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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
07/07/1993 |
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Data da última atualização: |
20/04/2023 |
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Autoria: |
SYVERTSEN, J. P.; SMITH JUNIOR, M. L.; ALLEN, J. C. |
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Afiliação: |
University of Florida, Institute of Food and Agricultural Sciences, Agricultural Research and Education Center, Lake Alfred, Florida 33850, U.S.A. |
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Título: |
Growth rate and water relations of citrus leaf flushes. |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
Annals of Botany, v.47,n.1, p.97-105, 1981. |
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Idioma: |
Inglês |
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Conteúdo: |
Growth rates of seasonal leaf flushes of 'Valencia' orange [Citrus sinensis (L.) Osbeck] were measured and water relations characteristics of young (new) and over-wintered (old) citrus leaves were compared. New flush leaves had lower specific leaf weights and lower midday leaf water potentials than comparably exposed old leaves. Spring and summer flush new leaves had higher osmotic potentials than old leaves.These differences became non-significant as the new leaves matured. During summer conditions, water-stressed new leaves reached zero turgor and stomatal conductance also began to decrease in them at higher leaf water potentials. Opened flowers and new flush leaves lost more water, on a dry weigh basis, than flower buds, fruit or mature leaves. The results illustrate differences in leaf water potential and stomatal conductance which can be attributed to the maintenance of leaf turgor by decreases in leaf osmotic potentials as leaves mature. These changes in citrus leaf water relations are especially important since water stress resulting from high water losss rates of new tissues reduce flowering and fruit set. |
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Palavras-Chave: |
Grapefruit; Growth rate; Leaf water relations; Macf; Orange; Osmotic potencial; Paradisi. |
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Thesaurus Nal: |
Citrus; stomatal conductance. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01799naa a2200253 a 4500
001 1646264
005 2023-04-20
008 1981 bl uuuu u00u1 u #d
100 1 $aSYVERTSEN, J. P.
245 $aGrowth rate and water relations of citrus leaf flushes.$h[electronic resource]
260 $c1981
520 $aGrowth rates of seasonal leaf flushes of 'Valencia' orange [Citrus sinensis (L.) Osbeck] were measured and water relations characteristics of young (new) and over-wintered (old) citrus leaves were compared. New flush leaves had lower specific leaf weights and lower midday leaf water potentials than comparably exposed old leaves. Spring and summer flush new leaves had higher osmotic potentials than old leaves.These differences became non-significant as the new leaves matured. During summer conditions, water-stressed new leaves reached zero turgor and stomatal conductance also began to decrease in them at higher leaf water potentials. Opened flowers and new flush leaves lost more water, on a dry weigh basis, than flower buds, fruit or mature leaves. The results illustrate differences in leaf water potential and stomatal conductance which can be attributed to the maintenance of leaf turgor by decreases in leaf osmotic potentials as leaves mature. These changes in citrus leaf water relations are especially important since water stress resulting from high water losss rates of new tissues reduce flowering and fruit set.
650 $aCitrus
650 $astomatal conductance
653 $aGrapefruit
653 $aGrowth rate
653 $aLeaf water relations
653 $aMacf
653 $aOrange
653 $aOsmotic potencial
653 $aParadisi
700 1 $aSMITH JUNIOR, M. L.
700 1 $aALLEN, J. C.
773 $tAnnals of Botany$gv.47,n.1, p.97-105, 1981.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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