The Hydraulic Conductivity Of Roots Of Rust-Infected Barley Seedlings

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dc.contributor.author Berryman, Ca en_US
dc.contributor.author Eamus, Derek en_US
dc.contributor.author Farrar, Jf en_US
dc.contributor.editor en_US
dc.date.accessioned 2011-02-07T06:20:09Z
dc.date.available 2011-02-07T06:20:09Z
dc.date.issued 1991 en_US
dc.identifier 2006012326 en_US
dc.identifier.citation Berryman Ca, Eamus Derek, and Farrar Jf 1991, 'The Hydraulic Conductivity Of Roots Of Rust-Infected Barley Seedlings', Academic Press Ltd, vol. 38, no. 6, pp. 407-415. en_US
dc.identifier.issn 0885-5765 en_US
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 en_US
dc.language en_US
dc.publisher Academic Press Ltd en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/S0885-5765(05)80109-2 en_US
dc.title The Hydraulic Conductivity Of Roots Of Rust-Infected Barley Seedlings en_US
dc.parent Physiological And Molecular Plant Pathology en_US
dc.journal.volume 38 en_US
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 060700 en_US
dc.personcode 0000033255 en_US
dc.personcode 000006 en_US
dc.personcode 0000033263 en_US
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
dc.description.keywords Abscisic-Acid; Water-Movement; Ion-Transport; Systems; Transpiration; Plant en_US
dc.staffid en_US


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