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dc.contributor.author
Ceccato, Diana
dc.contributor.author
Bertero, Hector Daniel
dc.contributor.author
Batlla, Diego
dc.contributor.author
Galati, Beatriz Gloria
dc.date.available
2018-05-04T18:50:00Z
dc.date.issued
2015-09
dc.identifier.citation
Ceccato, Diana; Bertero, Hector Daniel; Batlla, Diego; Galati, Beatriz Gloria; Structural aspects of dormancy in quinoa (Chenopodium quinoa): Importance and possible action mechanisms of the seed coats; Cambridge University Press; Seed Science Research; 25; 3; 9-2015; 267-275
dc.identifier.issn
0960-2585
dc.identifier.uri
http://hdl.handle.net/11336/44200
dc.description.abstract
Two possible sources of resistance to pre-harvest sprouting were evaluated in quinoa. They showed dormancy at harvest and significant variations in dormancy level in response to environmental conditions experienced during seed development. The aims of this work were to evaluate the importance of seed coats in the regulation of dormancy in this species, to investigate possible mechanisms of action and to assess association of seed coat properties with changes in dormancy level caused by the environment. Accessions Chadmo and 2-Want were grown under field conditions on different sowing dates during 2 years. Seed coats were manipulated and seed germination was evaluated at different temperatures. Seed coat perforation before incubation led to faster dormancy loss in both accessions. This effect decreased with delayed sowing date, and seeds expressed a level of dormancy not imposed by coats. This suggests the presence of embryo dormancy in the genus Chenopodium. Seeds of the accession 2-Want had a significantly thinner seed coat at later sowing dates, associated with a decreasing coat-imposed dormancy, but this pattern was not detected in Chadmo. The seed coat acts as a barrier to the release of endogenous abscisic acid (ABA) in quinoa, suggested by the increase in germination and a higher amount of ABA leached from perforated seeds. ABA is able to leach from seeds with an intact seed coat, suggesting that differences in seed coat thickness may allow the leakage of different amounts of ABA. This mechanism may contribute to the observed differences in dormancy level, either between sowing dates or between accessions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Cambridge University Press
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Chenopodium Quinoa
dc.subject
Coat-Imposed Dormancy
dc.subject
Embryo-Imposed Dormancy,
dc.subject
Pre-Harvest Sprouting
dc.subject.classification
Otras Ciencias Biológicas
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Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Structural aspects of dormancy in quinoa (Chenopodium quinoa): Importance and possible action mechanisms of the seed coats
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-27T18:56:47Z
dc.identifier.eissn
1475-2735
dc.journal.volume
25
dc.journal.number
3
dc.journal.pagination
267-275
dc.journal.pais
Reino Unido
dc.journal.ciudad
Cambridge
dc.description.fil
Fil: Ceccato, Diana. Instituto Nacional de Tecnología Agropecuaria; Argentina
dc.description.fil
Fil: Bertero, Hector Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
dc.description.fil
Fil: Batlla, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
dc.description.fil
Fil: Galati, Beatriz Gloria. Universidad de Buenos Aires. Facultad de Agronomía; Argentina
dc.journal.title
Seed Science Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1017/S096025851500015X
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/seed-science-research/article/structural-aspects-of-dormancy-in-quinoa-chenopodium-quinoa-importance-and-possible-action-mechanisms-of-the-seed-coat/5AF8E238EAD187329255B60AFF296A4F
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