Effect of partial root excision on shoot water relations
Removing 4 out of 5 serminal roots from 7-day-old wheat seedlings arrested leaf elongation for 1.5 h. This effect can be explained by an initial decrease in foliar water content resulting from the smaller root surface area available for water uptake. Subsequently, leaf hydration increased with time...
| Veröffentlicht in: | Journal of plant physiology. - 1979. - 160(2003), 9 vom: 01. Sept., Seite 1011-5 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2003
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| Zugriff auf das übergeordnete Werk: | Journal of plant physiology |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Indoleacetic Acids Water 059QF0KO0R indoleacetic acid 6U1S09C61L |
| Zusammenfassung: | Removing 4 out of 5 serminal roots from 7-day-old wheat seedlings arrested leaf elongation for 1.5 h. This effect can be explained by an initial decrease in foliar water content resulting from the smaller root surface area available for water uptake. Subsequently, leaf hydration increased with time and came to equal that of intact plants within 2 h. The rehydration was seemingly effected by an increasing conductivity of the one remaining root axis, since transpiration of the partially de-rooted plants did not fall below that of controls. With time, leaf elongation resumed, but at a slower rate than in intact plants. This slower growth may be attributed to a decrease in leaf extensibility since this was found to be reduced when measured by a counterweight technique involving linear displacement transducers. Loss of extensibility was associated with decreased IAA concentration in the leaf elongation zone |
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| Beschreibung: | Date Completed 09.02.2004 Date Revised 30.09.2020 published: Print Citation Status MEDLINE |
| ISSN: | 1618-1328 |