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New aspects of plant aquaporin regulation and specificity

Authors :
Ralf Kaldenhoff
Alexander Biela
Franka Siefritz
Martin Eckert
Source :
Journal of Experimental Botany. 50:1541-1545
Publication Year :
1999
Publisher :
Oxford University Press (OUP), 1999.

Abstract

meability of these channel proteins for water (Preston et al., 1992). Recent findings concerning the sensitivity of aqua- For a long time, plant physiologists, on the other hand, porins to heavy metal ions and their possible con- have not accepted the requirement of these molecules for sequences to plant physiology are discussed. the simple reason that the majority of plants do not Furthermore, results obtained from heterologous possess organs or sites where comparable tremendous expression of plant aquaporin cRNAs in Xenopus amounts of water are transported through living cells. It oocytes are related to the situation in the plant. An was assumed that the water permeability of a biomemassessment of the significance of water flux regulation brane itself is suYcient for the requirements of plant by modification of the aquaporin protein or change cellular water movement (Fettiplace and Haydon, 1980; of gene activity is given and new data concerning Cullis et al., 1996). Since the counterparts of AQP1 were the selectivity of plasma membrane aquaporins are identified in the plant plasma membrane and tonoplast, presented. this opinion is questioned. To date the existence of aquaporins in virtually all living organisms, including

Details

ISSN :
14602431 and 00220957
Volume :
50
Database :
OpenAIRE
Journal :
Journal of Experimental Botany
Accession number :
edsair.doi...........b4b4f21e609a93783408d8af626ed4dd
Full Text :
https://doi.org/10.1093/jxb/50.339.1541