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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
10/09/2014 |
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Data da última atualização: |
25/05/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALVES, A. A. C.; SETTER, TIM L. |
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Afiliação: |
ALFREDO AUGUSTO CUNHA ALVES, CNPMF; TIM L. SETTER, Cornell University. |
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Título: |
Response of Cassava Leaf Area Expansion to Water Deficit: Cell Proliferation, Cell Expansion and Delayed Development. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Annals of Botany, n. 94, p. 605-613, 2014. |
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ISSN: |
0305-7364 |
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DOI: |
10.1093/aob/mch179 |
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Idioma: |
Inglês |
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Conteúdo: |
Background and Aims Cassava (Manihot esculenta) is an important food crop in the tropics that has a high growth rate in optimal conditions, but also performs well in drought-prone climates. The objectives of this work were to determine the effects of water deficit and rewatering on the rate of expansion of leaves at different developmental stages and to evaluate the extent to which decreases in cell proliferation, expansion, and delay in development are responsible for reduced growth. Methods Glasshouse-grown cassava plants were subjected to 8 d of water deficit followed by rewatering. Leaves at 15 developmental stages from nearly full size to meristematic were sampled, and epidermal cell size and number were measured on leaves at four developmental stages. Methods Glasshouse-grown cassava plants were subjected to 8 d of water deficit followed by rewatering. Leaves at 15 developmental stages from nearly full size to meristematic were sampled, and epidermal cell size and number were measured on leaves at four developmental stages. Key Results Leaf expansion and development were nearly halted during stress but resumed vigorously after rewatering. In advanced-stage leaves (Group 1) in which development was solely by cell expansion, expansion resumed after rewatering, but not sufficiently for cell size to equal that of controls at maturity. In Group 2 (cell proliferation), relative expansion rate and cell proliferation were delayed until rewatering, but then recovered partially, so that loss of leaf area was due to decreased cell numbers per leaf. In Group 3 (early meristematic development) final leaf area was not affected by stress, but development was delayed by 4?6 d. On a plant basis, the proportion of loss of leaf area over 26 d attributed to leaves at each developmental stage was 29, 50 and 21 % in Group 1, 2 and 3, respectively. Conclusions Although cell growth processes were sensitive to mild water deficit, they recovered to a large extent, and much of the reduction in leaf area was caused by developmental delay and a reduction in cell division in the youngest, meristematic leaves. MenosBackground and Aims Cassava (Manihot esculenta) is an important food crop in the tropics that has a high growth rate in optimal conditions, but also performs well in drought-prone climates. The objectives of this work were to determine the effects of water deficit and rewatering on the rate of expansion of leaves at different developmental stages and to evaluate the extent to which decreases in cell proliferation, expansion, and delay in development are responsible for reduced growth. Methods Glasshouse-grown cassava plants were subjected to 8 d of water deficit followed by rewatering. Leaves at 15 developmental stages from nearly full size to meristematic were sampled, and epidermal cell size and number were measured on leaves at four developmental stages. Methods Glasshouse-grown cassava plants were subjected to 8 d of water deficit followed by rewatering. Leaves at 15 developmental stages from nearly full size to meristematic were sampled, and epidermal cell size and number were measured on leaves at four developmental stages. Key Results Leaf expansion and development were nearly halted during stress but resumed vigorously after rewatering. In advanced-stage leaves (Group 1) in which development was solely by cell expansion, expansion resumed after rewatering, but not sufficiently for cell size to equal that of controls at maturity. In Group 2 (cell proliferation), relative expansion rate and cell proliferation were delayed until rewatering, but then recovered partially,... Mostrar Tudo |
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Thesagro: |
Irrigação; Mandioca; Manihot Esculenta; Seca. |
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Thesaurus Nal: |
Cassava; Plant-water relations. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02797naa a2200229 a 4500
001 1994756
005 2023-05-25
008 2014 bl uuuu u00u1 u #d
022 $a0305-7364
024 7 $a10.1093/aob/mch179$2DOI
100 1 $aALVES, A. A. C.
245 $aResponse of Cassava Leaf Area Expansion to Water Deficit$bCell Proliferation, Cell Expansion and Delayed Development.$h[electronic resource]
260 $c2014
520 $aBackground and Aims Cassava (Manihot esculenta) is an important food crop in the tropics that has a high growth rate in optimal conditions, but also performs well in drought-prone climates. The objectives of this work were to determine the effects of water deficit and rewatering on the rate of expansion of leaves at different developmental stages and to evaluate the extent to which decreases in cell proliferation, expansion, and delay in development are responsible for reduced growth. Methods Glasshouse-grown cassava plants were subjected to 8 d of water deficit followed by rewatering. Leaves at 15 developmental stages from nearly full size to meristematic were sampled, and epidermal cell size and number were measured on leaves at four developmental stages. Methods Glasshouse-grown cassava plants were subjected to 8 d of water deficit followed by rewatering. Leaves at 15 developmental stages from nearly full size to meristematic were sampled, and epidermal cell size and number were measured on leaves at four developmental stages. Key Results Leaf expansion and development were nearly halted during stress but resumed vigorously after rewatering. In advanced-stage leaves (Group 1) in which development was solely by cell expansion, expansion resumed after rewatering, but not sufficiently for cell size to equal that of controls at maturity. In Group 2 (cell proliferation), relative expansion rate and cell proliferation were delayed until rewatering, but then recovered partially, so that loss of leaf area was due to decreased cell numbers per leaf. In Group 3 (early meristematic development) final leaf area was not affected by stress, but development was delayed by 4?6 d. On a plant basis, the proportion of loss of leaf area over 26 d attributed to leaves at each developmental stage was 29, 50 and 21 % in Group 1, 2 and 3, respectively. Conclusions Although cell growth processes were sensitive to mild water deficit, they recovered to a large extent, and much of the reduction in leaf area was caused by developmental delay and a reduction in cell division in the youngest, meristematic leaves.
650 $aCassava
650 $aPlant-water relations
650 $aIrrigação
650 $aMandioca
650 $aManihot Esculenta
650 $aSeca
700 1 $aSETTER, TIM L.
773 $tAnnals of Botany$gn. 94, p. 605-613, 2014.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agropecuária Oeste. |
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Data corrente: |
15/03/1999 |
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Data da última atualização: |
17/07/2008 |
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Autoria: |
MELO FILHO, G. A. de; RICHETTI, A. |
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Título: |
Perfil socioeconomico e tecnológico dos produtores de soja e milho de Mato Grosso do Sul. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
In: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO CENTRAL DO BRASIL, 20., 1998, Londrina, PR. Ata e resumos... Londrina: EMBRAPA-CNPSo, 1998. |
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Páginas: |
p. 170-171. |
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Série: |
(EMBRAPA-CNPSo. Documentos, 121). |
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Idioma: |
Português |
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Palavras-Chave: |
Brasil; Caracterizacao; Maize; Mato Grosso do Sul; Soybean; Use; Uso. |
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Thesagro: |
Cerrado; Glycine Max; Milho; Produtor; Soja; Tecnologia; Zea Mays. |
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Thesaurus NAL: |
Brazil; farmers; soybeans; technology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00992naa a2200361 a 4500
001 1243815
005 2008-07-17
008 1998 bl uuuu u00u1 u #d
100 1 $aMELO FILHO, G. A. de
245 $aPerfil socioeconomico e tecnológico dos produtores de soja e milho de Mato Grosso do Sul.
260 $c1998
300 $ap. 170-171.
490 $a(EMBRAPA-CNPSo. Documentos, 121).
650 $aBrazil
650 $afarmers
650 $asoybeans
650 $atechnology
650 $aCerrado
650 $aGlycine Max
650 $aMilho
650 $aProdutor
650 $aSoja
650 $aTecnologia
650 $aZea Mays
653 $aBrasil
653 $aCaracterizacao
653 $aMaize
653 $aMato Grosso do Sul
653 $aSoybean
653 $aUse
653 $aUso
700 1 $aRICHETTI, A.
773 $tIn: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO CENTRAL DO BRASIL, 20., 1998, Londrina, PR. Ata e resumos... Londrina: EMBRAPA-CNPSo, 1998.
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