Skip Navigation

This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
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 (7)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Schmidt, W.
Right arrow Articles by Steinbach, S.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Schmidt, W.
Right arrow Articles by Steinbach, S.
Agricola
Right arrow Articles by Schmidt, W.
Right arrow Articles by Steinbach, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Annals of Botany 86: 589-593, 2000
© 2000 Annals of Botany Company

Sensing Iron—A Whole Plant Approach

Wolfgang Schmidt+ and Stefanie Steinbach

Carl von Ossietzky Universität Oldenburg, Fachbereich Biologie, 26111 Oldenburg, Postfach, 2503, Germany

Received: 12 April 2000 ; Returned for revision: 10 May 2000 . Accepted: 1 June 2000

Regulatory mechanisms leading to cellular Fe homeostasis were investigated inPlantago (Plantago lanceolata L.) plants grown hydroponically at different temperature regimes either in the presence or absence of iron. During the experimental period of 6 d, growth was not affected by Fe availability, but was decreased by lowering the root zone temperature (RZT) from 24 to 12°C. Cultivating plants at low RZT decreased the reduction activity for ferric chelates in Fe-deficient plants. In the presence of iron, the temperature regime did not affect Fe accumulation by root cells, but decreased translocation of Fe to the shoot, and chlorosis of young leaves was observed at suboptimal RZT. Under these conditions root-mediated reduction of ferric chelates was increased. In cold-treated plants this effect was specific to Fe and could not be evoked by Mn2+and Zn + 2additions. Supplementing the medium with the ferrous scavenger ferrozine caused a further enhancement in reduction rates, probably due to mobilization of apoplastic Fe. These results can be explained plausibly if different sites of Fe sensing are postulated and if it is assumed that both the absence and presence of iron could be a signal increasing root reduction activity. Copyright 2000 Annals of Botany Company

Adaptation, iron uptake regulation, ferric reduction, Plantago lanceolata, root zone temperature, whole plant signalling


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
B. G. Forde
The role of long-distance signalling in plant responses to nitrate and other nutrients
J. Exp. Bot., January 1, 2002; 53(366): 39 - 43.
[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.