start-ver=1.4
cd-journal=joma
no-vol=456
cd-vols=
no-issue=4
article-no=
start-page=687
end-page=691
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2008
dt-pub=20080626
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Barley plasma membrane intrinsic proteins (PIP aquaporins) as water and CO2 transporters
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=<p>We identified barley aquaporins and demonstrated that one, HvPIP2;1, transports water and CO2. Regarding water homeostasis in plants, regulations of aquaporin expression were observed in many plants under several environmental stresses. Under salt stress, a number of plasma membrane-type aquaporins were down-regulated, which can prevent continuous dehydration resulting in cell death. The leaves of transgenic rice plants that expressed the largest amount of HvPIP2;1 showed a 40% increase in internal CO2 conductance compared with leaves of wild-type rice plants. The rate of CO2 assimilation also increased in the transgenic plants. The goal of our plant aquaporin research is to determine the key aquaporin species responsible for water and CO2 transport, and to improve plant water relations, stress tolerance, CO2 uptake or assimilation, and plant productivity via molecular breeding of aquaporins.</p>

en-copyright=
kn-copyright=

en-aut-name=KatsuharaMaki
en-aut-sei=Katsuhara
en-aut-mei=Maki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=HanbaYuko T.
en-aut-sei=Hanba
en-aut-mei=Yuko T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=Research Institute for Bioresources, Okayama University

affil-num=2
en-affil=
kn-affil=Center for Bioresource Field Science, Kyoto Institute of Technology
en-keyword=barley
kn-keyword=barley
en-keyword=CO2
kn-keyword=CO2
en-keyword=plant aquaporins
kn-keyword=plant aquaporins
en-keyword=salt stress
kn-keyword=salt stress
en-keyword=water transport
kn-keyword=water transport
END