The hydraulic conductivity of roots of rust-infected barley seedlings

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dc.contributor.author Berryman, CA
dc.contributor.author Eamus, D
dc.contributor.author Farrar, JF
dc.date.accessioned 2011-02-07T06:20:09Z
dc.date.issued 1991
dc.identifier.citation Physiological and Molecular Plant Pathology, 1991, 38 (6), pp. 407 - 415
dc.identifier.issn 0885-5765
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/13248
dc.description.abstract The influence of Puccinia hordei (rust) infection on the root hydraulic conductivity (Lp) of excised roots of Hordeum distichum cv. Maris Mink (barley) was investigated using the Scholander pressure chamber technique. The solute potential of the root exudate was also measured to determine the contribution of the osmotic component to the total driving force for water flow across the roots. The root Lp of infected plants was significantly lower than control plants on days 5, 6 and 7 after infection. On days 4 and 8 after infection, Lp did not differ significantly. Root Lp increased with time for both control and infected plants from days 5 to 8 after infection. Root Lp varied between 1·4 and 3·6 × 10-5 cm s-1 MPa-1 for roots of infected plants, and between 2·3 and 4·0 × 10-5 cm s-1 MPa-1 for control plants. The solute potential of root xylem sap exudate was significantly higher (less negative) than that of control sap on days 6, 7 and 8 after infection, reflecting a decrease in the transport of solutes into the root xylem of roots of diseased plants. In control and infected plants, as the applied pressure increased, solute potential root exudate increased. These results are discussed in relation to the known susceptibility of rust infected plants to drought and the mechanisms by which rust infection increases such susceptibility. © 1991 Academic Press Limited.
dc.language eng
dc.relation.isbasedon 10.1016/S0885-5765(05)80109-2
dc.title The hydraulic conductivity of roots of rust-infected barley seedlings
dc.type Journal Article
dc.parent Physiological and Molecular Plant Pathology
dc.journal.volume 6
dc.journal.volume 38
dc.journal.number 6 en_US
dc.publocation London en_US
dc.identifier.startpage 407 en_US
dc.identifier.endpage 415 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 0607 Plant Biology
dc.personcode 000006
dc.percentage 100 en_US
dc.classification.name Plant Biology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
pubs.consider-herdc false
utslib.collection.history School of the Environment (ID: 344)
utslib.collection.history Closed (ID: 3)
utslib.collection.history School of the Environment (ID: 344)
utslib.collection.history School of the Environment (ID: 344)


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