HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (18) Citing Articles via Google Scholar Google Scholar Articles by Stenøien, H. K. Articles by Savolainen, O. Search for Related Content PubMed Articles by Stenøien, H. K. Articles by Savolainen, O. Agricola Articles by Stenøien, H. K. Articles by Savolainen, O.

Quantifying latitudinal clines to light responses in natural populations of Arabidopsis thaliana (Brassicaceae)¹

²Department of Botany, Norwegian University of Science and Technology, N-7491 Trondheim, Norway; ³Department of Biology, University of Oulu, PO Box 3000, Fin-90014 Oulu, Finland

Evidence of adaptation in Arabidopsis thaliana (Brassicaceae) phenotypic traits has rarely been shown. We demonstrate latitudinal clines in two A. thaliana traits: hypocotyl responses to red and far-red light. Natural populations of A. thaliana were sampled along a latitudinal gradient from southern to northern Norway. Seeds from maternal families within each population were subjected to 1 wk of constant red, far-red, blue, white, and dark treatments. Hypocotyl lengths were measured for each maternal family within each population. Significant variability within and among populations in hypocotyl responses for the various treatments was found. There was a significant latitudinal cline in hypocotyl responses for red and far-red treatments, with northern populations being more de-etiolated than southern populations. These results suggest that northern populations are more responsive to red and far-red light than southern populations. Thus, differentiation of seedling traits in natural populations of A. thaliana seems in part to be mediated by the phytochrome pathway. There was no correlation between hypocotyl responses and flowering time for any treatment. This suggests that flowering time variability and variability in hypocotyl responses may not be governed by genes shared between the pathways, such as those involved in photoreception or the circadian clock.

Key Words: adaptation • Arabidopsis thaliana • Brassicaceae • circadian clock • flowering time • photoreception • phytocromes

This article has been cited by other articles:

				R. Milla, A. Escudero, and J. M. Iriondo Inherited variability in multiple traits determines fitness in populations of an annual legume from contrasting latitudinal origins Ann. Bot., June 1, 2009; 103(8): 1279 - 1289. [Abstract] [Full Text] [PDF]

				H. Jones, F. J. Leigh, I. Mackay, M. A. Bower, L. M.J. Smith, M. P. Charles, G. Jones, M. K. Jones, T. A. Brown, and W. Powell Population-Based Resequencing Reveals That the Flowering Time Adaptation of Cultivated Barley Originated East of the Fertile Crescent Mol. Biol. Evol., October 1, 2008; 25(10): 2211 - 2219. [Abstract] [Full Text] [PDF]

				M. T. Rutter and C. B. Fenster Testing for Adaptation to Climate in Arabidopsis thaliana: A Calibrated Common Garden Approach Ann. Bot., March 1, 2007; 99(3): 529 - 536. [Abstract] [Full Text] [PDF]

				J. R. Stinchcombe, A. L. Caicedo, R. Hopkins, C. Mays, E. W. Boyd, M. D. Purugganan, and J. Schmitt Vernalization sensitivity in Arabidopsis thaliana (Brassicaceae): the effects of latitude and FLC variation Am. J. Botany, October 1, 2005; 92(10): 1701 - 1707. [Abstract] [Full Text] [PDF]

				H. S. Callahan Using Artificial Selection to Understand Plastic Plant Phenotypes Integr. Comp. Biol., June 1, 2005; 45(3): 475 - 485. [Abstract] [Full Text] [PDF]

				K. K. Shimizu and M. D. Purugganan Evolutionary and Ecological Genomics of Arabidopsis Plant Physiology, June 1, 2005; 138(2): 578 - 584. [Full Text] [PDF]

				A. L. Caicedo, J. R. Stinchcombe, K. M. Olsen, J. Schmitt, and M. D. Purugganan Epistatic interaction between Arabidopsis FRI and FLC flowering time genes generates a latitudinal cline in a life history trait PNAS, November 2, 2004; 101(44): 15670 - 15675. [Abstract] [Full Text] [PDF]

				M. Riihimaki and O. Savolainen Environmental and genetic effects on flowering differences between northern and southern populations of Arabidopsis lyrata (Brassicaceae) Am. J. Botany, July 1, 2004; 91(7): 1036 - 1045. [Abstract] [Full Text] [PDF]

				J. R. Stinchcombe, C. Weinig, M. Ungerer, K. M. Olsen, C. Mays, S. S. Halldorsdottir, M. D. Purugganan, and J. Schmitt A latitudinal cline in flowering time in Arabidopsis thaliana modulated by the flowering time gene FRIGIDA PNAS, March 30, 2004; 101(13): 4712 - 4717. [Abstract] [Full Text] [PDF]