Stomatal response of hybrid poplar to incident light, sudden darkening and leaf excision
Identifieur interne : 001838 ( Main/Merge ); précédent : 001837; suivant : 001839Stomatal response of hybrid poplar to incident light, sudden darkening and leaf excision
Auteurs : Reinhart Ceulemans [Belgique] ; T. M. Hinckley [États-Unis] ; I. Impens [Belgique]Source :
- Physiologia Plantarum [ 0031-9317 ] ; 1989-02.
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Abstract
Responses of abaxial and adaxial stomata of Populus trichocarpa Torr. & Gray. × P. deltoides Bartr. (ex Marsh.) cv. Unal to incident light, sudden darkening and leaf excision in the light and in the dark were studied on 5‐year‐old trees in the field using diffusion porometry. Stomatal closure in the dark was found to be incomplete in most cases studies. Stomata closed after leaf excision in the dark within 90 min. Stomatal closure after darkening of an entire tree or an entire branch (white the rest of the tree was in the light) was slower, and complete stomatal closure was noticed only for adaxial stomata after 3 h. Adaxial stomata were more reactive and sensitive than abaxial stomata to sudden darkening and leaf excision in the light and the dark. In all treatments, stomatal response was more responsive in mature leaves than in young, still expanding leaves.
Url:
DOI: 10.1111/j.1399-3054.1989.tb06165.x
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