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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
08/10/2013 |
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Data da última atualização: |
18/04/2023 |
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Autoria: |
CAVALCANTE, I. H. L.; SILVA-MATOS, R. R. S. da; ALBANO, G. G.; SILVA JÚNIOR, G. B. da; SILVA, A. M. da; COSTA, L. S. da. |
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Afiliação: |
ÍTALO HERBERT LUCENA CAVALCANTE; RAISSA RACHEL SALUSTRIANO DA SILVA-MATOS; FRANCISCA GISLENE ALBANO; GABRIEL BARBOSA DA SILVA JÚNIOR; ADRIEL MOURA DA SILVA; LEONEL SOARES DA COSTA. |
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Título: |
Foliar spray of humic substances on seedling production of yellow passion fruit. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Journal of Food, Agriculture & Environment, v. 11, n. 2, p. 301-304. 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this research was to study the effect of humic substances on seedling production of yellow passion fruit. A completed randomized blocks design with five treatments (humic substance doses) was adopted, with five repetitions of 10 seedlings each. The following humic substances doses 0 (unsprayed), 7.5, 15.0, 22.5 and 30 ml m-2 (0, 0.40, 0.80, 1.19 and 1.59 ml seedling-1) were sprayed at 15, 25 and 35 days after sowing. At the end of the experiment (60 days after sowing) the following variables were recorded: plant height, stem diameter, dry weight of shoots and roots, root length, root volume and leaf chlorophyll. Humic substances sprayed positively affected aerial part and root system of yellow passion fruit seedlings and seedling quality of passion fruit was improved by humic acid foliar spray although further studies are needed to obtain a dose recommendation |
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Palavras-Chave: |
Ácidos orgânicos; Maracujá amarelo; Passion fruit; Substâncias húmicas. |
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Thesagro: |
Maracujá; Muda; Passiflora Edulis. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
null
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Registro original: |
Embrapa Semiárido (CPATSA) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
22/02/2010 |
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Data da última atualização: |
16/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
CORDEIRO, Y. E. M.; PINHEIRO, H. A.; SANTOS FILHO, B. G. dos; CORREA, S. S.; SILVA, J. R. R. e; DIAS-FILHO, M. B. |
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Afiliação: |
UFRA; UFRA; UFRA; UFRA; UFRA; MOACYR BERNARDINO DIAS FILHO, CPATU. |
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Título: |
Physiological and morphological responses of young mahogany (Swietenia macrophylla King) plants to drought. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 258, n. 7, p. 1449-1455, Sep. 2009. |
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DOI: |
10.1016/j.foreco.2009.06.054 |
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Idioma: |
Inglês |
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Conteúdo: |
Young mahogany (Swietenia macrophylla King) plants were grown under either well-watered (pre-dawn leaf water potential, ?pd, ca. ?0.40 MPa) or drought (?pd, ca. ?3.52 MPa) conditions to examine some physiological strategies that allow the maintenance of leaf turgor. In well-watered plants, stomatal conductance (gs) was nearly constant (440 mmol m?2 s?1) between 7:00 and 13:00 h. This was accomplished by significant increases in transpiration (E) and apparent total hydraulic conductance (KT), in which averages were higher at 13:00 h. From 13:00 to 17:00 h, gs, E, and KT decreased sharply, reaching their lower values at 17:00 h. In these plants, significant increases in height (116%), stem diameter (50%) and leaf area (200%) were registered over the experimental period (20 days). Analyses of linear regression between gs or E and leaf-to-air vapor pressure deficit (?w) were not significant. In water-stressed plants, gs and E were higher at 7:00 h and lower from 9:00 to 17:00 h, while KT was higher in early morning (7:00 h) and in late afternoon (17:00 h) than between 9:00 and 15:00 h. Moreover, both gs and E decreased potentially (P < 0.001) with the diurnal increases on ?w. Drought also decreased leaf and leaflet numbers and reduced total leaf area, but had no effect on stem height and diameter. Leaf proline was higher (ca. 400%, between 13:00 and 15:00 h) in water-stressed plants, suggesting osmotic adjustment under drought. Twelve hours after resumption of irrigation, ?pd was similar (P > 0.05) between well-watered and drought-stressed plants, suggesting an ability of plants to recover turgor after stress cessation. Altogether, our data support the hypothesis that young mahogany plants have the ability to satisfactorily tolerate or postpone drought. MenosYoung mahogany (Swietenia macrophylla King) plants were grown under either well-watered (pre-dawn leaf water potential, ?pd, ca. ?0.40 MPa) or drought (?pd, ca. ?3.52 MPa) conditions to examine some physiological strategies that allow the maintenance of leaf turgor. In well-watered plants, stomatal conductance (gs) was nearly constant (440 mmol m?2 s?1) between 7:00 and 13:00 h. This was accomplished by significant increases in transpiration (E) and apparent total hydraulic conductance (KT), in which averages were higher at 13:00 h. From 13:00 to 17:00 h, gs, E, and KT decreased sharply, reaching their lower values at 17:00 h. In these plants, significant increases in height (116%), stem diameter (50%) and leaf area (200%) were registered over the experimental period (20 days). Analyses of linear regression between gs or E and leaf-to-air vapor pressure deficit (?w) were not significant. In water-stressed plants, gs and E were higher at 7:00 h and lower from 9:00 to 17:00 h, while KT was higher in early morning (7:00 h) and in late afternoon (17:00 h) than between 9:00 and 15:00 h. Moreover, both gs and E decreased potentially (P < 0.001) with the diurnal increases on ?w. Drought also decreased leaf and leaflet numbers and reduced total leaf area, but had no effect on stem height and diameter. Leaf proline was higher (ca. 400%, between 13:00 and 15:00 h) in water-stressed plants, suggesting osmotic adjustment under drought. Twelve hours after resumption of irrigation, ?pd wa... Mostrar Tudo |
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Palavras-Chave: |
Transpiração. |
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Thesagro: |
Água; Mogno. |
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Categoria do assunto: |
-- |
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Marc: |
null
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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