related to development and water stress responses. The analysis of mutant and transgenic plants indicated that the expression of AtHB7 and AtHB12 is regulated in a coordinated manner, depending on the plant developmental stage and the environmental conditions. The results suggested that AtHB7 and AtHB12 evolved divergently to fine tune processes associated with development and responses to mild water stress.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Biomed Central
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
Athb7
dc.subject
Athb12
dc.subject
Homeodomain-Leucine Zipper (Hd-Zip I)
dc.subject
Moderate Water Stress
dc.subject
Plant Growth
dc.subject.classification
Bioquímica y Biología Molecular
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Arabidopsis AtHB7 and AtHB12 evolved divergently to fine tune processes associated with growth and responses to water stress
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-11-23T20:14:31Z
dc.journal.volume
14
dc.journal.number
150
dc.journal.pagination
1-14
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Ré, Delfina Adela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Agrobiotecnologia del Litoral; Argentina
dc.description.fil
Fil: Capella, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Agrobiotecnologia del Litoral; Argentina
dc.description.fil
Fil: Bonaventure, Gustavo. Max Planck Institut Jena; Bélgica
dc.description.fil
Fil: Chan, Raquel Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Agrobiotecnologia del Litoral; Argentina
dc.journal.title
Bmc Plant Biology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://bmcplantbiol.biomedcentral.com/articles/10.1186/1471-2229-14-150
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org//10.1186/1471-2229-14-150
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24884528/
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