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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
16/10/2008 |
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Data da última atualização: |
19/02/2009 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SETTER, T. L.; DUQUE, L.; ALVES, A. |
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Afiliação: |
Tim L. Setter, Cornell University; Luis Duque, Cornell University; Alfredo Augusto Cunha Alves, CNPMF. |
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Título: |
Drought tolerance mechanisms in cassava. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: SCIENTIFIC MEETING OF THE GLOBAL CASSAVA PARTNERSHIP, 1., 2008, Ghent. Cassava: meeting the challenges of the new millennium. Ghent:: IPBO, 2008. p. 148. |
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Idioma: |
Inglês |
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Notas: |
SP10-08. |
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Conteúdo: |
Cassava is considered a food security crop in drought-prone regions. The goals of our work are to determine which traits contribute to its maintenance of yield in water stress environments. Our studies in controlled environments indicate that cassava stomata close in response to slight decreases in leaf water status and maintain leaf water potential at values near those of well-watered controls. This is associated with rapid and large increases in abscisic acid (ABA). Also, as stress continues, a substantial fraction of leaves abscise, thereby decreasing transpirational surface area and further conserving water during stress periods. New leaf production and expansion growth is also highly sensitive to water deficit, due to inhibition of leaf cell division, cell expansion. However, growth recovers rapidly after renewed water supply, thereby permiting rapid re-establishment of leaf area. Carbon use is down-regulated by limiting growth and not substantially accumulating osmotically active solutes. Also, petiole and stem carbohydrate reserves are gradually utilized and translocated to sinks throughout the plant. The amount of starch stored in stems is considerable, representing a large share of the total non-structural carbohydrate in a plant at the initial period of storage root growth. In summary, the mechanisms used by cassava to tolerate water deficit episodes are: 1) rapidly limit transpiration such that its tissues are not expossed to injorious low water potential stress, 2) down-regulated growth and carbon consumption in leaves and storage roots, and 3) supply metabolic needs via remobolization from reserves in petioles and stems. MenosCassava is considered a food security crop in drought-prone regions. The goals of our work are to determine which traits contribute to its maintenance of yield in water stress environments. Our studies in controlled environments indicate that cassava stomata close in response to slight decreases in leaf water status and maintain leaf water potential at values near those of well-watered controls. This is associated with rapid and large increases in abscisic acid (ABA). Also, as stress continues, a substantial fraction of leaves abscise, thereby decreasing transpirational surface area and further conserving water during stress periods. New leaf production and expansion growth is also highly sensitive to water deficit, due to inhibition of leaf cell division, cell expansion. However, growth recovers rapidly after renewed water supply, thereby permiting rapid re-establishment of leaf area. Carbon use is down-regulated by limiting growth and not substantially accumulating osmotically active solutes. Also, petiole and stem carbohydrate reserves are gradually utilized and translocated to sinks throughout the plant. The amount of starch stored in stems is considerable, representing a large share of the total non-structural carbohydrate in a plant at the initial period of storage root growth. In summary, the mechanisms used by cassava to tolerate water deficit episodes are: 1) rapidly limit transpiration such that its tissues are not expossed to injorious low water potential stress, ... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02159naa a2200157 a 4500
001 1637026
005 2009-02-19
008 2008 bl uuuu u00u1 u #d
100 1 $aSETTER, T. L.
245 $aDrought tolerance mechanisms in cassava.
260 $c2008
500 $aSP10-08.
520 $aCassava is considered a food security crop in drought-prone regions. The goals of our work are to determine which traits contribute to its maintenance of yield in water stress environments. Our studies in controlled environments indicate that cassava stomata close in response to slight decreases in leaf water status and maintain leaf water potential at values near those of well-watered controls. This is associated with rapid and large increases in abscisic acid (ABA). Also, as stress continues, a substantial fraction of leaves abscise, thereby decreasing transpirational surface area and further conserving water during stress periods. New leaf production and expansion growth is also highly sensitive to water deficit, due to inhibition of leaf cell division, cell expansion. However, growth recovers rapidly after renewed water supply, thereby permiting rapid re-establishment of leaf area. Carbon use is down-regulated by limiting growth and not substantially accumulating osmotically active solutes. Also, petiole and stem carbohydrate reserves are gradually utilized and translocated to sinks throughout the plant. The amount of starch stored in stems is considerable, representing a large share of the total non-structural carbohydrate in a plant at the initial period of storage root growth. In summary, the mechanisms used by cassava to tolerate water deficit episodes are: 1) rapidly limit transpiration such that its tissues are not expossed to injorious low water potential stress, 2) down-regulated growth and carbon consumption in leaves and storage roots, and 3) supply metabolic needs via remobolization from reserves in petioles and stems.
700 1 $aDUQUE, L.
700 1 $aALVES, A.
773 $tIn: SCIENTIFIC MEETING OF THE GLOBAL CASSAVA PARTNERSHIP, 1., 2008, Ghent. Cassava: meeting the challenges of the new millennium. Ghent:: IPBO, 2008. p. 148.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
08/02/2012 |
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Data da última atualização: |
09/02/2012 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SABINO, L. A.; SOUZA JÚNIOR, V. R.; ABREU, P. G. de; ABREU, V. M. N.; FARAH, M. M.; COLDEBELLA, A. |
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Afiliação: |
LUANA ARAÚJO SABINO, UFVJM; VILMAR RODRIGUES DE SOUZA JÚNIOR, UFVJM; PAULO GIOVANNI DE ABREU, CNPSA; VALERIA MARIA NASCIMENTO ABREU, CNPSA; MICHEL MARQUES FARAH, UFVLM; ARLEI COLDEBELLA, CNPSA. |
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Título: |
Avaliação do ambiente de dois modelos de sala de maternidade na suinocultura com o uso do programa surfer. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 48., 2011, Belém. Anais... Belém: UFRA, 2011. 1 CD-ROM. |
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Idioma: |
Português |
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Notas: |
Projeto: 11.11.11.111. |
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Palavras-Chave: |
Bem-estar animal; Conforto; Índice térmico. |
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Thesagro: |
Suíno; Temperatura. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/53585/1/avaliacao-do-ambiente-de-dois-modelos-de-sala-de-maternidade.pdf
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Marc: |
LEADER 00779nam a2200229 a 4500
001 1914640
005 2012-02-09
008 2011 bl uuuu u00u1 u #d
100 1 $aSABINO, L. A.
245 $aAvaliação do ambiente de dois modelos de sala de maternidade na suinocultura com o uso do programa surfer.$h[electronic resource]
260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 48., 2011, Belém. Anais... Belém: UFRA, 2011. 1 CD-ROM.$c2011
500 $aProjeto: 11.11.11.111.
650 $aSuíno
650 $aTemperatura
653 $aBem-estar animal
653 $aConforto
653 $aÍndice térmico
700 1 $aSOUZA JÚNIOR, V. R.
700 1 $aABREU, P. G. de
700 1 $aABREU, V. M. N.
700 1 $aFARAH, M. M.
700 1 $aCOLDEBELLA, A.
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Embrapa Suínos e Aves (CNPSA) |
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