Skip Navigation


AOBPreview originally published online on July 15, 2005
Annals of Botany 2005 96(4):519-532; doi:10.1093/aob/mci207
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
96/4/519    most recent
mci207v1
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 (18)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by FELLE, H. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by FELLE, H. H.
Agricola
Right arrow Articles by FELLE, H. H.
Social Bookmarking
 Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?


© The Author 2005. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org


INVITED REVIEW

pH Regulation in Anoxic Plants

HUBERT H. FELLE*

Botanisches Institut I, Justus-Liebig-Universität Gießen, Senckenbergstraße 17, D-35390 Gießen, Germany

* E-mail Hubert.Felle{at}bio.uni-giessen.de

Received: 15 October 2004    Returned for revision: 10 December 2004    Accepted: 2 March 2005    Published electronically: 15 July 2005

Background pH regulation is the result of a complex interaction of ion transport, H+ buffering, H+-consuming and H+-producing reactions. Cells under anoxia experience an energy crisis; an early response thereof (in most tissues) is a rapid cytoplasmic acidification of roughly half a pH unit. Depending on the degree of anoxia tolerance, this pH remains relatively stable for some time, but then drops further due to an energy shortage, which, in concert with a general breakdown of transmembrane gradients, finally leads to cell death unless the plant finds access to an energy source.

Scope In this review the much-debated origin of the initial pH change and its regulation under anoxia is discussed, as well as the problem of how tissues deal with the energy crisis and to what extent pH regulation and membrane transport from and into the vacuole and the apoplast is a part thereof.

Conclusions It is postulated that, because a foremost goal of cells under anoxia must be energy production (having an anaerobic machinery that produces insufficient amounts of ATP), a new pH is set to ensure a proper functioning of the involved enzymes. Thus, the anoxic pH is not experienced as an error signal and is therefore not reversed to the aerobic level. Although acclimated and anoxia-tolerant tissues may display higher cytoplasmic pH than non-acclimated or anoxia-intolerant tissues, evidence for an impeded pH-regulation is missing even in the anoxia-intolerant tissues. For sufficient energy production, residual H+ pumping is vital to cope with anoxia by importing energy-rich compounds; however it is not vital for pH-regulation. Whereas the initial acidification is not due to energy shortage, subsequent uncontrolled acidosis occurring in concert with a general gradient breakdown damages the cell but may not be the primary event.

Key words: Acclimation, anoxia tolerance, anoxia intolerance, apoplast, buffering, co-transport, ethanol, flooding, hypoxia, lactate, biophysical pH-stat, biochemical pH stat, proton transport


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
ANN BOT (LOND)Home page
L. Magneschi and P. Perata
Rice Germination and Seedling Growth in the Absence of Oxygen
Ann. Bot., July 25, 2008; (2008) mcn121v1.
[Abstract] [Full Text] [PDF]


Home page
Plant CellHome page
C. Segonzac, J.-C. Boyer, E. Ipotesi, W. Szponarski, P. Tillard, B. Touraine, N. Sommerer, M. Rossignol, and R. Gibrat
Nitrate Efflux at the Root Plasma Membrane: Identification of an Arabidopsis Excretion Transporter
PLANT CELL, November 1, 2007; 19(11): 3760 - 3777.
[Abstract] [Full Text] [PDF]


Home page
J. Biol. Chem.Home page
W.-G. Choi and D. M. Roberts
Arabidopsis NIP2;1, a Major Intrinsic Protein Transporter of Lactic Acid Induced by Anoxic Stress
J. Biol. Chem., August 17, 2007; 282(33): 24209 - 24218.
[Abstract] [Full Text] [PDF]


Home page
J Exp BotHome page
H Aarnes, A. Eriksen, D Petersen, and F Rise
Accumulation of ammonium in Norway spruce (Picea abies) seedlings measured by in vivo 14N-NMR
J. Exp. Bot., March 1, 2007; 58(5): 929 - 934.
[Abstract] [Full Text] [PDF]


Home page
ANN BOT (LOND)Home page
H. H. FELLE
Apoplastic pH During Low-oxygen Stress in Barley
Ann. Bot., November 1, 2006; 98(5): 1085 - 1093.
[Abstract] [Full Text] [PDF]


Home page
J Exp BotHome page
M. A. Else, J. M. Taylor, and C. J. Atkinson
Anti-transpirant activity in xylem sap from flooded tomato (Lycopersicon esculentum Mill.) plants is not due to pH-mediated redistributions of root- or shoot-sourced ABA
J. Exp. Bot., September 1, 2006; 57(12): 3349 - 3357.
[Abstract] [Full Text] [PDF]


Home page
ANN BOT (LOND)Home page
H. GREENWAY, W. ARMSTRONG, and T. D. COLMER
Conditions Leading to High CO2 (>5 kPa) in Waterlogged-Flooded Soils and Possible Effects on Root Growth and Metabolism
Ann. Bot., July 1, 2006; 98(1): 9 - 32.
[Abstract] [Full Text] [PDF]


Home page
ANN BOT (LOND)Home page
M. B. JACKSON and T. D. COLMER
Response and Adaptation by Plants to Flooding Stress
Ann. Bot., September 1, 2005; 96(4): 501 - 505.
[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.