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dc.contributor.author
Windauer, Liliana Beatriz
dc.contributor.author
Ploschuk, Edmundo Leonardo
dc.contributor.author
Benech-arnold, Roberto Luis
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dc.date.available
2016-02-11T19:49:08Z
dc.date.issued
2013-05
dc.identifier.citation
Windauer, Liliana Beatriz; Ploschuk, Edmundo Leonardo; Benech-arnold, Roberto Luis; The growth rate modulates time to first bud appearance in Physaria mendocina; Elsevier; Industrial Crops and Products; 49; 5-2013; 188-195
dc.identifier.issn
0926-6690
dc.identifier.uri
http://hdl.handle.net/11336/4149
dc.description.abstract
Physaria mendocina is under domestication because its seeds contain significant amounts of hydroxy fatty acids for several industrial uses, but displays a facultative biennial behavior which may represent a drawback in terms of production. Previous work revealed that the time to flower induction in this species is insensitive to temperature, photoperiod and vernalization, but suggested that this length of time could be determined by radiation, water and nutrients and/or the acquisition of a minimum growth rate. We aimed to determine whether the attainment of a threshold plant growth rate (GRt) triggers the initiation of the flowering phase in P. mendocina. Nutrient, water and radiation availability were manipulated to modify the timing of acquisition of that rate, expecting a concomitant modification of the time to flowering. We also explored the possibility that the stimulus is mediated by an accumulation of active gibberellins (GAs). Linear regressions were fitted between plant dry weight and time, and slopes of the relationships were considered as the growth rates. Radiation, water and nutrients constraints increased the duration of the phase between emergence and, concomitantly, first bud appearance (FBA). However, plants from all treatments reached FBA, after acquiring a growth rate of around 0.01 g d−1 pl −1 (GRt).When exogenous GAs was applied under limiting radiation, plants reached FBA despite the fact that they never acquired a GRt; conversely, when GAs biosynthesis was inhibited under high irradiances, the plants required more days to reach FBA than controls, despite the fact that they acquired a GRt. The information obtained allow us to conclude that the time to FBA, which is the first visible manifestation of floral induction in this system, is modulated by factors controlling growth mediated by an accumulation of (GAs) and suggest that the acquisition of GRt is the internal feature that triggers floral induction. This knowledge offers a frame within which cropping systems could be designed in order to avoid or not a biennial behavior.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Physaria Mendocina
dc.subject
Development
dc.subject
Floral Induction
dc.subject
Growth Rate
dc.subject.classification
Agricultura
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dc.subject.classification
Agricultura, Silvicultura y Pesca
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
The growth rate modulates time to first bud appearance in Physaria mendocina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
49
dc.journal.pagination
188-195
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Windauer, Liliana Beatriz. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales; Argentina
dc.description.fil
Fil: Ploschuk, Edmundo Leonardo. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales; Argentina
dc.description.fil
Fil: Benech-arnold, Roberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales; Argentina
dc.journal.title
Industrial Crops and Products
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0926669013002276
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/issn/0926-6690
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.indcrop.2013.04.049
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