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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
03/12/2010 |
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Data da última atualização: |
23/08/2013 |
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Autoria: |
BLACKMAN, G. E.; BLACK, J. N. |
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Título: |
Physiological and ecological studies in the analysis of plant environment. XI. A further assessment of the influence of shading on the growth of different species in the vegetative phase. |
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Ano de publicação: |
1959 |
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Fonte/Imprenta: |
Annals of Botany, London, v. 23, n. 1, p. 51-63, 1959. |
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Idioma: |
Inglês |
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Conteúdo: |
In a further analysis of the effects of varying light intensity on growth and development in the vegetative phase the reactions of thirteen herbaceous species have been recorded. In some experiments the degree of shading has been extended to 0.055 daylight, a level near or below the compensation point.
For Lathyrus maritimus, Trifolium pratense, and Vicia faba, the net assimilation rate is directly related to the logarithm of the light intensity, but for Helianthus annuus, T. repent, T. hybridum, Medicago sativa, Phaseolus multiflorus, and Lolium multiflorum the relationship, though curvilinear, is not logarithmic. It is concluded that for all species the assimilation rate of unshaded plants was limited by light even though in high summer the recorded light energy between 4,000–7,000 A averaged 1,900–2,200 foot-candles.
For all these species between daylight and 0.12 daylight the leaf-area ratio rises as the intensity decreases and in general the trend is logarithmic. When the degree of shading is increased to 0.055 daylight the logarithmic relationship still holds for L. maritimus and V. faba though this level is below the compensation point. For other species, such as P. multiflorus andH. annuus the trend may be reversed below 0.12 daylight and the ratio then falls.
When the light intensity is reduced from daylight to 0.5 daylight, then for the species already cited and for Lolium perenne, Phleum pratcnse, and Festuca pratensis the relative growth-rate is invariably depressed. At 0.055 daylight the relative growth-rate never exceeded 1 per cent. per day. For L. perennet, P. pratense, and Dactylis glomerata the reactions to shading of ‘hay’ and ‘grazing’ strains were different.
The ecological and physiological implications of these findings are discussed. MenosIn a further analysis of the effects of varying light intensity on growth and development in the vegetative phase the reactions of thirteen herbaceous species have been recorded. In some experiments the degree of shading has been extended to 0.055 daylight, a level near or below the compensation point.
For Lathyrus maritimus, Trifolium pratense, and Vicia faba, the net assimilation rate is directly related to the logarithm of the light intensity, but for Helianthus annuus, T. repent, T. hybridum, Medicago sativa, Phaseolus multiflorus, and Lolium multiflorum the relationship, though curvilinear, is not logarithmic. It is concluded that for all species the assimilation rate of unshaded plants was limited by light even though in high summer the recorded light energy between 4,000–7,000 A averaged 1,900–2,200 foot-candles.
For all these species between daylight and 0.12 daylight the leaf-area ratio rises as the intensity decreases and in general the trend is logarithmic. When the degree of shading is increased to 0.055 daylight the logarithmic relationship still holds for L. maritimus and V. faba though this level is below the compensation point. For other species, such as P. multiflorus andH. annuus the trend may be reversed below 0.12 daylight and the ratio then falls.
When the light intensity is reduced from daylight to 0.5 daylight, then for the species already cited and for Lolium perenne, Phleum pratcnse, and Festuca pratensis the relative growth-rate is invariably dep... Mostrar Tudo |
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Palavras-Chave: |
Plant environment. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02332naa a2200145 a 4500
001 1868653
005 2013-08-23
008 1959 bl --- 0-- u #d
100 1 $aBLACKMAN, G. E.
245 $aPhysiological and ecological studies in the analysis of plant environment. XI. A further assessment of the influence of shading on the growth of different species in the vegetative phase.
260 $c1959
520 $aIn a further analysis of the effects of varying light intensity on growth and development in the vegetative phase the reactions of thirteen herbaceous species have been recorded. In some experiments the degree of shading has been extended to 0.055 daylight, a level near or below the compensation point. For Lathyrus maritimus, Trifolium pratense, and Vicia faba, the net assimilation rate is directly related to the logarithm of the light intensity, but for Helianthus annuus, T. repent, T. hybridum, Medicago sativa, Phaseolus multiflorus, and Lolium multiflorum the relationship, though curvilinear, is not logarithmic. It is concluded that for all species the assimilation rate of unshaded plants was limited by light even though in high summer the recorded light energy between 4,000–7,000 A averaged 1,900–2,200 foot-candles. For all these species between daylight and 0.12 daylight the leaf-area ratio rises as the intensity decreases and in general the trend is logarithmic. When the degree of shading is increased to 0.055 daylight the logarithmic relationship still holds for L. maritimus and V. faba though this level is below the compensation point. For other species, such as P. multiflorus andH. annuus the trend may be reversed below 0.12 daylight and the ratio then falls. When the light intensity is reduced from daylight to 0.5 daylight, then for the species already cited and for Lolium perenne, Phleum pratcnse, and Festuca pratensis the relative growth-rate is invariably depressed. At 0.055 daylight the relative growth-rate never exceeded 1 per cent. per day. For L. perennet, P. pratense, and Dactylis glomerata the reactions to shading of ‘hay’ and ‘grazing’ strains were different. The ecological and physiological implications of these findings are discussed.
653 $aPlant environment
700 1 $aBLACK, J. N.
773 $tAnnals of Botany, London$gv. 23, n. 1, p. 51-63, 1959.
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Embrapa Trigo (CNPT) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
25/01/2013 |
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Data da última atualização: |
20/02/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
LIMA JUNIOR, M. S. da C.; ZORZENON, D. C. R.; DORVAL, M. E. C.; PONTES, E. R. J. C.; OSHIRO, E. T.; CUNHA, R.; ANDREOTTI, R.; MATOS, M. de F. C. |
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Afiliação: |
MANOEL SEBASTIÃO DA COSTA LIMA JUNIOR, Universidade Federal de Mato Grosso do Sul, Campo Grande (MS); DENIELLY CHRISTINA RODRIGUES ZORZENON, Universidade Federal de Mato Grosso do Sul, Campo Grande (MS); MARIA ELIZABETH CAVALHEIROS DORVAL, Universidade Federal de Mato Grosso do Sul, Campo Grande (MS); ELENIR ROSE JARDIM CURY PONTES, Universidade Federal de Mato Grosso do Sul, Campo Grande (MS); ELISA TERUYA OSHIRO, Universidade Federal de Mato Grosso do Sul, Campo Grande (MS); RODRIGO CUNHA, Universidade Federal de Mato Grosso do Sul, Campo Grande (MS); RENATO ANDREOTTI, CNPGC; MARIA DE FATIMA CEPA MATOS, Universidade Federal de Mato Grosso do Sul, Campo Grande (MS). |
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Título: |
Sensitivity of PCR and real-time PCR for the diagnosis of human visceral leishmaniasis using peripheral blood. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Asian Pacific Journal of Tropical Disease, v.3, n.1, p.10-15, 2013. |
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Idioma: |
Inglês |
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Thesagro: |
Leishmaniose; Sanidade Animal. |
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Thesaurus NAL: |
Leishmania. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00731naa a2200229 a 4500
001 1946503
005 2014-02-20
008 2013 bl uuuu u00u1 u #d
100 1 $aLIMA JUNIOR, M. S. da C.
245 $aSensitivity of PCR and real-time PCR for the diagnosis of human visceral leishmaniasis using peripheral blood.$h[electronic resource]
260 $c2013
650 $aLeishmania
650 $aLeishmaniose
650 $aSanidade Animal
700 1 $aZORZENON, D. C. R.
700 1 $aDORVAL, M. E. C.
700 1 $aPONTES, E. R. J. C.
700 1 $aOSHIRO, E. T.
700 1 $aCUNHA, R.
700 1 $aANDREOTTI, R.
700 1 $aMATOS, M. de F. C.
773 $tAsian Pacific Journal of Tropical Disease$gv.3, n.1, p.10-15, 2013.
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