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| Registros recuperados : 13 | |
| 7. |  | MOUTINHO, P.; NEPSTAD, D. C.; DIAS-FILHO, M.; RAY, D.; SOLORZANO, L.; CARDINOT, G.; TOHVER, I. Drought effects on net primary productivity and its allocation in an east-central Amazon forest: results from a throughfall exclusion experiment. In: CONFERÊNCIA CIENTÍFICA INTERNACIONAL DO LBA, 2., 2002, Manaus. Resumos. Manaus: LBA, 2002. Não paginado.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 12. | | DAVIDSON, E.; LEFEBVRE, P. A.; BRANDO, P. M.; RAY, D. M.; TRUMBORE, S. E.; SOLORZANO, L. A.; FERREIRA, J. N.; BUSTAMANTE, M. M. da C.; NEPSTAD, D. C. Carbon inputs and water uptake in deep soils of an Eastern Amazon forest. Forest Science, v. 57, n. 1, p. 51-58, Feb. 2011.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 13. | | NEPSTAD, D. C.; MOUTINHO, P.; DIAS-FILHO, M. B.; DAVIDSON, E.; CARDINOT, G.; MARKEWITZ, D.; FIGUEIREDO, R.; VIANNA, N.; CHAMBERD, J.; RAY, D.; GUERREIROS, J. B.; LEFEBVRE, P.; STERNBERG, L.; MOREIRA, M.; BARROS, L.; ISHIDA, F. Y.; TOHLVER, I.; BELK, E.; KALIF, K.; SCHWALBE, K. The effects of partial throughfall exclusion on canopy processes, aboveground production, and biogeochemistry of an Amazon forest. Journal of Geophysical Research, v. 107, n. D20, 2002.| Biblioteca(s): Embrapa Amazônia Oriental. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pantanal. Para informações adicionais entre em contato com cpap.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
24/08/2005 |
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Data da última atualização: |
10/03/2017 |
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Autoria: |
JORGE; M. H. A.; RAY, D. T. |
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Afiliação: |
Embrapa Pantanal (Corumbá, MS); Department of Plant Sciences, The University of Arizona (Tucson, USA). |
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Título: |
Germination characterization of guayule seed by morphology, mass and, X-ray analysis. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Industrial Crops and Products, v. 22, p. 59-63, 2005. |
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Idioma: |
Inglês |
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Conteúdo: |
Guayule is a shrub native to northcentral Mexico and southwestern Texas and is economically important because it produces non-allergenic latex. Seed quality is an important factor in guayule stand establishment and found to vary greatly among seed lots. We hypothesized that this variation was due to the presence or absence of internal structures (e. g., embryo and endosperm) within the seed. The objective of this study was to characterize seed lots as to seed size, color and weight, and then analyze the relationship between X-ray image pattern of each and germination percentage. X-ray was used to discrimante between filled, partially filled, and undilled seed, and thus, the relationship between internal structures and seed viability. Two seed sizeds, 1.80 and 1.57 mm, of breeding line 11591 were separated into four color grades (bright-black, opaque-black, gray and yellow). Seeds were weighed and each category X-rayed. Germination tests were then performed. Results showed that yellow and bright-black seeds tended to be lighter in weight than gray and opaque-black seeds. It was possible to separate color grades by weitght. In addition, germination percentage was higher germination percentage tha partially filled and unfilled seeds. Data from the X-ray image patterns and germination tests strongly suggest that the presence of internal structures plays a major role in germination of guayule seed. We conclude that X-ray could be used in seed lots to improve the quality of guayule seed germination by separating the filled seeds from the unfilled or partially filled seeds. MenosGuayule is a shrub native to northcentral Mexico and southwestern Texas and is economically important because it produces non-allergenic latex. Seed quality is an important factor in guayule stand establishment and found to vary greatly among seed lots. We hypothesized that this variation was due to the presence or absence of internal structures (e. g., embryo and endosperm) within the seed. The objective of this study was to characterize seed lots as to seed size, color and weight, and then analyze the relationship between X-ray image pattern of each and germination percentage. X-ray was used to discrimante between filled, partially filled, and undilled seed, and thus, the relationship between internal structures and seed viability. Two seed sizeds, 1.80 and 1.57 mm, of breeding line 11591 were separated into four color grades (bright-black, opaque-black, gray and yellow). Seeds were weighed and each category X-rayed. Germination tests were then performed. Results showed that yellow and bright-black seeds tended to be lighter in weight than gray and opaque-black seeds. It was possible to separate color grades by weitght. In addition, germination percentage was higher germination percentage tha partially filled and unfilled seeds. Data from the X-ray image patterns and germination tests strongly suggest that the presence of internal structures plays a major role in germination of guayule seed. We conclude that X-ray could be used in seed lots to improve the quality of guayul... Mostrar Tudo |
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Palavras-Chave: |
Morfologia; Seed; Sementes; X-ray. |
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Thesagro: |
Germinação; Radiografia. |
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Thesaurus NAL: |
germination; guayule. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02203naa a2200241 a 4500
001 1786858
005 2017-03-10
008 2005 bl --- 0-- u #d
100 1 $aJORGE
245 $aGermination characterization of guayule seed by morphology, mass and, X-ray analysis.
260 $c2005
520 $aGuayule is a shrub native to northcentral Mexico and southwestern Texas and is economically important because it produces non-allergenic latex. Seed quality is an important factor in guayule stand establishment and found to vary greatly among seed lots. We hypothesized that this variation was due to the presence or absence of internal structures (e. g., embryo and endosperm) within the seed. The objective of this study was to characterize seed lots as to seed size, color and weight, and then analyze the relationship between X-ray image pattern of each and germination percentage. X-ray was used to discrimante between filled, partially filled, and undilled seed, and thus, the relationship between internal structures and seed viability. Two seed sizeds, 1.80 and 1.57 mm, of breeding line 11591 were separated into four color grades (bright-black, opaque-black, gray and yellow). Seeds were weighed and each category X-rayed. Germination tests were then performed. Results showed that yellow and bright-black seeds tended to be lighter in weight than gray and opaque-black seeds. It was possible to separate color grades by weitght. In addition, germination percentage was higher germination percentage tha partially filled and unfilled seeds. Data from the X-ray image patterns and germination tests strongly suggest that the presence of internal structures plays a major role in germination of guayule seed. We conclude that X-ray could be used in seed lots to improve the quality of guayule seed germination by separating the filled seeds from the unfilled or partially filled seeds.
650 $agermination
650 $aguayule
650 $aGerminação
650 $aRadiografia
653 $aMorfologia
653 $aSeed
653 $aSementes
653 $aX-ray
700 1 $aM. H. A.
700 1 $aRAY, D. T.
773 $tIndustrial Crops and Products$gv. 22, p. 59-63, 2005.
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