Advanced

Experimental demonstration of floral allocation costs in Crepis tectorum

Andersson, Stefan LU (2006) In Canadian Journal of Botany 84(6). p.904-909
Abstract
Information on floral resource costs is fundamental for understanding how selection operates on floral morphology. In this study, I explored the cost of maturing flowers in a self-incompatible population of the ligulate composite Crepis tectorum L. by experimentally manipulating floral investment and then monitoring the response in reproductive effort. Plants on which the heads were removed during the initial stage of ligule expansion had a higher reproductive effort than plants whose heads were removed immediately after flower maturation, and the latter plants had a higher reproductive effort than plants on which all flowers were permitted to set fruit. Judging from biomass estimates and the magnitude of the observed tradeoffs, the amount... (More)
Information on floral resource costs is fundamental for understanding how selection operates on floral morphology. In this study, I explored the cost of maturing flowers in a self-incompatible population of the ligulate composite Crepis tectorum L. by experimentally manipulating floral investment and then monitoring the response in reproductive effort. Plants on which the heads were removed during the initial stage of ligule expansion had a higher reproductive effort than plants whose heads were removed immediately after flower maturation, and the latter plants had a higher reproductive effort than plants on which all flowers were permitted to set fruit. Judging from biomass estimates and the magnitude of the observed tradeoffs, the amount of resources allocated to maturing flowers was about half as great as the amount of resources devoted to fruit maturation. These and other results suggest that floral tradeoffs may exert negative selection on floral size variables. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Canadian Journal of Botany
volume
84
issue
6
pages
904 - 909
publisher
Canadian Science Publishing, NRC Research Press
external identifiers
  • wos:000239654800003
  • scopus:33750581081
ISSN
0008-4026
DOI
10.1139/B06-041
language
English
LU publication?
yes
id
ff49dbf0-11e1-4913-92c1-840361718c71 (old id 162577)
date added to LUP
2007-07-02 08:06:42
date last changed
2019-05-14 02:11:34
@article{ff49dbf0-11e1-4913-92c1-840361718c71,
  abstract     = {Information on floral resource costs is fundamental for understanding how selection operates on floral morphology. In this study, I explored the cost of maturing flowers in a self-incompatible population of the ligulate composite Crepis tectorum L. by experimentally manipulating floral investment and then monitoring the response in reproductive effort. Plants on which the heads were removed during the initial stage of ligule expansion had a higher reproductive effort than plants whose heads were removed immediately after flower maturation, and the latter plants had a higher reproductive effort than plants on which all flowers were permitted to set fruit. Judging from biomass estimates and the magnitude of the observed tradeoffs, the amount of resources allocated to maturing flowers was about half as great as the amount of resources devoted to fruit maturation. These and other results suggest that floral tradeoffs may exert negative selection on floral size variables.},
  author       = {Andersson, Stefan},
  issn         = {0008-4026},
  language     = {eng},
  number       = {6},
  pages        = {904--909},
  publisher    = {Canadian Science Publishing, NRC Research Press},
  series       = {Canadian Journal of Botany},
  title        = {Experimental demonstration of floral allocation costs in Crepis tectorum},
  url          = {http://dx.doi.org/10.1139/B06-041},
  volume       = {84},
  year         = {2006},
}