Skip Navigation


JXB Advance Access originally published online on September 18, 2006
Journal of Experimental Botany 2006 57(14):3727-3735; doi:10.1093/jxb/erl131
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
57/14/3727    most recent
erl131v1
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 Similar articles in PubMed
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 (7)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Liu, F.
Right arrow Articles by Jensen, C. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Liu, F.
Right arrow Articles by Jensen, C. R.
Agricola
Right arrow Articles by Liu, F.
Right arrow Articles by Jensen, C. R.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author [2006]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

RESEARCH PAPER

Physiological responses of potato (Solanum tuberosum L.) to partial root-zone drying: ABA signalling, leaf gas exchange, and water use efficiency

Fulai Liu1,*, Ali Shahnazari1, Mathias N. Andersen2, Sven-Erik Jacobsen1 and Christian R. Jensen1

1The Royal Veterinary and Agricultural University, Department of Agricultural Sciences, Crop Science, Højbakkegaard Allé 13, DK-2630 Taastrup, Denmark
2Department of Agroecology, Danish Institute of Agricultural Sciences, Research Centre Foulum, PO Box 50, DK-8830 Tjele, Denmark

* To whom correspondence should be addressed. E-mail: fl{at}kvl.dk

The physiological responses of potato (Solanum tuberosum L. cv. Folva) to partial root-zone drying (PRD) were investigated in potted plants in a greenhouse (GH) and in plants grown in the field under an automatic rain-out-shelter. In the GH, irrigation was applied daily to the whole root system (FI), or to one-half of the root system while the other half was dried, for 9 d. In the field, the plants were drip irrigated either to the whole root system near field capacity (FI) or using 70% water of FI to one side of the roots, and shifted to the other side every 5–10 d (PRD). PRD plants had a similar midday leaf water potential to that of FI, whereas in the GH their root water potential ({Psi}r) was significantly lowered after 5 d. Stomatal conductance (gs) was more sensitive to PRD than photosynthesis (A) particularly in the field, leading to greater intrinsic water use efficiency (WUE) (i.e. A/gs) in PRD than in FI plants on several days. In PRD, the xylem sap abscisic acid concentration ([ABA]xylem) increased exponentially with decreasing {Psi}r; and the relative [ABA]xylem (PRD/FI) increased exponentially as the fraction of transpirable soil water (FTSW) in the drying side decreased. In the field, the leaf area index was slightly less in PRD than in FI treatment, while tuber biomass was similar for the two treatments. Compared with FI, PRD treatment saved 30% water and increased crop water use efficiency (WUE) by 59%. Restrictions on leaf area expansion and gs by PRD-induced ABA signals might have contributed to reduced water use and increased WUE.

Key words: Abscisic acid, leaf area, partial root-zone drying, potato, stomatal conductance, water use efficiency


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
 Tree PhysiolHome page
B. Aganchich, S. Wahbi, F. Loreto, and M. Centritto
Partial root zone drying: regulation of photosynthetic limitations and antioxidant enzymatic activities in young olive (Olea europaea) saplings
Tree Physiol, May 1, 2009; 29(5): 685 - 696.
[Abstract] [Full Text] [PDF]


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.