Skip Navigation

This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (15)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Bussis, D.
Right arrow Articles by Heineke, D.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Bussis, D.
Right arrow Articles by Heineke, D.
Agricola
Right arrow Articles by Bussis, D.
Right arrow Articles by Heineke, D.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Journal of Experimental Botany, Vol 49, 1349-1360, Copyright © 1998 by Oxford University Press

ARTICLES

Acclimation of potato plants to polyethylene glycol-induced water deficit I. Photosynthesis and metabolism

D Bussis, F Kauder and D Heineke
Albrecht-von-Haller Institut fur Pflanzenwissenschaften, Abteilung Biochemie der Pflanze, Untere Karspule 2, D-37073 Gottingen, Germany; Present address: Molecular Plant Physiology Group, Research School of Biological Sciences, Australian National University, PO Box 475, Canberra, ACT 2601, Australia; Corresponding author

The acclimation of photosynthesis and metabolism in response to water deficit is characterized using hydroponically grown potato plants (Solanum tuberosum cv. Désirée). Plants were subjected to a reduced water potential of the nutrient solution by adding 10% (w/v) PEG 6000. PEG-treated plants were retarded in growth. Leaves which had been fully developed before the PEG treatment and leaves grown during the PEG treatment showed different phenotypes and biochemical and physiological properties. Photosynthesis of all leaves decreased during the whole treatment. However, the decrease of photosynthesis in the two types of leaves had different causes indicated by differences in their metabolism. Leaves which were fully developed at the beginning of the PEG treatment began to wilt starting from the leaf rim. The apoplastic ABA content increased, coinciding with a decreased stomatal conductance. Increased energy charge of the cells indicated impaired chloroplastic metabolism, accompanied by a decrease of amounts of chloroplastic enzymes. The apoplastic and the symplastic ABA content were increased during water deficit and because ABA was concentrated in the cytosolic compartment it is suggested that ABA is involved in decreasing photosynthetic enzyme contents in old leaves. Young leaves, grown after the imposition of water deficit, were smaller than control leaves and had a curly surface. In young leaves apoplastic and cytosolic ABA contents were identical with control values. Carboxylation efficiency of photosynthesis was decreased, but the water use efficiency remained unchanged. Metabolic data of the photosynthetic pathways indicate a down-regulation of chloroplastic metabolism. It is concluded that in young leaves photosynthesis was non-stomatally limited. This limitation was not caused by ABA.Keywords: Abscisic acid, potato, water stress
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 J Exp BotHome page
F. Kauder, F. Ludewig, and D. Heineke
Ontogenetic changes of potato plants during acclimation to elevated carbon dioxide
J. Exp. Bot., February 1, 2000; 51(90001): 429 - 437.
[Abstract] [Full Text]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.