NDLI: Osmotic stress decreases PIP aquaporin transcripts in barley roots but H2O2 is not involved in this process

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Acknowledgment

Journal of Plant Research : Volume 127, Issue 5, September 2014

Journal of Plant Research : Volume 127, Issue 4, July 2014

Journal of Plant Research : Volume 127, Issue 3, May 2014

Journal of Plant Research : Volume 127, Issue 2, March 2014

Journal of Plant Research : Volume 127, Issue 1, January 2014

Journal of Plant Research : Volume 126

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Osmotic stress decreases PIP aquaporin transcripts in barley roots but H2O2 is not involved in this process

Content Provider	Springer Nature Link
Author	Katsuhara, Maki Tsuji, buya Shibasaka, Mineo Panda, Sanjib Kumar
Copyright Year	2014
Abstract	Previous reports indicate that salt stress reduces the root hydraulic conductance and the expression of plasmamembrane-type aquaporins (PIPs). As a molecular mechanism for this phenomenon, the present study found evidence that the osmotic component, but probably not an ion-specific component, decreases PIP transcripts. Eight of ten PIP transcripts were reduced to less than half by 360 mM mannitol treatment for 12 h in comparison with control samples. A large decrease of HvPIP2;1 protein was also recorded. This reduction of both transcripts and proteins of HvPIP2s should be physiologically effective for preventing or reducing dehydration at an initial phase of severe salt/osmotic stress. Root cell sap osmolality increased from 278 to 372 mOsm 24 h after 360 mM mannitol treatment. These steps can secure survival and growth recovery with water reabsorption in barley. Our data also suggest that H2O2 seems not to be the main cause of osmotic stress-induced transcriptional down-regulation within the concentrations (20–500 μM) and time periods (24 h) examined, although H2O2 was previously proposed to be involved in the mechanisms of salinity/osmotic tolerance.
Starting Page	787
Ending Page	792
Page Count	6
File Format	PDF
ISSN	09189440
Journal	Journal of Plant Research
Volume Number	127
Issue Number	6
e-ISSN	16180860
Language	English
Publisher	Springer Japan
Publisher Date	2014-09-06
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Barley H2O2 Osmotic stress PIP aquaporin Salt stress Plant Sciences Plant Ecology Plant Physiology Plant Biochemistry
Content Type	Text
Resource Type	Article
Subject	Plant Science

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