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Registro Completo |
Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
14/04/2011 |
Data da última atualização: |
14/04/2011 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
COUTO, M.; RASEIRA, M. C. B.; HERTER, F. G.; SILVA, J. B. |
Afiliação: |
Epagri |
Título: |
Influence of high temperatures at blooming time on pollen production and fruit set of peach CVS. maciel and granada. |
Ano de publicação: |
2010 |
Fonte/Imprenta: |
Acta Horticulturae, Leuven, v. 872, n. , p. 225-230, 2010. |
Idioma: |
Inglês |
Notas: |
ISSN, 05677572 |
Conteúdo: |
Regions under subtropical conditions commonly have temperature
fluctuations and at late winter time the occurrence of temperatures above 25°C
followed by less than 10°C is not rare. This is probably one of the causes for
production inconsistency over the years. Several field and laboratory tests were
conducted using two peach cultivars, ?Granada? and ?Maciel?, aiming to study the
effect of high temperature (≥25°C) at blooming period. In vitro pollen viability at
different temperatures was tested using a culture medium prepared with 1% agar
plus 10% sugar in distilled water. Pollen production per anther was also evaluated.
In field experiments, branches of these two cultivars were submitted to temperatures
2 to 8°C above field temperatures, using plastic bags or transparent bottles (pet) or
covering a whole plant with a portable greenhouse. The observed parameters were:
in vitro pollen viability, pollen production per anther (total and normal pollen
grains), length of pistils and fruit set. In laboratory tests, pollen germination was
lower at 32°C, than at 24 or 28°C for both cultivars. Higher temperatures did not
significantly influence length of pistils, probably because the field temperatures at
the tested years were already high. Total pollen production did not differ among
tested temperatures, however percentage of normal pollen grains was significantly
lower in ?Granada? at higher temperatures and did not differ for ?Maciel?. The same
was true for fruit set. The conclusion is that the negative effect of high temperatures
at blooming time is larger for ?Granada? than for ?Maciel?. MenosRegions under subtropical conditions commonly have temperature
fluctuations and at late winter time the occurrence of temperatures above 25°C
followed by less than 10°C is not rare. This is probably one of the causes for
production inconsistency over the years. Several field and laboratory tests were
conducted using two peach cultivars, ?Granada? and ?Maciel?, aiming to study the
effect of high temperature (≥25°C) at blooming period. In vitro pollen viability at
different temperatures was tested using a culture medium prepared with 1% agar
plus 10% sugar in distilled water. Pollen production per anther was also evaluated.
In field experiments, branches of these two cultivars were submitted to temperatures
2 to 8°C above field temperatures, using plastic bags or transparent bottles (pet) or
covering a whole plant with a portable greenhouse. The observed parameters were:
in vitro pollen viability, pollen production per anther (total and normal pollen
grains), length of pistils and fruit set. In laboratory tests, pollen germination was
lower at 32°C, than at 24 or 28°C for both cultivars. Higher temperatures did not
significantly influence length of pistils, probably because the field temperatures at
the tested years were already high. Total pollen production did not differ among
tested temperatures, however percentage of normal pollen grains was significantly
lower in ?Granada? at higher temperatures and did not differ for ?Maciel?. The same
was true for fruit set. The c... Mostrar Tudo |
Palavras-Chave: |
Adaptation; Pessego; Pollen viability; Prunus persica. |
Categoria do assunto: |
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Marc: |
LEADER 02160naa a2200181 a 4500 001 1075710 005 2011-04-14 008 2010 bl uuuu u00u1 u #d 100 1 $aEpagri 245 $aInfluence of high temperatures at blooming time on pollen production and fruit set of peach CVS. maciel and granada. 260 $c2010 500 $aISSN, 05677572 520 $aRegions under subtropical conditions commonly have temperature fluctuations and at late winter time the occurrence of temperatures above 25°C followed by less than 10°C is not rare. This is probably one of the causes for production inconsistency over the years. Several field and laboratory tests were conducted using two peach cultivars, ?Granada? and ?Maciel?, aiming to study the effect of high temperature (≥25°C) at blooming period. In vitro pollen viability at different temperatures was tested using a culture medium prepared with 1% agar plus 10% sugar in distilled water. Pollen production per anther was also evaluated. In field experiments, branches of these two cultivars were submitted to temperatures 2 to 8°C above field temperatures, using plastic bags or transparent bottles (pet) or covering a whole plant with a portable greenhouse. The observed parameters were: in vitro pollen viability, pollen production per anther (total and normal pollen grains), length of pistils and fruit set. In laboratory tests, pollen germination was lower at 32°C, than at 24 or 28°C for both cultivars. Higher temperatures did not significantly influence length of pistils, probably because the field temperatures at the tested years were already high. Total pollen production did not differ among tested temperatures, however percentage of normal pollen grains was significantly lower in ?Granada? at higher temperatures and did not differ for ?Maciel?. The same was true for fruit set. The conclusion is that the negative effect of high temperatures at blooming time is larger for ?Granada? than for ?Maciel?. 653 $aAdaptation 653 $aPessego 653 $aPollen viability 653 $aPrunus persica 773 $tActa Horticulturae, Leuven$gv. 872, n. , p. 225-230, 2010.
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Registro Completo
Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
06/11/2007 |
Data da última atualização: |
07/11/2007 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Circulação/Nível: |
-- - -- |
Autoria: |
BECK, A.A.H. |
Afiliação: |
Empasc |
Título: |
Helmintoses em bovinos de leite. |
Ano de publicação: |
1985 |
Fonte/Imprenta: |
In: BECK, A.A.H.; GARCIA, E.C.T.; BORGES, P.C.C. (Coord.). Manual de parasitoses dos animais. Florianopolis: Secretaria da Agricultura e do Abastecimento, 1985. p. 39-63. |
Idioma: |
Português |
Conteúdo: |
Relata-se os estudos epidemiologicos das hemintoses realizados em Santa Catarina, e apresenta-se sucintamente uma revisao de literatura salientando-se a importancia economica, etiologia, biologia, diagnostico, e tratamento. |
Palavras-Chave: |
Gado leiteiro; Helmintose; Parasito. |
Categoria do assunto: |
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Marc: |
LEADER 00730naa a2200157 a 4500 001 1061929 005 2007-11-07 008 1985 bl uuuu u00u1 u #d 100 1 $aBECK, A.A.H. 245 $aHelmintoses em bovinos de leite. 260 $c1985 520 $aRelata-se os estudos epidemiologicos das hemintoses realizados em Santa Catarina, e apresenta-se sucintamente uma revisao de literatura salientando-se a importancia economica, etiologia, biologia, diagnostico, e tratamento. 653 $aGado leiteiro 653 $aHelmintose 653 $aParasito 773 $tIn: BECK, A.A.H.; GARCIA, E.C.T.; BORGES, P.C.C. (Coord.). Manual de parasitoses dos animais. Florianopolis: Secretaria da Agricultura e do Abastecimento, 1985. p. 39-63.
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