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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
17/02/2000 |
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Data da última atualização: |
17/02/2000 |
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Autoria: |
JONES, M. M.; RAWSON, H. M. |
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Afiliação: |
Department of Environmental Biology, Research School of Biological Sciences, Australian National University, Camber City, A.C.T., Australia and Division of Plant Industry, CSIRO, Camber City, A.C.T., Australia. |
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Título: |
Influence of rate of developmente of leaf water deficits upon photosynthesis, leaf conductance, water use efficiency, and osmotic potential in sorghum. |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
Physiol. Plant., v.45, p.103-111, 1979. |
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Idioma: |
Inglês |
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Conteúdo: |
This estudy the effect of rate of development of leaf water deficits in soil-grown sorghum (Sorghum bicolor) on the relationship of net photosynthesis, leaf conductance, and water use efficiency to leaf water potential, and on the degree of solute accumulation (osmotic adjustiment). Recovery of these processes on rewatering, and responses during a second stress cycle were also studied. The most rapid rate of stress (1.2 MPa day-1) resulted in no solute accumulation and the lowest rate of net photosynthesis and leaf conductance for any given leaf water potential during stress. Stress at 0.7 and 0.15 MPa day-1 led to equal solute accumulations of approximately 0.6 MPa, but net photosynthesis, leaf conductance, and water use efficiency at a given leaf water potential were lower with the faster rate of stress (0.7 MPa day-1). |
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Categoria do assunto: |
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Marc: |
LEADER 01276naa a2200133 a 4500
001 1648653
005 2000-02-17
008 1979 bl --- 0-- u #d
100 1 $aJONES, M. M.
245 $aInfluence of rate of developmente of leaf water deficits upon photosynthesis, leaf conductance, water use efficiency, and osmotic potential in sorghum.
260 $c1979
520 $aThis estudy the effect of rate of development of leaf water deficits in soil-grown sorghum (Sorghum bicolor) on the relationship of net photosynthesis, leaf conductance, and water use efficiency to leaf water potential, and on the degree of solute accumulation (osmotic adjustiment). Recovery of these processes on rewatering, and responses during a second stress cycle were also studied. The most rapid rate of stress (1.2 MPa day-1) resulted in no solute accumulation and the lowest rate of net photosynthesis and leaf conductance for any given leaf water potential during stress. Stress at 0.7 and 0.15 MPa day-1 led to equal solute accumulations of approximately 0.6 MPa, but net photosynthesis, leaf conductance, and water use efficiency at a given leaf water potential were lower with the faster rate of stress (0.7 MPa day-1).
700 1 $aRAWSON, H. M.
773 $tPhysiol. Plant.$gv.45, p.103-111, 1979.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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