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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
10/01/2000 |
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Data da última atualização: |
10/01/2000 |
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Autoria: |
KOCH, K. E.; LOWELL, C. A.; AVIGNE, W. T. |
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Afiliação: |
Fruit Crops Departiment, University of Florida, Gainesville. |
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Título: |
Assimilate transfer through citrus juice vesicle stalks: a nonvascular portion of the transport path. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Plant Biology, v.1, p.247-258, 1986. |
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Idioma: |
Inglês |
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Conteúdo: |
Anatomical and ultrastructural examinations of the pholoem-free, hairlike stalks of citrus juice vesicles show elongated parenchyma cells with plasmodesmatal frequencies that fall within the range observed for nonphotosynthetic parenchyma tissues in other species. Calculations indicate that symplastic networks less dense tha those of vesicle stalks are sufficient to transfer assimilates in other systems, depending on rates of sucrose movement. At least a portion of the influx through juice vesicle stalks could therefore theoretically maintained via plasmodesmata. Experiments using rows of juice vesicles isolated with an asociated vascular bundle demonstrate that vesicle stalks continue to transfer labeled assimilates even after cells in this strand are killed by localized freezing. |
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Palavras-Chave: |
Anatomy. |
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Thesagro: |
Anatomia; Citrus Paradisi; Fisiologia; Pomelo; Suco. |
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Thesaurus Nal: |
physiology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01390naa a2200229 a 4500
001 1648540
005 2000-01-10
008 1986 bl --- 0-- u #d
100 1 $aKOCH, K. E.
245 $aAssimilate transfer through citrus juice vesicle stalks$ba nonvascular portion of the transport path.
260 $c1986
520 $aAnatomical and ultrastructural examinations of the pholoem-free, hairlike stalks of citrus juice vesicles show elongated parenchyma cells with plasmodesmatal frequencies that fall within the range observed for nonphotosynthetic parenchyma tissues in other species. Calculations indicate that symplastic networks less dense tha those of vesicle stalks are sufficient to transfer assimilates in other systems, depending on rates of sucrose movement. At least a portion of the influx through juice vesicle stalks could therefore theoretically maintained via plasmodesmata. Experiments using rows of juice vesicles isolated with an asociated vascular bundle demonstrate that vesicle stalks continue to transfer labeled assimilates even after cells in this strand are killed by localized freezing.
650 $aphysiology
650 $aAnatomia
650 $aCitrus Paradisi
650 $aFisiologia
650 $aPomelo
650 $aSuco
653 $aAnatomy
700 1 $aLOWELL, C. A.
700 1 $aAVIGNE, W. T.
773 $tPlant Biology$gv.1, p.247-258, 1986.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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