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dc.contributor.authorClearwater, Michael J.
dc.contributor.authorLuo, Z.
dc.contributor.authorOng, S. E. C.
dc.contributor.authorBlattmann, P.
dc.contributor.authorThorp, T. G.
dc.coverage.spatialEnglanden_NZ
dc.date.accessioned2013-01-09T21:15:44Z
dc.date.available2013-01-09T21:15:44Z
dc.date.copyright2012-03-06
dc.date.issued2011
dc.identifier.citationClearwater, M. J., Luo, Z., Ong, S. E. C., Blattmann, P., & Thorp, T. G. (2012). Vascular functioning and the water balance of ripening kiwifruit (Actinidia chinensis) berries. Journal of Experimental Botany, 63(5), 1835-1847.en_NZ
dc.identifier.issn1460-2431
dc.identifier.urihttps://hdl.handle.net/10289/7006
dc.description.abstractIndirect evidence suggests that water supply to fleshy fruits during the final stages of development occurs through the phloem, with the xylem providing little water, or acting as a pathway for water loss back to the plant. This inference was tested by examining the water balance and vascular functioning of ripening kiwifruit berries (Actinidia chinensis var. chinensis ‘Hort16A’) exhibiting a pre-harvest ‘shrivel’ disorder in California, and normal development in New Zealand. Dye labelling and mass balance experiments indicated that the xylem and phloem were both functional and contributed approximately equally to the fruit water supply during this stage of development. The modelled fruit water balance was dominated by transpiration, with net water loss under high vapour pressure deficit (Da) conditions in California, but a net gain under cooler New Zealand conditions. Direct measurement of pedicel sap flow under controlled conditions confirmed inward flows in both the phloem and xylem under conditions of both low and high Da. Phloem flows were required for growth, with gradual recovery after a step increase in Da. Xylem flows alone were unable to support growth, but did supply transpiration and were responsive to Da-induced pressure fluctuations. The results suggest that the shrivel disorder was a consequence of a high fruit transpiration rate, and that the perception of complete loss or reversal of inward xylem flows in ripening fruits should be re-examined.en_NZ
dc.language.isoen
dc.publisherOxford University Pressen_NZ
dc.relation.ispartofJournal of Experimental Botany
dc.subjectActinidia chinensisen_NZ
dc.subjectberry shrivelen_NZ
dc.subjecthydraulic conductanceen_NZ
dc.subjectkiwifruiten_NZ
dc.subjectphloemen_NZ
dc.subjectsap flowen_NZ
dc.subjecttranspirationen_NZ
dc.subjectxylemen_NZ
dc.titleVascular functioning and the water balance of ripening kiwifruit (Actinidia chinensis) berriesen_NZ
dc.typeJournal Articleen_NZ
dc.identifier.doi10.1093/jxb/err352en_NZ
dc.relation.isPartOfJournal of Experimental Botanyen_NZ
pubs.begin-page1en_NZ
pubs.elements-id36899
pubs.end-page13en_NZ
pubs.issue5en_NZ
pubs.volume_onlineen_NZ


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