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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Semiárido. |
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Data corrente: |
01/09/1993 |
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Data da última atualização: |
05/10/2005 |
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Autoria: |
VIEIRA, E. H. N. |
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Afiliação: |
Embrapa Arroz e Feijão. |
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Título: |
Relationship between seed density and quality of cowpea [Vigna unguiculata (L.) Walp] seeds. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Starkville: Mississippi State University, 1991. |
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Páginas: |
86 p. |
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Idioma: |
Inglês |
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Notas: |
Tese Doutorado. |
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Conteúdo: |
Field and laboratory experiments were conducted to evaluate the relationship between seed specific gravity, and/or seed density, to the phydiological quality, storability and seedling performance of cowpea seeds. Two methods of seed separation were used: a) separation using aqueous sucrose and b) using a table model fractionating aspirator. Seeds of different specific gravity separated by sucrose solution were compares using a standard germination test at 20-30oC and accelerated aging tests at temperatures of 40oC, 42oC, and 45oC for 48 and 72 hours. Germination responses indicated that low specific gravity seeds perform poorly when compared to high specific seeds and to the unseparated sample. However, seed vigor responses expressed by the accelerated tests results revealed significantly higher vigor for the unseparated sample than for any of the specific gravity classes, suggesting that the use of aqueous solutions for cowpea seed separation may have a detrimental effect on seed quality possibly due to water absorption during separation. Field emergence results in 1988 were not significantly different among specific gravity categories. In 1990, field emergence responses were similar to results obtained in the accelerated aging tests. The unseparated seeds were superior to the seeds which were separated using solutions. However, differences in yield in both 1988 and 1990 planting seasons were not related to seed specific gravity. The evaluation of the relationship between seed density expressed by 100 seed weight and storability of cowpea seeds was determined different density fractions obtained using a fractionating aspirator. Evaluations were conducted prior to storage and after 6, 9 and 12 months of open storage using the standard germination test, first count germination, accelerated aging test, and germination performance at low temperature. Vigor was also evaluated by comparing seedling elongation characteristics. No significant differents were observed in germination percentage for all categories prior to storage. However, tests conducted after each storage period revealed significantly higher germination for the high density seeds as well as for the unseparated control. MenosField and laboratory experiments were conducted to evaluate the relationship between seed specific gravity, and/or seed density, to the phydiological quality, storability and seedling performance of cowpea seeds. Two methods of seed separation were used: a) separation using aqueous sucrose and b) using a table model fractionating aspirator. Seeds of different specific gravity separated by sucrose solution were compares using a standard germination test at 20-30oC and accelerated aging tests at temperatures of 40oC, 42oC, and 45oC for 48 and 72 hours. Germination responses indicated that low specific gravity seeds perform poorly when compared to high specific seeds and to the unseparated sample. However, seed vigor responses expressed by the accelerated tests results revealed significantly higher vigor for the unseparated sample than for any of the specific gravity classes, suggesting that the use of aqueous solutions for cowpea seed separation may have a detrimental effect on seed quality possibly due to water absorption during separation. Field emergence results in 1988 were not significantly different among specific gravity categories. In 1990, field emergence responses were similar to results obtained in the accelerated aging tests. The unseparated seeds were superior to the seeds which were separated using solutions. However, differences in yield in both 1988 and 1990 planting seasons were not related to seed specific gravity. The evaluation of the relationship between s... Mostrar Tudo |
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Palavras-Chave: |
Caupi; Cowpea; Densidade; Quality; Relacao semente-planta; Relationship seed-plant. |
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Thesagro: |
Feijão de Corda; Qualidade; Semente; Vigna Unguiculata. |
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Thesaurus Nal: |
density; seeds. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02952nam a2200277 a 4500
001 1191354
005 2005-10-05
008 1991 bl uuuu m 00u1 u #d
100 1 $aVIEIRA, E. H. N.
245 $aRelationship between seed density and quality of cowpea [Vigna unguiculata (L.) Walp] seeds.
260 $aStarkville: Mississippi State University$c1991
300 $a86 p.
500 $aTese Doutorado.
520 $aField and laboratory experiments were conducted to evaluate the relationship between seed specific gravity, and/or seed density, to the phydiological quality, storability and seedling performance of cowpea seeds. Two methods of seed separation were used: a) separation using aqueous sucrose and b) using a table model fractionating aspirator. Seeds of different specific gravity separated by sucrose solution were compares using a standard germination test at 20-30oC and accelerated aging tests at temperatures of 40oC, 42oC, and 45oC for 48 and 72 hours. Germination responses indicated that low specific gravity seeds perform poorly when compared to high specific seeds and to the unseparated sample. However, seed vigor responses expressed by the accelerated tests results revealed significantly higher vigor for the unseparated sample than for any of the specific gravity classes, suggesting that the use of aqueous solutions for cowpea seed separation may have a detrimental effect on seed quality possibly due to water absorption during separation. Field emergence results in 1988 were not significantly different among specific gravity categories. In 1990, field emergence responses were similar to results obtained in the accelerated aging tests. The unseparated seeds were superior to the seeds which were separated using solutions. However, differences in yield in both 1988 and 1990 planting seasons were not related to seed specific gravity. The evaluation of the relationship between seed density expressed by 100 seed weight and storability of cowpea seeds was determined different density fractions obtained using a fractionating aspirator. Evaluations were conducted prior to storage and after 6, 9 and 12 months of open storage using the standard germination test, first count germination, accelerated aging test, and germination performance at low temperature. Vigor was also evaluated by comparing seedling elongation characteristics. No significant differents were observed in germination percentage for all categories prior to storage. However, tests conducted after each storage period revealed significantly higher germination for the high density seeds as well as for the unseparated control.
650 $adensity
650 $aseeds
650 $aFeijão de Corda
650 $aQualidade
650 $aSemente
650 $aVigna Unguiculata
653 $aCaupi
653 $aCowpea
653 $aDensidade
653 $aQuality
653 $aRelacao semente-planta
653 $aRelationship seed-plant
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Agroenergia. |
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Data corrente: |
02/02/2017 |
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Data da última atualização: |
22/02/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
FERREIRA, A. J.; OLIVEIRA, L. S.; ALVES, J. M. P.; THON, M.; DURHAM, A. M.; FAVARO, L. C. de L.; GRUBER, A.; ARAÚJO, W. L. |
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Afiliação: |
ALMIR J. FERREIRA; LILIANE S. OLIVEIRA; JOÃO M. P. ALVES; MICHAEL THON; ALAN M. DURHAM; LEIA CECILIA DE LIMA FAVARO, CNPAE; ARTHUR GRUBER; WELINGTON L. ARAÚJO. |
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Título: |
Genome analysis of E. nigrum and other filamentous fungi reveals molecular mechanisms related to endophytic/pathogenic lifestyles. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: X-MEETING; INTERNATIONAL CONFERENCE OF the AB3C, 2016, Belo Horizonte, MG. [Anais ... ]. Ribeirão Preto: AB3C, 2016. |
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Páginas: |
Não paginado. |
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Idioma: |
Inglês |
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Palavras-Chave: |
Análise genômica; Endofítico patogênico; Fungos filamentosos; Mecanismos moleculares. |
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Thesaurus NAL: |
Epicoccum nigrum. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/154641/1/Ferreira-et-al-X-Meeting-2016-identified1.pdf
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Marc: |
LEADER 00888nam a2200253 a 4500
001 2062608
005 2017-02-22
008 2016 bl uuuu u00u1 u #d
100 1 $aFERREIRA, A. J.
245 $aGenome analysis of E. nigrum and other filamentous fungi reveals molecular mechanisms related to endophytic/pathogenic lifestyles.$h[electronic resource]
260 $aIn: X-MEETING; INTERNATIONAL CONFERENCE OF the AB3C, 2016, Belo Horizonte, MG. [Anais ... ]. Ribeirão Preto: AB3C$c2016
300 $aNão paginado.
650 $aEpicoccum nigrum
653 $aAnálise genômica
653 $aEndofítico patogênico
653 $aFungos filamentosos
653 $aMecanismos moleculares
700 1 $aOLIVEIRA, L. S.
700 1 $aALVES, J. M. P.
700 1 $aTHON, M.
700 1 $aDURHAM, A. M.
700 1 $aFAVARO, L. C. de L.
700 1 $aGRUBER, A.
700 1 $aARAÚJO, W. L.
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Registro original: |
Embrapa Agroenergia (CNPAE) |
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