Long-distance signalling from roots to shoots assessed : the flooding story
Several kinds of signal may be generated when roots are exposed to an environmental stress. Some, but not all, are conveyed to shoots in the transpiration stream. Principles are summarized that may help establish experimentally the presence or intensity of root signals transported by transpiration....
| Veröffentlicht in: | Journal of experimental botany. - 1985. - 53(2002), 367 vom: 21. Feb., Seite 175-81 |
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| 1. Verfasser: | |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2002
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| Zugriff auf das übergeordnete Werk: | Journal of experimental botany |
| Schlagworte: | Journal Article Review Water 059QF0KO0R |
| Zusammenfassung: | Several kinds of signal may be generated when roots are exposed to an environmental stress. Some, but not all, are conveyed to shoots in the transpiration stream. Principles are summarized that may help establish experimentally the presence or intensity of root signals transported by transpiration. In many dryland species, flooding of the soil induces developmental responses in the shoot such as epinastic leaf curvature, stomatal closure and slowing of leaf expansion. These reactions compensate for diminished input of resources from the roots. They lend themselves to the study of root-to-shoot signalling by commencing after a time lag of only a few hours, by persisting for several days and by being highly reproducible. Evidence implicating chemical and hydraulic signals in promoting stomatal closure and epinastic curvature in flooded plants is reviewed. Further progress will depend upon examining a wider range of putative signals, accounting for any interactions between them and improving methods for the evaluation of signal durability in transit, and effectiveness at target sites |
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| Beschreibung: | Date Completed 26.04.2002 Date Revised 07.12.2022 published: Print Citation Status MEDLINE |
| ISSN: | 1460-2431 |