K+ starvation inhibits water-stress-induced stomatal closure via ethylene synthesis in sunflower plants
The effect of water stress on stomatal closure in sunflower plants has been found to be dependent on K(+) nutrient status. When plants with different internal K(+) content were subjected to a water-stress period, stomatal conductance was reduced more markedly in plants with an adequate K(+) supply t...
| Veröffentlicht in: | Journal of experimental botany. - 1985. - 61(2010), 4 vom: 20. Feb., Seite 1139-45 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2010
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| Zugriff auf das übergeordnete Werk: | Journal of experimental botany |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Ethylenes Water 059QF0KO0R ethylene 91GW059KN7 Potassium RWP5GA015D |
| Zusammenfassung: | The effect of water stress on stomatal closure in sunflower plants has been found to be dependent on K(+) nutrient status. When plants with different internal K(+) content were subjected to a water-stress period, stomatal conductance was reduced more markedly in plants with an adequate K(+) supply than in K(+)-starved plants. K(+) starvation promoted the production of ethylene by detached leaves, as well as by the shoot of whole plants. Water stress had no significant effect on this synthesis. The effect on stomatal conductance of adding 5 microM cobalt (an ethylene synthesis inhibitor) to the growing medium of plants subjected to water stress was also dependent on their K(+) nutritional status: conductance was not significantly affected in normal K(+) plants whereas it was reduced in K(+)-starved plants. Cobalt had no harmful effects on growth, and did not alter the internal K(+) content in the plants. These results suggest that ethylene may play a role in the inhibiting effect of K(+) starvation on stomatal closure |
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| Beschreibung: | Date Completed 25.05.2010 Date Revised 21.11.2013 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1460-2431 |
| DOI: | 10.1093/jxb/erp379 |