Reaction norms of Arabidopsis. I. Plasticity of characters and correlations across water, nutrient and light gradients
Article first published online: 11 DEC 2002
Journal of Evolutionary Biology
Volume 8, Issue 4, pages 421–438, July 1995
How to Cite
Pigliucci, M., Whitton, J. and Schlichting, C. D. (1995), Reaction norms of Arabidopsis. I. Plasticity of characters and correlations across water, nutrient and light gradients. Journal of Evolutionary Biology, 8: 421–438. doi: 10.1046/j.1420-9101.1995.8040421.x
- Issue published online: 11 DEC 2002
- Article first published online: 11 DEC 2002
- Received 21 September 1994; accepted 5 January 1995.
- Cited By
- Arabidopsis thaliana;
- Phenotypic plasticity;
- reaction norms;
- environmental gradients;
- path analysis
The univariate and multivariate study of variation for phenotypic plasticity is central to providing a clear understanding of hypotheses about the genetic control and evolution of reaction norms in natural populations. Arabidopsis thaliana is an ideal organism for the study of Genotype × Environment interactions (i.e., genetic variation for plasticity), because of the ease with which it can be grown in large numbers and due to the amount of information already available on its genetics, physiology and developmental biology. In this paper, we report on the plasticity, genetic variation and G × E interactions of four populations of A. thaliana in response to three environmental gradients (water, light and nutrients), each characterized by four levels of the controlled parameter. We measured nine traits and obtained their reaction norms. Path analysis was used to study the plasticity of character correlations. We found a tendency for A. thaliana reaction norms to be linear (either flat, i.e. no plasticity, or with a significant slope), in accordance with previous studies. We detected substantial amounts of genetic variation for plasticity in the light and nutrient gradients, but not in the water gradient. Dramatic restructuring of character correlations was induced by changes in environmental conditions, although some paths tended to be stable irrespective of the environment, thereby suggesting some degree of canalization.