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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
17/08/1993 |
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Data da última atualização: |
17/08/1993 |
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Autoria: |
HALL, A. E.; CAMACHO-B, S. E.; KAUFMANN, M. R. |
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Afiliação: |
University of California, Riverside, California 92502; Instituto Columbiano Agropecuario, Apartado Aereo 7984, Bogota, D.E., Colombia, SouthAmerica. |
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Título: |
Regulation of Water Loss by Citrus Leaves. |
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Ano de publicação: |
0 |
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Fonte/Imprenta: |
Colheita; Clima seco; Laranja doce; Muda. |
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Páginas: |
p.04 |
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Idioma: |
Inglês |
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Conteúdo: |
The factores responsible for the low transpiration rates of citrus were investigated. Leaf resistance to water vapor exchange by orange seedlings (Citrus Sinensis L. cv. Koethen) including a substantial boundary layer resistance, was as low as 1 s cm-1 in humid air. Leaf resistance of well watered plants increased to values as large as 5 s cm-1 when the difference in absolute humidity between leaf and air was increased. Leaf resistance was only slightly influenced by temperature between 20 and 30 dgree C providing the humidity difference between leaf and air was kept constant. Leaf resistance increased when leaf temperature was increased between 20 and 30 dgree C when the absolute humidity external to the leaf was kept constant. Increased humidity differences resulted in greater increases in leaf resistance during initial experiments than when the experiments were repeated with the same leaves indicating acclimation by the plant. It was concluded that the effects of humidity differences on leaf resistance are partially responsible for the low transpiration rates of citrus. |
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Palavras-Chave: |
Clima seco. |
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Thesagro: |
Colheita; Laranja Doce; Muda. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01579naa a2200205 a 4500
001 1646273
005 1993-08-17
008 bl --- 0-- u #d
100 1 $aHALL, A. E.
245 $aRegulation of Water Loss by Citrus Leaves.
260 $c0
300 $ap.04
520 $aThe factores responsible for the low transpiration rates of citrus were investigated. Leaf resistance to water vapor exchange by orange seedlings (Citrus Sinensis L. cv. Koethen) including a substantial boundary layer resistance, was as low as 1 s cm-1 in humid air. Leaf resistance of well watered plants increased to values as large as 5 s cm-1 when the difference in absolute humidity between leaf and air was increased. Leaf resistance was only slightly influenced by temperature between 20 and 30 dgree C providing the humidity difference between leaf and air was kept constant. Leaf resistance increased when leaf temperature was increased between 20 and 30 dgree C when the absolute humidity external to the leaf was kept constant. Increased humidity differences resulted in greater increases in leaf resistance during initial experiments than when the experiments were repeated with the same leaves indicating acclimation by the plant. It was concluded that the effects of humidity differences on leaf resistance are partially responsible for the low transpiration rates of citrus.
650 $aColheita
650 $aLaranja Doce
650 $aMuda
653 $aClima seco
700 1 $aCAMACHO-B, S. E.
700 1 $aKAUFMANN, M. R.
773 $tColheita; Clima seco; Laranja doce; Muda.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
