You are here: Home
/ Publication Information
Title: Shoot Morphogenesis Associated With Flowering in Populus deltoides (Salicaceae)
Author: Yuceer, Cetin; Land, Samuel B.; Kubiske, Mark E.; Harkess, Richard L.;
Source: American Journal of Botany 90(2):196-206
Publication Series: Scientific Journal (JRNL)
Description: Temporal and spatial formation and differentiation of axillary buds in developing shoots of mature eastern cottonwood (Populus deltoides) were investigated. Shoots sequentially initiate early vegetative, floral, and late vegetative buds. Associated with these buds is the formation of three distinct leaf types. In May of the first growing season, the first type begins forming in terminal buds and overwinters as relatively developed foliar structures. These leaves bear early vegetative buds in their axils. The second type forms late in the first growing season in terminal buds. These leaves form floral buds in their axils the second growing season. The floral bud meristems initiate scale leaves in April and begin forming floral meristems in the axils of the bracts in May. The floral meristems subsequentty form floral organs by the end of the second growing season. The floral buds overwinter with floral organs, and anthesis occurs in the third growing season. The third type of leaf forms and develops entirely outside the terminal buds in the second growing season. These leaves bear the late vegetative buds in their axils. On the basis of these and other supporting data, we hypothesize a 3-yr flowering cycle as opposed to the traditional 2-yr cycle in eastern cottonwood.
Keywords: bud differentiation, eastern cottonwood, Populus deltoides, Salicaceae
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
XML: View XML
Yuceer, Cetin; Land, Samuel B.; Kubiske, Mark E.; Harkess, Richard L. 2003. Shoot Morphogenesis Associated With Flowering in Populus deltoides (Salicaceae). American Journal of Botany 90(2):196-206
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility