| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Meio-Norte. |
|
Data corrente: |
15/04/1997 |
|
Data da última atualização: |
18/01/2012 |
|
Autoria: |
WARRAG, M. O. A.; HALL, A. E. |
|
Título: |
Reproductive response of cowpea (Vigna unguiculata (L.) Walp.) to heat stress. II. Responses to night air temperature. |
|
Ano de publicação: |
1984 |
|
Fonte/Imprenta: |
Field Crops Research, v. 8, n. 112, p. 17-33, 1984. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The influence of high night temperature and drought on the abscission of reproductive organs were studied with cowpea (Vigna unguiculata (L.) Walp. cv. 'California Blackeye n. 5') in controlled environments. Floral development of cowpeas at 33/22oC day/night temperature appeared to be normal. However, at 33/30oC day/night temperature all flowers abscissed within 48 h after anthesis due to male sterility resulting from abnormar pollen development and anther indehiscence. By moving plants between growth chambers with high and moderate night temperatures, it was demonstrated that the stage of floral development most sensitive to high night temperature occurred 5-7 days before anthesis. This corresponds with the stage just after the release of the tetrads from the microscope mother cell sac. Plants subjected to drought were smaller, and at the lower night temperature drought resulted in less seed production but this was due to fewer reproductive nodes and the percent abscission of reproductive organs was not influenced by drought. Observations were made on the effects of high temperatures on reproductive growth of six cowpea strains grown under field conditions. Complete abscission of flowers was observed during hot weather under field conditions followed by pod set approximately 6 days after decreases innight temperature. These data are consistent with the observations on cowpeas in growth chambers which demonstrated that high night temperatures can cause male sterility and complete abscission of flowers. MenosThe influence of high night temperature and drought on the abscission of reproductive organs were studied with cowpea (Vigna unguiculata (L.) Walp. cv. 'California Blackeye n. 5') in controlled environments. Floral development of cowpeas at 33/22oC day/night temperature appeared to be normal. However, at 33/30oC day/night temperature all flowers abscissed within 48 h after anthesis due to male sterility resulting from abnormar pollen development and anther indehiscence. By moving plants between growth chambers with high and moderate night temperatures, it was demonstrated that the stage of floral development most sensitive to high night temperature occurred 5-7 days before anthesis. This corresponds with the stage just after the release of the tetrads from the microscope mother cell sac. Plants subjected to drought were smaller, and at the lower night temperature drought resulted in less seed production but this was due to fewer reproductive nodes and the percent abscission of reproductive organs was not influenced by drought. Observations were made on the effects of high temperatures on reproductive growth of six cowpea strains grown under field conditions. Complete abscission of flowers was observed during hot weather under field conditions followed by pod set approximately 6 days after decreases innight temperature. These data are consistent with the observations on cowpeas in growth chambers which demonstrated that high night temperatures can cause male sterility and c... Mostrar Tudo |
|
Palavras-Chave: |
Caupi; Cowpea; Estress por calor. |
|
Thesagro: |
Stress; Vigna Unguiculata. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02089naa a2200193 a 4500
001 1054807
005 2012-01-18
008 1984 bl --- 0-- u #d
100 1 $aWARRAG, M. O. A.
245 $aReproductive response of cowpea (Vigna unguiculata (L.) Walp.) to heat stress. II. Responses to night air temperature.
260 $c1984
520 $aThe influence of high night temperature and drought on the abscission of reproductive organs were studied with cowpea (Vigna unguiculata (L.) Walp. cv. 'California Blackeye n. 5') in controlled environments. Floral development of cowpeas at 33/22oC day/night temperature appeared to be normal. However, at 33/30oC day/night temperature all flowers abscissed within 48 h after anthesis due to male sterility resulting from abnormar pollen development and anther indehiscence. By moving plants between growth chambers with high and moderate night temperatures, it was demonstrated that the stage of floral development most sensitive to high night temperature occurred 5-7 days before anthesis. This corresponds with the stage just after the release of the tetrads from the microscope mother cell sac. Plants subjected to drought were smaller, and at the lower night temperature drought resulted in less seed production but this was due to fewer reproductive nodes and the percent abscission of reproductive organs was not influenced by drought. Observations were made on the effects of high temperatures on reproductive growth of six cowpea strains grown under field conditions. Complete abscission of flowers was observed during hot weather under field conditions followed by pod set approximately 6 days after decreases innight temperature. These data are consistent with the observations on cowpeas in growth chambers which demonstrated that high night temperatures can cause male sterility and complete abscission of flowers.
650 $aStress
650 $aVigna Unguiculata
653 $aCaupi
653 $aCowpea
653 $aEstress por calor
700 1 $aHALL, A. E.
773 $tField Crops Research$gv. 8, n. 112, p. 17-33, 1984.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio-Norte (CPAMN) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 2 | |
| Registros recuperados : 2 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
