Aspen Bibliography

Transpiration capacity of dormant buds of forest trees

Document Type

Article

Journal/Book Title/Conference

Botanical Gazette

Volume

125

Issue

3

First Page

207

Last Page

211

Publication Date

1964

Abstract

Experiments were conducted on transpiration capacity of excised dormant buds of trembling aspen (Populus tremuloides Michx.), white birch (Betula papyrifera Marsh.), red pine (Pinus resinosa Ait.), white pine (P. strobus L.), and jack pine (P. banksiana Lamb.). The bases of the buds were fixed in Petri dishes containing parawax and paraffin oil. Bud transpiration was determined gravimetrically under a range of temperatures and relative humidities. Bud transpiration of all species was responsive to changes in vapor-pressure gradients from the bud surface to the surrounding atmosphere. Large species differences were found in bud transpiration. Water loss among the pines was in the following order: white pine > red pine > jack pine. Vegetative buds of Populus tremuloides transpired faster than flower buds. Bud transpiration did not correlate well with bud size or surface development.

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