Anmelden/Registrieren
Zurück zur geteilten Ansicht
Verfasser Titel Jahr
zeige Details Heber, U., Neimanis, S., ... Stomatal aperture, photosythesis and water fluxes in mesophyll cells as affected by the abscission of leaves. Simultaneous measurements of gas exchange, light scattering and...
in: Planta , ISSN 1432-2048, Vol. 167 (4. 1986), p. 554-562
Zugang: zum Volltext
ähnliche Vorschläge
1986
Abstract Carbon dioxide exchange, transpiration, chlorophyll fluorescence and light scattering of leaves of Lycopersicom esculentum, Helianthus annuus and Arbutus unedo were measured simultaneously before and after abscission of leaves. Scattering of a weak green measuring beam was used to monitor water fluxes across the thylakoid membranes of the mesophyll. When leaves were cut under water, stomata initially closed partially and then occasionally exhibited distinct regulatory oscillations. As stomata closed, light scattering decreased indicating water influx into the mesophyll. Stomatal oscillations were accompanied, with small but noticeable phase shifts, by oscillations of water fluxes at the thylakoid level. These fluxes could be distinguished from the water fluxes accompanying light-dependent ion pumping across the thylakoids by the concomitant chlorophyll fluorescence signals. The latter record energy-dependent ion fluxes in addition to redox changes of the electron-transport chain. As stomata closed partially after cutting a leaf under water, photosynthesis decreased. In Arbutus unedo and Helianthus annuus leaves, transient stomatal closure was insufficient to account for transient inhibition of photosynthesis which appeared to be brought about by transfer of an inhibitory solute through the petiole into the mesophyll. This solute also stimulated respiration in the dark. When leaves were cut in air, stomata opened transiently (Iwanoff effect) before wilting enforced closure. Photosynthesis followed the stomatal responses, increasing during opening and decreasing during closure.
Copyright: Copyright 1986 Springer-Verlag
beteiligte Personen: Heber, U. , Neimanis, S. , Lange, O. L.
Format: Elektronisch
Erschienen: 1986.
Serie: Springer Online Journal Archives 1860-2000 [Dig. Serial]
Schlagwörter:
URL: http://dx.doi.org/10.1007/BF00391232

Ähnliche Vorschläge

Zurück zur geteilten Ansicht
Verfasser Titel Jahr
zeige Details Muschak, Michael, Willmitzer, Lothar, ... Gas-exchange analysis of chloroplastic fructose-1,6-bisphosphatase antisense potatoes at different air humidities and at elevated CO2
in: Planta , ISSN 1432-2048, Vol. 209 (1. 1999), p. 104-111
Zugang: zum Volltext
ähnliche Vorschläge
1999
zeige Details Long, S. P., Farage, P. K., ... Separating the contribution of the upper and lower mesophyll to photosynthesis in Zea mays L. leaves
in: Planta , ISSN 1432-2048, Vol. 177 (2. 1989), p. 207-216
Zugang: zum Volltext
ähnliche Vorschläge
1989
zeige Details Nonami, Hiroshi, Schulze, E.-D. Cell water potential, osmotic potential, and turgor in the epidermis and mesophyll of transpiring leaves
in: Planta , ISSN 1432-2048, Vol. 177 (1. 1989), p. 35-46
Zugang: zum Volltext
ähnliche Vorschläge
1989
zeige Details Schapendonk, A. H. C. M., Spitters, C. J. T., ... Effects of water stress on photosynthesis and chlorophyll fluorescence of five potato cultivars
in: Potato research , ISSN 1871-4528, Vol. 32 (1. 1989), p. 17-32
Zugang: zum Volltext
ähnliche Vorschläge
1989
zeige Details Maier-Maercker, Uta, Koch, Werner Poor stomatal control of water balance and the abscission of green needles from a declining stand of spruce trees [Picea abies (L.) Karst.] from the northern Alps
in: Trees , ISSN 1432-2285, Vol. 10 (2. 1995), p. 63-73
Zugang: zum Volltext
ähnliche Vorschläge
1995