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Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
29/03/2006 |
Data da última atualização: |
09/10/2008 |
Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
Autoria: |
KLUTHCOUSKI, J.; AIDAR, H.; THUNG, M.; OLIVEIRA, F. R. de A.; SOARES, D. M. |
Título: |
Efeitos da aplicação antecipada do nitrogênio em feijoeiro comum no sistema plantio direto, sob irrigação por aspersão. |
Ano de publicação: |
2005 |
Fonte/Imprenta: |
In: CONGRESSO NACIONAL DE PESQUISA DE FEIJÃO, 8., 2005, Goiânia. Anais... Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2005. |
Volume: |
v. 2. |
Páginas: |
p. 999-1002. |
Série: |
(Embrapa Arroz e Feijão. Documentos, 182). |
Idioma: |
Português |
Conteúdo: |
O presente trabalho teve como objetivo avaliar os efeitos da aplicação antecipada do nitrogênio sobre os feijoeiros, imediatamente antes da sua semeadura, em terras altas irrigadas por aspersão. |
Palavras-Chave: |
Aplicação; CONAFE. |
Thesagro: |
Feijão; Nitrogênio; Phaseolus Vulgaris; Semeadura. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01069naa a2200265 a 4500 001 1214037 005 2008-10-09 008 2005 bl uuuu u00u1 u #d 100 1 $aKLUTHCOUSKI, J. 245 $aEfeitos da aplicação antecipada do nitrogênio em feijoeiro comum no sistema plantio direto, sob irrigação por aspersão. 260 $c2005 300 $ap. 999-1002. v. 2. 490 $a(Embrapa Arroz e Feijão. Documentos, 182).$vv. 2. 520 $aO presente trabalho teve como objetivo avaliar os efeitos da aplicação antecipada do nitrogênio sobre os feijoeiros, imediatamente antes da sua semeadura, em terras altas irrigadas por aspersão. 650 $aFeijão 650 $aNitrogênio 650 $aPhaseolus Vulgaris 650 $aSemeadura 653 $aAplicação 653 $aCONAFE 700 1 $aAIDAR, H. 700 1 $aTHUNG, M. 700 1 $aOLIVEIRA, F. R. de A. 700 1 $aSOARES, D. M. 773 $tIn: CONGRESSO NACIONAL DE PESQUISA DE FEIJÃO, 8., 2005, Goiânia. Anais... Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2005.
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Embrapa Arroz e Feijão (CNPAF) |
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Registro Completo
Biblioteca(s): |
Embrapa Café. |
Data corrente: |
12/11/2019 |
Data da última atualização: |
12/11/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
COELHO, S. V. B.; ROSA, S. D. V. F. da; FANTAZZINI, T. B.; SILVA, L. C. |
Afiliação: |
Stefânia Vilas Boas Coelho, Universidade Federal de Lavras - UFLA; STTELA DELLYZETE VEIGA F DA ROSA, CNPCa; Tatiana Botelho Fantazzini, Universidade Federal de Lavras - UFLA; Luciano Coutinho Silva, Universidade Federal da Paraíba - UFPB. |
Título: |
Cryopreservation of Coffea canephora Pierre ex A. Froehner seeds: importance of drying rate and moisture content. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Australian Journal of Crop Science, v.13, n. 8, p. 1335-1342, 2019. |
Idioma: |
Inglês |
Conteúdo: |
Seeds of the Coffea canephora species are considered more recalcitrant than those of the Coffea arabica species. They tolerate partial dehydration and they cannot be stored in conventional seed banks at -18ºC because they are sensitive to freezing temperatures. Cryopreservation is a reliable method for storing seeds with these characteristics for long periods. However, preliminary studies are necessary to determine ideal storage conditions. The aim of this study was to investigate the ideal physical and physiological conditions for cryopreservation of Coffea canephora seeds to reduce seed mortality caused by the formation of intracellular ice crystals and to avoid cell damage caused by excessive desiccation. Seeds were subjected to rapid drying in silica gel and slow drying in saturated NaCl solution to moisture contents of 0.20, 0.25, and 0.28 g.g-¹ (dry basis), followed by direct immersion in liquid nitrogen for rapid freezing. Physiological and biochemical analyses were performed to evaluate seed quality before and after cryopreservation. Rapid drying of Coffea canephora seeds to values near 0.20 g.g-1 (db) does not cause reduction in physiological quality. Moisture content of 0.25 g.g-¹ brings about greater survival of Coffea canephora seeds after cryopreservation. Drying rate affects the physiological quality of cryopreserved Coffea canephora seeds, and rapid drying in silica gel is more favorable than slow drying in a saturated NaCl solution. The activity of the enzymes catalase, esterase, glutamic oxaloacetic transaminase, and polyphenol oxidase are indicators of seed quality for Coffea canephora seeds subjected to cryopreservation. MenosSeeds of the Coffea canephora species are considered more recalcitrant than those of the Coffea arabica species. They tolerate partial dehydration and they cannot be stored in conventional seed banks at -18ºC because they are sensitive to freezing temperatures. Cryopreservation is a reliable method for storing seeds with these characteristics for long periods. However, preliminary studies are necessary to determine ideal storage conditions. The aim of this study was to investigate the ideal physical and physiological conditions for cryopreservation of Coffea canephora seeds to reduce seed mortality caused by the formation of intracellular ice crystals and to avoid cell damage caused by excessive desiccation. Seeds were subjected to rapid drying in silica gel and slow drying in saturated NaCl solution to moisture contents of 0.20, 0.25, and 0.28 g.g-¹ (dry basis), followed by direct immersion in liquid nitrogen for rapid freezing. Physiological and biochemical analyses were performed to evaluate seed quality before and after cryopreservation. Rapid drying of Coffea canephora seeds to values near 0.20 g.g-1 (db) does not cause reduction in physiological quality. Moisture content of 0.25 g.g-¹ brings about greater survival of Coffea canephora seeds after cryopreservation. Drying rate affects the physiological quality of cryopreserved Coffea canephora seeds, and rapid drying in silica gel is more favorable than slow drying in a saturated NaCl solution. The activity of the enzyme... Mostrar Tudo |
Palavras-Chave: |
Antioxidant enzymes; Drying in silica gel; Ice crystals; Physiological quality; Rapid drying. |
Thesaurus NAL: |
Recalcitrant seeds. |
Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/204558/1/Cryopreservation-of-Coffea-canephora-Pierre.pdf
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Marc: |
LEADER 02404naa a2200229 a 4500 001 2114203 005 2019-11-12 008 2019 bl uuuu u00u1 u #d 100 1 $aCOELHO, S. V. B. 245 $aCryopreservation of Coffea canephora Pierre ex A. Froehner seeds$bimportance of drying rate and moisture content.$h[electronic resource] 260 $c2019 520 $aSeeds of the Coffea canephora species are considered more recalcitrant than those of the Coffea arabica species. They tolerate partial dehydration and they cannot be stored in conventional seed banks at -18ºC because they are sensitive to freezing temperatures. Cryopreservation is a reliable method for storing seeds with these characteristics for long periods. However, preliminary studies are necessary to determine ideal storage conditions. The aim of this study was to investigate the ideal physical and physiological conditions for cryopreservation of Coffea canephora seeds to reduce seed mortality caused by the formation of intracellular ice crystals and to avoid cell damage caused by excessive desiccation. Seeds were subjected to rapid drying in silica gel and slow drying in saturated NaCl solution to moisture contents of 0.20, 0.25, and 0.28 g.g-¹ (dry basis), followed by direct immersion in liquid nitrogen for rapid freezing. Physiological and biochemical analyses were performed to evaluate seed quality before and after cryopreservation. Rapid drying of Coffea canephora seeds to values near 0.20 g.g-1 (db) does not cause reduction in physiological quality. Moisture content of 0.25 g.g-¹ brings about greater survival of Coffea canephora seeds after cryopreservation. Drying rate affects the physiological quality of cryopreserved Coffea canephora seeds, and rapid drying in silica gel is more favorable than slow drying in a saturated NaCl solution. The activity of the enzymes catalase, esterase, glutamic oxaloacetic transaminase, and polyphenol oxidase are indicators of seed quality for Coffea canephora seeds subjected to cryopreservation. 650 $aRecalcitrant seeds 653 $aAntioxidant enzymes 653 $aDrying in silica gel 653 $aIce crystals 653 $aPhysiological quality 653 $aRapid drying 700 1 $aROSA, S. D. V. F. da 700 1 $aFANTAZZINI, T. B. 700 1 $aSILVA, L. C. 773 $tAustralian Journal of Crop Science$gv.13, n. 8, p. 1335-1342, 2019.
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