Nom du corpus

Corpus Systématique Végétale

Titre du document

Evidence for two photoreceptors controlling growth in de-etiolated seedlings

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Springer (journals)
Langue(s) du document
Type de document
Mots-clés d'auteur
  • Blue light
  • Cucumis
  • Hypocotyl growth
  • Lactuca
  • Lycopersicon
  • Phytochrome
  • HIR : high irradiance reaction
  • Pfr : far red absorbing form of phytochrome
  • Pr : red absorbing form of phytochrome
Nom du fichier dans la ressource
  • Brian Thomas 1
  • H. G. Dickinson 1
  • 1) Department of Botany, Plant Science Laboratories, University of Reading, Whiteknights, RG6 2AS, Reading, U.K.

The effect of blue light on hypocotyl extension in de-etiolated seedlings of lettuce, cucumber and tomato was investigated under conditions which precluded the involvement of phytochrome. Small but highly inhibitory amounts of blue light were added to a high intensity background illumination from low pressure sodium lamps. A log-linear response for inhibition of hypocotyl extension against the blue light fluence rate was obtained for lettuce and cucumber, and inhibition in tomato was also related to the blue light fluence rate. The added blue light did not alter phytochrome photostationary state and its effect was independent of the total fluence rate. Growth inhibition by Pfr could be demonstrated in tomato and cucumber but not in lettuce. The results indicate that two photoreceptors may normally be involved in the control of seedling growth but their relative importance varies greatly between species.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - plant biology & botany
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - physiologie vegetale et developpement
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Plant Science
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Genetics
Catégories WoS
  • 1 - science ; 2 - plant sciences
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