Detecting canalization and intra-floral modularity in triggerplant (Stylidium) flowers: correlations are only part of the story
Research output: Contribution to journal › Article › peer-review
Methods - Floral and inflorescence structures of ten species of triggerplants (Stylidium, Stylidiaceae) in southwestern Australia were measured; the data were analyzed using multivariate and bivariate approaches to detect modular structure of floral and non-floral traits and assess evidence for canalization of PMTs.
Key Results - Only six of the ten species had PMTs with smaller correlations coefficients than attraction traits, in contrast to the Berg expectation. However, allometric and variance patterns were generally consistent with the predictions of an extended Berg hypothesis and adaptive accuracy. There was modular separation of floral from non-floral traits and clear intra-floral modular structure. PMTs showed lower proportional variation and shallower allometric slopes than pollinator-attraction traits in nine and eight, respectively, of ten species.
Conclusions - This study demonstrates the value of allometric and variance analyses (as opposed to correlation) in assessing the evolutionary significance of floral-trait stability and plasticity.
|Journal||Annals of Botany|
|Early online date||31 Oct 2018|
|Publication status||Published - 23 Jan 2019|
- Canalization and Intra-floral allometry-postprint
Rights statement: This is a pre-copyedited, author-produced version of an article accepted for publication in Annals of Botany following peer review. The version of record W Scott Armbruster, Juliet A Wege; Detecting canalization and intra-floral modularity in triggerplant (Stylidium) flowers: correlations are only part of the story, Annals of Botany, Volume 123, Issue 2, 23 January 2019, Pages 355–372 is available online at: https://doi.org/10.1093/aob/mcy184.
Accepted author manuscript (Post-print), 2.71 MB, PDF document