Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/42618
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Adaptation of barley to mild winters: A role for PPDH2 |
Autor: | Casao Acerete, Cristina CSIC; Karsaï, Ildikó; Igartua Arregui, Ernesto CSIC ORCID ; Gracia Gimeno, María Pilar CSIC ORCID ; Veisz, Ottó B.; Casas Cendoya, Ana María CSIC ORCID | Fecha de publicación: | 18-nov-2011 | Editor: | BioMed Central | Citación: | Casao C, Karsai I, Igartua E, Gracia P, Veisz O, Casas AM. Adaptation of barley to mild winters: A role for PPDH2. BMC Plant Biology 11: 164 (2011) | Resumen: | Background Understanding the adaptation of cereals to environmental conditions is one of the key areas in which plant science can contribute to tackling challenges presented by climate change. Temperature and day length are the main environmental regulators of flowering and drivers of adaptation in temperate cereals. The major genes that control flowering time in barley in response to environmental cues are VRNH1, VRNH2, VRNH3, PPDH1, and PPDH2 (candidate gene HvFT3). These genes from the vernalization and photoperiod pathways show complex interactions to promote flowering that are still not understood fully. In particular, PPDH2 function is assumed to be limited to the ability of a short photoperiod to promote flowering. Evidence from the fields of biodiversity, ecogeography, agronomy, and molecular genetics was combined to obtain a more complete overview of the potential role of PPDH2 in environmental adaptation in barley. Results The dominant PPDH2 allele is represented widely in spring barley cultivars but is found only occasionally in modern winter cultivars that have strong vernalization requirements. However, old landraces from the Iberian Peninsula, which also have a vernalization requirement, possess this allele at a much higher frequency than modern winter barley cultivars. Under field conditions in which the vernalization requirement of winter cultivars is not satisfied, the dominant PPDH2 allele promotes flowering, even under increasing photoperiods above 12 h. This hypothesis was supported by expression analysis of vernalization-responsive genotypes. When the dominant allele of PPDH2 was expressed, this was associated with enhanced levels of VRNH1 and VRNH3 expression. Expression of these two genes is needed for the induction of flowering. Therefore, both in the field and under controlled conditions, PPDH2 has an effect of promotion of flowering. Conclusions The dominant, ancestral, allele of PPDH2 is prevalent in southern European barley germplasm. The presence of the dominant allele is associated with early expression of VRNH1 and early flowering. We propose that PPDH2 promotes flowering of winter cultivars under all non-inductive conditions, i.e. under short days or long days in plants that have not satisfied their vernalization requirement. This mechanism is indicated to be a component of an adaptation syndrome of barley to Mediterranean conditions. | Descripción: | 39 Pags., 3 Tabls., 4 Figs. The definitive version is available at: http://www.biomedcentral.com/bmcplantbiol | Versión del editor: | http://dx.doi.org/http://dx.doi.org/10.1186/1471-2229-11-164 | URI: | http://hdl.handle.net/10261/42618 | DOI: | 10.1186/1471-2229-11-164 | ISSN: | 1471-2229 | E-ISSN: | 1471-2229 |
Aparece en las colecciones: | (EEAD) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
CasasA_BMC Plant Biol_2011.pdf | 714,83 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
PubMed Central
Citations
26
checked on 28-mar-2024
SCOPUSTM
Citations
45
checked on 28-mar-2024
WEB OF SCIENCETM
Citations
43
checked on 23-feb-2024
Page view(s)
632
checked on 29-mar-2024
Download(s)
245
checked on 29-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
Artículos relacionados:
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.