Plasma membrane NADH oxidase of maize roots responds to gravity and imposed centrifugal forces
c2001 Editions scientifiques et medicales Elsevier SAS.
| Veröffentlicht in: | Plant physiology and biochemistry : PPB. - 1991. - 39(2001), 6 vom: 25. Juni, Seite 487-94 |
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| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2001
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| Zugriff auf das übergeordnete Werk: | Plant physiology and biochemistry : PPB |
| Schlagworte: | Journal Article Research Support, U.S. Gov't, Non-P.H.S. NASA Discipline Cell Biology Non-NASA Center Herbicides Multienzyme Complexes 2,4-Dichlorophenoxyacetic Acid 2577AQ9262 NADH oxidase EC 1.6.- |
| Zusammenfassung: | c2001 Editions scientifiques et medicales Elsevier SAS. NADH oxidase activities measured with excised roots of dark-grown maize (Zea mays) seedlings and with isolated plasma membrane vesicles from roots of dark-grown maize oscillated with a regular period length of 24 min and were inhibited by the synthetic auxin 2,4-dichlorophenoxyacetic [correction of dichorophenoxyacetic] acid. The activities also responded to orientation with respect to gravity and to imposed centrifugal forces. Turning the roots upside down resulted in stimulation of the activity with a lag of about 10 min. Returning the sections to the normal upright position resulted in a return to initial rates. The activity was stimulated reversibly to a maximum of about 2-fold with isolated plasma membrane vesicles, when subjected to centrifugal forces of 25 to 250 x g for 1 to 4 min duration. These findings are the first report of a gravity-responsive enzymatic activity of plant roots inhibited by auxin and potentially related to the gravity-induced growth response |
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| Beschreibung: | Date Completed 15.08.2002 Date Revised 30.09.2020 published: Print Citation Status MEDLINE |
| ISSN: | 1873-2690 |