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The Arabidopsis thaliana aquaporin AtPIP1;2 is a physiologically relevant CO(2) transport facilitator.

Heckwolf, Marlies and Pater, Dianne and Hanson, David T. and Kaldenhoff, Ralf (2011):
The Arabidopsis thaliana aquaporin AtPIP1;2 is a physiologically relevant CO(2) transport facilitator.
In: The Plant journal : for cell and molecular biology, pp. 795-804, 67, (5), ISSN 1365-313X,
[Article]

Abstract

Cellular exchange of carbon dioxide (CO(2) ) is of extraordinary importance for life. Despite this significance, its molecular mechanisms are still unclear and a matter of controversy. In contrast to other living organisms, plants are physiologically limited by the availability of CO(2) . In most plants, net photosynthesis is directly dependent on CO(2) diffusion from the atmosphere to the chloroplast. Thus, it is important to analyze CO(2) transport with regards to its effect on photosynthesis. A mutation of the Arabidopsis thaliana AtPIP1;2 gene, which was characterized as a non-water transporting but CO(2) transport-facilitating aquaporin in heterologous expression systems, correlated with a reduction in photosynthesis under a wide range of atmospheric CO(2) concentrations. Here, we could demonstrate that the effect was caused by reduced CO(2) conductivity in leaf tissue. It is concluded that the AtPIP1;2 gene product limits CO(2) diffusion and photosynthesis in leaves.

Item Type: Article
Erschienen: 2011
Creators: Heckwolf, Marlies and Pater, Dianne and Hanson, David T. and Kaldenhoff, Ralf
Title: The Arabidopsis thaliana aquaporin AtPIP1;2 is a physiologically relevant CO(2) transport facilitator.
Language: English
Abstract:

Cellular exchange of carbon dioxide (CO(2) ) is of extraordinary importance for life. Despite this significance, its molecular mechanisms are still unclear and a matter of controversy. In contrast to other living organisms, plants are physiologically limited by the availability of CO(2) . In most plants, net photosynthesis is directly dependent on CO(2) diffusion from the atmosphere to the chloroplast. Thus, it is important to analyze CO(2) transport with regards to its effect on photosynthesis. A mutation of the Arabidopsis thaliana AtPIP1;2 gene, which was characterized as a non-water transporting but CO(2) transport-facilitating aquaporin in heterologous expression systems, correlated with a reduction in photosynthesis under a wide range of atmospheric CO(2) concentrations. Here, we could demonstrate that the effect was caused by reduced CO(2) conductivity in leaf tissue. It is concluded that the AtPIP1;2 gene product limits CO(2) diffusion and photosynthesis in leaves.

Journal or Publication Title: The Plant journal : for cell and molecular biology
Volume: 67
Number: 5
Divisions: 10 Department of Biology > Applied Plant Sciences
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10 Department of Biology
Date Deposited: 31 Aug 2011 11:55
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