Plant Physiol. Drug Metab Dispos
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on May 20, 2005; 10.1104/pp.104.059071

This Article
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow All Versions of this Article:
138/2/1126    most recent
pp.104.059071v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Web of Science (5)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Alconada Magliano, T. M.
Right arrow Articles by Casal, J. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Alconada Magliano, T. M.
Right arrow Articles by Casal, J. J.
Agricola
Right arrow Articles by Alconada Magliano, T. M.
Right arrow Articles by Casal, J. J.

Received December 28, 2004
Returned for revision February 1, 2005
Accepted February 2, 2005

New Arabidopsis Recombinant Inbred Lines (Landsberg erecta x Nossen) Reveal Natural Variation in Phytochrome-Mediated Responses

Teresa M. Alconada Magliano , Javier F. Botto , A. Veronica Godoy , V. Vaughan Symonds , Alan M. Lloyd , and Jorge J. Casal *

IFEVA, Facultad de Agronomía, Universidad de Buenos Aires y Consejo Nacional de Investigaciones Científicas y Técnicas, 1417 Buenos Aires, Argentina
University of Texas, Department of Molecular, Cell, and Developmental Biology, Austin, Texas 78712

* Corresponding author; email: casal{at}ifeva.edu.ar.

We used 52 Arabidopsis (Arabidopsis thaliana) accessions and developed a new set of 137 recombinant inbred lines between Landsberg erecta (Ler) and Nossen (No-0) to explore the genetic basis of phytochrome-mediated responses during deetiolation. Unexpectedly, most accessions showed weak or moderate hypocotyl growth and cotyledon unfolding responses to pulses of far-red light (FR). Crosses between Columbia and No-0, two accessions with poor response, segregated seedlings with unfolded cotyledons under pulsed FR, suggesting the occurrence of accession-specific loci in the repression of morphological responses to weak light signals. Confirming the latter expectation, mapping of responses to pulsed FR in the Ler x No-0 lines identified novel loci. Despite its weak response to pulsed FR, No-0 showed a response to continuous FR stronger than that observed in Ler. By mapping the differential effect of pulsed versus continuous FR, we identified two high-irradiance response loci that account for the steeper response to continuous FR in No-0. This underscores the potential of the methodology to identify loci involved in the regulation of the shape of signal input-output relationships. Loci specific for a given phytochrome-mediated response were more frequent than pleiotropic loci. Segregation of these specific loci is predicted to yield different combinations of seedling responsivity to light. Such flexibility in combination of responses is observed among accessions and could aid in the adjustment to different microenvironments.




This article has been cited by other articles:


Home page
 ANN BOT (LOND)Home page
M. P. Laserna, R. A. Sanchez, and J. F. Botto
Light-related Loci Controlling Seed Germination in Ler x Cvi and Bay-0 x Sha Recombinant Inbred-line Populations of Arabidopsis thaliana
Ann. Bot., October 1, 2008; 102(4): 631 - 642.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
K. A. Oliverio, M. Crepy, E. L. Martin-Tryon, R. Milich, S. L. Harmer, J. Putterill, M. J. Yanovsky, and J. J. Casal
GIGANTEA Regulates Phytochrome A-Mediated Photomorphogenesis Independently of Its Role in the Circadian Clock
Plant Physiology, May 1, 2007; 144(1): 495 - 502.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 2005 by the American Society of Plant Biologists