The response of vine leaf photosynthesis to shoot tip excision and stem cincturing
DOI:
https://doi.org/10.5073/vitis.1972.11.193-197Abstract
The photosynthetic activity of mature leaves on glasshouse grown vines was measured in the laboratory 7-8 days after applying 4 treatments designed to vary the plant's demand for assimilates. These comprised shoot tip excision, stem cincturing and a combination of the two. The elimination of roots as an effective sink for assimilate led to assimilate build-up in leaves and caused a consistent reduction in photosynthesis, compared to control vines, regardless of whether shoot tips had been retained or previously excised. Excision of shoot tips did not elicit a consistent, photosynthetic response in remaining leaves.
Der Einfluß des Gipfelns und Ringelns auf die Photosynthese des Rebenlaubes
Um den Assimilatbedarf von Reben zu verändern, wurden die Triebspitzen von Gewächshauspflanzen gegipfelt, die Triebe geringelt oder beide Eingriffe kombiniert vorgenommen. 7-8 Tage danach wurde die Photosyntheseaktivität reifer Blätter im Labor gemessen. Die Ausschaltung der Wurzeln als wichtiges ,,sink" führte zur Anhäufung von Assimilaten in den Blättern und verursachte in -Obereinstimmung damit einen Rückgang der Photosynthese gegenüber den unbehandelten Reben, unabhängig davon, ob die Triebspitzen vorher entfernt worden waren oder nicht. Eine entsprechende Wirkung auf die Photosynthese der verbliebenen Blätter wurde durch das Gipfeln nicht hervorgerufen.
Downloads
Published
Issue
Section
License
The content of VITIS is published under a Creative Commons Attribution 4.0 license. Any user is free to share and adapt (remix, transform, build upon) the content as long as the original publication is attributed (authors, title, year, journal, issue, pages) and any changes to the original are clearly labeled. We do not prohibit or charge a fee for reuse of published content. The use of general descriptive names, trade names, trademarks, and so forth in any publication herein, even if not specifically indicated, does not imply that these names are not protected by the relevant laws and regulations. The submitting author agrees to these terms on behalf of all co-authors when submitting a manuscript. Please be aware that this license cannot be revoked. All authors retain the copyright on their work and are able to enter into separate, additional contractual arrangements.