Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley

The present study was designed to analyse the effect of the length of exposure to a long photoperiod imposed c. 3 weeks after sowing in spring wheat (cv. UQ189) and barley (cv. Arapiles) to (i) establish whether the response to the number of cycles of exposure is quantitative or qualitative, (ii) de...

ver descrição completa

Detalhes bibliográficos
Autores: Miralles, D. J., Slafer, Gustavo A., Richards, R. A., Rawson, H. M.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2003
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/30336
Acesso em linha:https://doi.org/10.1017%2FS0021859603003484
http://hdl.handle.net/10459.1/30336
Access Level:acceso abierto
Palavra-chave:Blat -- Conreu
Ordi -- Conreu
Fisiologia vegetal
id ES_72f97adeb6d5ca9f2fb91cf22ddd9463
oai_identifier_str oai:recercat.cat:10459.1/30336
network_acronym_str ES
network_name_str España
repository_id_str
spelling Quantitative developmental response to the length of exposure to long photoperiod in wheat and barleyMiralles, D. J.Slafer, Gustavo A.Richards, R. A.Rawson, H. M.Blat -- ConreuOrdi -- ConreuFisiologia vegetalThe present study was designed to analyse the effect of the length of exposure to a long photoperiod imposed c. 3 weeks after sowing in spring wheat (cv. UQ189) and barley (cv. Arapiles) to (i) establish whether the response to the number of cycles of exposure is quantitative or qualitative, (ii) determine the existence of a commitment to particular stages well before the stage has been observable, and (iii) study the interrelationships between the effects on final leaf number and phyllochron when the stimulus is provided several days after seedling emergence. Both wheat and barley seemed to respond quantitatively to the number of long-day cycles they were exposed to. However, wheat showed a requirement of approximately 4 long-day cycles to be able to produce a significant response in time to heading. The barley cultivar used in the study was responsive to the minimum length of exposure. The response to extended photoperiod cycles during the stem elongation phase was due to the ‘ memory’ photoperiod effects being related, in the case of wheat, to the fact that the pre-terminal spikelet appearance phase saturated its photoperiod response well before that stage was reached. Therefore, the commitment to the terminal spikelet appearance in wheat may be reached well before this stage could be recognized. As the response in duration to heading exceeded that of the final leaf number, and the stem elongation phase responded to memory effects of photoperiod, the phyllochron of both cereals was responsive to the treatments accelerating the average phyllochron when exposed to longer periods of long days. The response in average phyllochron was due to a switch from bi-linear to linear models of leaf number v. time when the conditions were increasingly inductive, with the phyllochron of the initial (6–8) leaves being similar for all treatments (within each species), and from then on increased.Cambridge University Press2003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.1017%2FS0021859603003484http://hdl.handle.net/10459.1/30336reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a https://doi.org/10.1017%2FS0021859603003484Journal of Agricultural Science, 2003, vol. 141, núm. 2, p. 159-167(c) Cambridge University Press, 2003info:eu-repo/semantics/openAccessoai:recercat.cat:10459.1/303362026-05-29T05:05:01Z
dc.title.none.fl_str_mv Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley
title Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley
spellingShingle Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley
Miralles, D. J.
Blat -- Conreu
Ordi -- Conreu
Fisiologia vegetal
title_short Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley
title_full Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley
title_fullStr Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley
title_full_unstemmed Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley
title_sort Quantitative developmental response to the length of exposure to long photoperiod in wheat and barley
dc.creator.none.fl_str_mv Miralles, D. J.
Slafer, Gustavo A.
Richards, R. A.
Rawson, H. M.
author Miralles, D. J.
author_facet Miralles, D. J.
Slafer, Gustavo A.
Richards, R. A.
Rawson, H. M.
author_role author
author2 Slafer, Gustavo A.
Richards, R. A.
Rawson, H. M.
author2_role author
author
author
dc.subject.none.fl_str_mv Blat -- Conreu
Ordi -- Conreu
Fisiologia vegetal
topic Blat -- Conreu
Ordi -- Conreu
Fisiologia vegetal
description The present study was designed to analyse the effect of the length of exposure to a long photoperiod imposed c. 3 weeks after sowing in spring wheat (cv. UQ189) and barley (cv. Arapiles) to (i) establish whether the response to the number of cycles of exposure is quantitative or qualitative, (ii) determine the existence of a commitment to particular stages well before the stage has been observable, and (iii) study the interrelationships between the effects on final leaf number and phyllochron when the stimulus is provided several days after seedling emergence. Both wheat and barley seemed to respond quantitatively to the number of long-day cycles they were exposed to. However, wheat showed a requirement of approximately 4 long-day cycles to be able to produce a significant response in time to heading. The barley cultivar used in the study was responsive to the minimum length of exposure. The response to extended photoperiod cycles during the stem elongation phase was due to the ‘ memory’ photoperiod effects being related, in the case of wheat, to the fact that the pre-terminal spikelet appearance phase saturated its photoperiod response well before that stage was reached. Therefore, the commitment to the terminal spikelet appearance in wheat may be reached well before this stage could be recognized. As the response in duration to heading exceeded that of the final leaf number, and the stem elongation phase responded to memory effects of photoperiod, the phyllochron of both cereals was responsive to the treatments accelerating the average phyllochron when exposed to longer periods of long days. The response in average phyllochron was due to a switch from bi-linear to linear models of leaf number v. time when the conditions were increasingly inductive, with the phyllochron of the initial (6–8) leaves being similar for all treatments (within each species), and from then on increased.
publishDate 2003
dc.date.none.fl_str_mv 2003
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1017%2FS0021859603003484
http://hdl.handle.net/10459.1/30336
url https://doi.org/10.1017%2FS0021859603003484
http://hdl.handle.net/10459.1/30336
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a https://doi.org/10.1017%2FS0021859603003484
Journal of Agricultural Science, 2003, vol. 141, núm. 2, p. 159-167
dc.rights.none.fl_str_mv (c) Cambridge University Press, 2003
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Cambridge University Press, 2003
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Cambridge University Press
publisher.none.fl_str_mv Cambridge University Press
dc.source.none.fl_str_mv reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869410775230054400
score 15.81155

Registos relacionados