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000036047 0247_ $$2DOI$$a10.1055/s-2004-817828
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000036047 084__ $$2WoS$$aPlant Sciences
000036047 1001_ $$0P:(DE-Juel1)VDB2595$$aWalter, A.$$b0$$uFZJ
000036047 245__ $$aTransitions in photosynthetic parameters of midvein and interveinal regions of leaves and their importance during leaf growth and development
000036047 260__ $$aOxford [u.a.] :Wiley- Blackwell$$bWiley-Blackwell - STM$$c2004
000036047 300__ $$a184 - 191
000036047 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000036047 440_0 $$010981$$aPlant Biology$$v6$$x1435-8603$$y2
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000036047 520__ $$aThe areal development of photosynthetic efficiency and growth patterns in expanding leaves of two different dicotyledonous species - Coccoloba uvifera and Sanchezia nobilis - was investigated by imaging both processes repeatedly over 32 days. Measurements were performed using combined imaging systems for chlorophyll fluorescence and growth, with the same spatial resolution. Significant differences in potential quantum yield of photosynthesis (F (v)/F (m)), a parameter indicating the functional status of photosystem II, were found between midvein and interveinal tissue. Although base-tip gradients and spatial patchiness were observed in the distribution of relative growth rate, neither midvein nor interveinal tissue showed such patterns in F (v)/F (m). In young leaves, F (v)/F (m) of the midvein was higher than F (v)/F (m) of interveinal tissue. This difference declined gradually with time, and upon cessation of growth, F (v)/F (m) of interveinal regions exceeded those of midvein tissue. Images of chlorophyll fluorescence quenching showed that DeltaF/F (m)' in the different tissues correlated with F (v)/F (m), indicating that, in these uniformly illuminated leaves, transitions in photosynthetic electron transport activity follow those of predawn quantum efficiency. We explore the implications of these observations during leaf development, discuss effects of sucrose delivery from veins to interveinal areas on relative rates of photosynthetic development in these tissues, and propose that the initially higher photosynthetic activity in the midvein compared to the intervein tissues may supply carbohydrates and energy for leaf growth processes.
000036047 536__ $$0G:(DE-Juel1)FUEK257$$2G:(DE-HGF)$$aChemie und Dynamik der Geo-Biosphäre$$cU01$$x0
000036047 588__ $$aDataset connected to Web of Science, Pubmed
000036047 650_2 $$2MeSH$$aAcanthaceae: growth & development
000036047 650_2 $$2MeSH$$aChlorophyll: metabolism
000036047 650_2 $$2MeSH$$aPhotosynthesis: physiology
000036047 650_2 $$2MeSH$$aPlant Leaves: anatomy & histology
000036047 650_2 $$2MeSH$$aPlant Leaves: growth & development
000036047 650_2 $$2MeSH$$aPolygonaceae: growth & development
000036047 650_7 $$01406-65-1$$2NLM Chemicals$$aChlorophyll
000036047 650_7 $$2WoSType$$aJ
000036047 65320 $$2Author$$achlorophyll fluorescence
000036047 65320 $$2Author$$aimaging
000036047 65320 $$2Author$$aspatio-temporal dynamics
000036047 65320 $$2Author$$apattern formation
000036047 65320 $$2Author$$aCoccoloba uvifera
000036047 65320 $$2Author$$aSanchezia nobilis
000036047 7001_ $$0P:(DE-HGF)0$$aRascher, U.$$b1
000036047 7001_ $$0P:(DE-HGF)0$$aOsmond, B.$$b2
000036047 773__ $$0PERI:(DE-600)2026390-9$$a10.1055/s-2004-817828$$gVol. 6, p. 184 - 191$$p184 - 191$$q6<184 - 191$$tPlant biology$$v6$$x1435-8603$$y2004
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000036047 9131_ $$0G:(DE-Juel1)FUEK257$$bEnvironment (Umwelt)$$kU01$$lChemie und Dynamik der Geo-Biosphäre$$vChemie und Dynamik der Geo-Biosphäre$$x0
000036047 9141_ $$y2004
000036047 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000036047 9201_ $$0I:(DE-Juel1)VDB49$$d31.12.2006$$gICG$$kICG-III$$lPhytosphäre$$x0
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