Hartung, W. and Zhang, J. H. and Davies, W. J. (1994) Does abscisic acid play a stress physiological role in maize plants growing in heavily compacted soil ? Journal of Experimental Botany, 45 (2). pp. 221-226. ISSN 1460-2431Full text not available from this repository.
When roots of young maize seedlings are forced to penetrate soil of high mechanical impedance, abscisic acid (ABA) concentration in the xylem sap can be increased by up to 10-fold. After a further 8-10 d, however, this increase disappears nearly completely. Leaf growth rate was inhibited in plants in compacted soil and showed a good relationship with ABA concentration in the xylem. The early large increase of ABA in xylem coincided with the reduction of leaf water potential and turgor which also gradually disappeared when plants became established. With only one layer of compacted soil in the middle of the soil profile, a similar situation to that in compacted field plots, plant leaf growth was not affected as long as the soil was well watered.
|Journal or Publication Title:||Journal of Experimental Botany|
|Uncontrolled Keywords:||Mechanical impedance ; Root ; Compaction ; Soils ; Growth ; Water potential ; Turgor ; Morphological change ; Plant leaf ; Zea mays ; Abscisic acid ; Gramineae ; Monocotyledones ; Angiospermae ; Spermatophyta ; Stress ; Cereal crop ; Sesquiterpenes ; Plant growth substance|
|Subjects:||G Geography. Anthropology. Recreation > GE Environmental Sciences|
|Departments:||Faculty of Science and Technology > Lancaster Environment Centre|
|Deposited On:||30 Jan 2009 09:43|
|Last Modified:||22 Jul 2016 01:04|
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