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dc.contributor.author
Manavella, Pablo Andrés
dc.contributor.author
Dezar, Carlos Alberto Alejandro
dc.contributor.author
Bonaventure, Gustavo
dc.contributor.author
Baldwin Ian Thomas
dc.contributor.author
Chan, Raquel Lia
dc.date.available
2019-10-15T18:00:47Z
dc.date.issued
2008-11
dc.identifier.citation
Manavella, Pablo Andrés; Dezar, Carlos Alberto Alejandro; Bonaventure, Gustavo; Baldwin Ian Thomas; Chan, Raquel Lia; HAHB4, a sunflower HD-Zip protein, integrates signals from the jasmonic acid and ethylene pathways during wounding and biotic stress responses; Wiley Blackwell Publishing, Inc; Plant Journal; 56; 3; 11-2008; 376-388
dc.identifier.issn
0960-7412
dc.identifier.uri
http://hdl.handle.net/11336/85918
dc.description.abstract
The Helianthus annuus (sunflower) HAHB4 transcription factor belongs to the HD-Zip family and its transcript levels are strongly induced when sunflower plants are attacked by herbivores, mechanically damaged or treated with methyl-jasmonic acid (MeJA) or ethylene (ET). Promoter fusion analysis, in Arabidopsis and in sunflower, demonstrated that induction of HAHB4 expression by these treatments is regulated at the transcriptional level. In transiently transformed sunflower plants HAHB4 expression upregulates the transcript levels of several genes involved in JA biosynthesis and defense-related processes such as the production of green leaf volatiles and trypsin protease inhibitors (TPI). In HAHB4 sunflower overexpressing tissue, increased activities of lipoxygenase, hydroperoxide lyase and TPI are detected whereas in HAHB4-silenced tissue these activities are reduced. Transgenic Arabidopsis thaliana and Zea mays plants ecotopically expressing HAHB4 also exhibit higher transcript levels of defense-related genes and when Spodoptera littoralis or Spodoptera frugiperda larvae are placed on each species, respectively, larvae consumed less and gain less mass compared with larvae feeding on control plants. Arabidopsis plants ectopically expressing HAHB4 had higher amounts of JA, JA-isoleucine and ET compared with control plants both before and after wounding, but reduced levels of salicylic acid (SA) after wounding and bacterial infection. We conclude that HAHB4 coordinates the production of phytohormones during biotic stress responses and mechanical damage, specifically by positively regulating JA and ET production and negatively regulating ET sensitivity and SA accumulation.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ETHYLENE
dc.subject
HAHB4
dc.subject
HD-ZIP
dc.subject
JASMONIC ACID
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PLANT DEFENSE MECHANISMS
dc.subject
WOUNDING
dc.subject.classification
Bioquímica y Biología Molecular
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Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
HAHB4, a sunflower HD-Zip protein, integrates signals from the jasmonic acid and ethylene pathways during wounding and biotic stress responses
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-09-27T14:17:00Z
dc.journal.volume
56
dc.journal.number
3
dc.journal.pagination
376-388
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Manavella, Pablo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
dc.description.fil
Fil: Dezar, Carlos Alberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
dc.description.fil
Fil: Bonaventure, Gustavo. Instituto Max Planck Institut für Chemische Okologie; Alemania
dc.description.fil
Fil: Baldwin Ian Thomas. Instituto Max Planck Institut für Chemische Okologie; Alemania
dc.description.fil
Fil: Chan, Raquel Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Agrobiotecnología del Litoral. Universidad Nacional del Litoral. Instituto de Agrobiotecnología del Litoral; Argentina
dc.journal.title
Plant Journal
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/j.1365-313X.2008.03604.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1111/j.1365-313X.2008.03604.x
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