Defoliation, Photosynthetic Rates, and Assimilate Transport in Grapevine Plants

Defoliation, Photosynthetic Rates, and Assimilate Transport in Grapevine Plants The source-sink relations in grapevine (Vitis vinifera L., var. Rkatsiteli) plants were disturbed by defoliation at different stages of vegetative growth in order to investigate changes in photosynthetic activity and assimilate partitioning. Defoliation was shown to stimulate photosynthesis in the remaining source leaves, enhance the assimilate export, and diminish the midday suppression of photosynthesis. Defoliation created a powerful sink for assimilates, and stimulated their delivery to the affected zone. It is hypothesized that defoliation-induced stress is accompanied by a substantial enhancement of photosynthetic activity and by redistribution of assimilate flows, which enables a sustained supply of assimilates to the sink organs of grapevine plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Defoliation, Photosynthetic Rates, and Assimilate Transport in Grapevine Plants

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Publisher
Nauka/Interperiodica
Copyright
Copyright © 2005 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1007/s11183-005-0066-x
Publisher site
See Article on Publisher Site

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