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000005901 0247_ $$2DOI$$a10.1104/pp.109.141044
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000005901 084__ $$2WoS$$aPlant Sciences
000005901 1001_ $$0P:(DE-Juel1)129422$$aWindt, C. W.$$b0$$uFZJ
000005901 245__ $$aMost Water in the Tomato Truss Is Imported through the Xylem, Not the Phloem: A Nuclear Magnetic Resonance Flow Imaging Study
000005901 260__ $$aRockville, Md.: Soc.$$bJSTOR$$c2009
000005901 300__ $$a830 - 842
000005901 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000005901 440_0 $$04987$$aPlant Physiology$$v151$$x0032-0889$$y1
000005901 500__ $$aRecord converted from VDB: 12.11.2012
000005901 520__ $$aIn this study, we demonstrate nuclear magnetic resonance flow imaging of xylem and phloem transport toward a developing tomato (Solanum lycopersicum) truss. During an 8-week period of growth, we measured phloem and xylem fluxes in the truss stalk, aiming to distinguish the contributions of the two transport tissues and draw up a balance between influx and efflux. It is commonly estimated that about 90% of the water reaches the fruit by the phloem and the remaining 10% by the xylem. The xylem is thought to become dysfunctional at an early stage of fruit development. However, our results do not corroborate these findings. On the contrary, we found that xylem transport into the truss remained functional throughout the 8 weeks of growth. During that time, at least 75% of the net influx into the fruit occurred through the external xylem and about 25% via the perimedullary region, which contains both phloem and xylem. About one-half of the net influx was lost due to evaporation. Halfway through truss development, a xylem backflow appeared. As the truss matured, the percentage of xylem water that circulated into the truss and out again increased in comparison with the net uptake, but no net loss of water from the truss was observed. The circulation of xylem water continued even after the fruits and pedicels were removed. This indicates that neither of them was involved in generating or conducting the circulation of sap. Only when the main axis of the peduncle was cut back did the circulation stop.
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000005901 588__ $$aDataset connected to Web of Science, Pubmed
000005901 650_2 $$2MeSH$$aBiological Transport
000005901 650_2 $$2MeSH$$aLycopersicon esculentum: growth & development
000005901 650_2 $$2MeSH$$aLycopersicon esculentum: physiology
000005901 650_2 $$2MeSH$$aMagnetic Resonance Spectroscopy
000005901 650_2 $$2MeSH$$aPhloem: physiology
000005901 650_2 $$2MeSH$$aRheology: methods
000005901 650_2 $$2MeSH$$aWater: physiology
000005901 650_2 $$2MeSH$$aXylem: physiology
000005901 650_7 $$07732-18-5$$2NLM Chemicals$$aWater
000005901 650_7 $$2WoSType$$aJ
000005901 7001_ $$0P:(DE-HGF)0$$aGerkema, E.$$b1
000005901 7001_ $$0P:(DE-HGF)0$$aVan As, H.$$b2
000005901 773__ $$0PERI:(DE-600)2004346-6$$a10.1104/pp.109.141044$$gVol. 151, p. 830 - 842$$p830 - 842$$q151<830 - 842$$tPlant physiology$$v151$$x0032-0889$$y2009
000005901 8567_ $$2Pubmed Central$$uhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC2754649
000005901 8564_ $$uhttps://juser.fz-juelich.de/record/5901/files/FZJ-5901.pdf$$yRestricted$$zPublished final document.
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000005901 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000005901 9141_ $$y2009
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000005901 9201_ $$0I:(DE-Juel1)ICG-3-20090406$$d31.10.2010$$gICG$$kICG-3$$lPhytosphäre$$x1
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