Morphogenesis on age categories of tillers in marandu palisadegrass.

Knowledge regarding morphogenetic characteristics has contributed to the understanding of plant responses to variations in climatic conditions and management practices. However, the original framework has been developed for temperate grass species, and indicates no ontogenetic effect on the expressi...

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Authors: PAIVA, A. J., SILVA, S. C. da, PEREIRA, L. E. T., CAMINHA, F. O., PEREIRA, P. de M., GUARDA, V. D. A.
Format: article
Status:Published version
Publication Date:2011
Country:Brasil
Institution:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
Repository:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Language:English
OAI Identifier:oai:www.alice.cnptia.embrapa.br:doc/917883
Online Access:http://www.alice.cnptia.embrapa.br/alice/handle/doc/917883
Access Level:Open access
Keyword:Tiller age
Morphogenetic characteristics
Brachiaria brizantha
Nitrogênio
Urochloa brizantha
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oai_identifier_str oai:www.alice.cnptia.embrapa.br:doc/917883
network_acronym_str BR
network_name_str Brasil
repository_id_str
spelling Morphogenesis on age categories of tillers in marandu palisadegrass.Tiller ageMorphogenetic characteristicsBrachiaria brizanthaNitrogênioUrochloa brizanthaKnowledge regarding morphogenetic characteristics has contributed to the understanding of plant responses to variations in climatic conditions and management practices. However, the original framework has been developed for temperate grass species, and indicates no ontogenetic effect on the expression of morphogenetic traits. Similar information for tropical grass species is scarce, but not less important. This experiment aimed at evaluating the influence of tiller age on the morphogenetic characteristics of continuously stocked marandu palisadegrass swards maintained at 30 cm and fertilized with nitrogen (N). Treatments corresponded to three nitrogen application rates (150, 300 and 450 kg ha?¹ of N) plus the control (no fertilization) and were assigned to experimental units (1,200 m2 paddocks) according to a complete randomized block design, with four replications. The following response variables were measured during autumn/winter (Jun. to Jul. 2007) and summer (Feb. to Mar. 2008): leaf appearance rate (LAR), leaf elongation rate (LER) and the age profile of the tiller population. In general, LAR and LER were higher on young (< 2 months old) relative to mature (2 to 4 months old) and old (> 4 months old) tillers during both autumn/winter and summer. During autumn/winter swards were mainly comprised of old tillers (> 4 months old), the opposite happening during summer, when they were mainly comprised of young tillers. Overall, there was no N effect within tiller age categories. Tiller age was an important factor interfering with the morphogenetic responses of marandu palisadegrass, indicating that there is an ontogenetic effect on plant morphogenesis that should be considered further in future studies of this nature.ADENILSON JOSÉ PAIVA, ESALQ; SILA CARNEIRO DA SILVA, ESALQ; LILIAN ELGALISE TECHIO PEREIRA, ESALQ; FÁBIO OLEGÁRIO CAMINHA, ESALQ; PRISCILA DE MESQUITA PEREIRA, ESALQ; VITOR DEL ALAMO GUARDA, CNPASA.2012-03-07T11:11:11Z2012-03-07T11:11:11Z2012-03-07T11:11:11Z2012-03-07T11:11:11Z2012-03-0720112012-11-08T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleScientia Agricola, Piracicaba, v. 68, n. 6, p. 626-631, nov./dez. 2011.http://www.alice.cnptia.embrapa.br/alice/handle/doc/917883enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAPAIVA, A. J.SILVA, S. C. daPEREIRA, L. E. T.CAMINHA, F. O.PEREIRA, P. de M.GUARDA, V. D. A.2017-08-16T00:19:56Zoai:www.alice.cnptia.embrapa.br:doc/917883Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T00:19:56Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Morphogenesis on age categories of tillers in marandu palisadegrass.
title Morphogenesis on age categories of tillers in marandu palisadegrass.
spellingShingle Morphogenesis on age categories of tillers in marandu palisadegrass.
PAIVA, A. J.
Tiller age
Morphogenetic characteristics
Brachiaria brizantha
Nitrogênio
Urochloa brizantha
title_short Morphogenesis on age categories of tillers in marandu palisadegrass.
title_full Morphogenesis on age categories of tillers in marandu palisadegrass.
title_fullStr Morphogenesis on age categories of tillers in marandu palisadegrass.
title_full_unstemmed Morphogenesis on age categories of tillers in marandu palisadegrass.
title_sort Morphogenesis on age categories of tillers in marandu palisadegrass.
dc.creator.none.fl_str_mv PAIVA, A. J.
SILVA, S. C. da
PEREIRA, L. E. T.
CAMINHA, F. O.
PEREIRA, P. de M.
GUARDA, V. D. A.
author PAIVA, A. J.
author_facet PAIVA, A. J.
SILVA, S. C. da
PEREIRA, L. E. T.
CAMINHA, F. O.
PEREIRA, P. de M.
GUARDA, V. D. A.
author_role author
author2 SILVA, S. C. da
PEREIRA, L. E. T.
CAMINHA, F. O.
PEREIRA, P. de M.
GUARDA, V. D. A.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv ADENILSON JOSÉ PAIVA, ESALQ; SILA CARNEIRO DA SILVA, ESALQ; LILIAN ELGALISE TECHIO PEREIRA, ESALQ; FÁBIO OLEGÁRIO CAMINHA, ESALQ; PRISCILA DE MESQUITA PEREIRA, ESALQ; VITOR DEL ALAMO GUARDA, CNPASA.
dc.subject.por.fl_str_mv Tiller age
Morphogenetic characteristics
Brachiaria brizantha
Nitrogênio
Urochloa brizantha
topic Tiller age
Morphogenetic characteristics
Brachiaria brizantha
Nitrogênio
Urochloa brizantha
description Knowledge regarding morphogenetic characteristics has contributed to the understanding of plant responses to variations in climatic conditions and management practices. However, the original framework has been developed for temperate grass species, and indicates no ontogenetic effect on the expression of morphogenetic traits. Similar information for tropical grass species is scarce, but not less important. This experiment aimed at evaluating the influence of tiller age on the morphogenetic characteristics of continuously stocked marandu palisadegrass swards maintained at 30 cm and fertilized with nitrogen (N). Treatments corresponded to three nitrogen application rates (150, 300 and 450 kg ha?¹ of N) plus the control (no fertilization) and were assigned to experimental units (1,200 m2 paddocks) according to a complete randomized block design, with four replications. The following response variables were measured during autumn/winter (Jun. to Jul. 2007) and summer (Feb. to Mar. 2008): leaf appearance rate (LAR), leaf elongation rate (LER) and the age profile of the tiller population. In general, LAR and LER were higher on young (< 2 months old) relative to mature (2 to 4 months old) and old (> 4 months old) tillers during both autumn/winter and summer. During autumn/winter swards were mainly comprised of old tillers (> 4 months old), the opposite happening during summer, when they were mainly comprised of young tillers. Overall, there was no N effect within tiller age categories. Tiller age was an important factor interfering with the morphogenetic responses of marandu palisadegrass, indicating that there is an ontogenetic effect on plant morphogenesis that should be considered further in future studies of this nature.
publishDate 2011
dc.date.none.fl_str_mv 2011
2012-03-07T11:11:11Z
2012-03-07T11:11:11Z
2012-03-07T11:11:11Z
2012-03-07T11:11:11Z
2012-03-07
2012-11-08T11:11:11Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Scientia Agricola, Piracicaba, v. 68, n. 6, p. 626-631, nov./dez. 2011.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/917883
identifier_str_mv Scientia Agricola, Piracicaba, v. 68, n. 6, p. 626-631, nov./dez. 2011.
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/917883
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
_version_ 1853675356207185920
score 15,223283

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