Plant Phototropic Growth.

Détails

Ressource 1Télécharger: BIB_251186D6D8D2.P001.pdf (902.44 [Ko])
Etat: Public
Version: Author's accepted manuscript
ID Serval
serval:BIB_251186D6D8D2
Type
Article: article d'un périodique ou d'un magazine.
Sous-type
Synthèse (review): revue aussi complète que possible des connaissances sur un sujet, rédigée à partir de l'analyse exhaustive des travaux publiés.
Collection
Publications
Titre
Plant Phototropic Growth.
Périodique
Current Biology
Auteur(s)
Fankhauser C., Christie J.M.
ISSN
1879-0445 (Electronic)
ISSN-L
0960-9822
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
25
Numéro
9
Pages
R384-R389
Langue
anglais
Résumé
Plants are photoautotrophic sessile organisms that use environmental cues to optimize multiple facets of growth and development. A classic example is phototropism - in shoots this is typically positive, leading to growth towards the light, while roots frequently show negative phototropism triggering growth away from the light. Shoot phototropism optimizes light capture of leaves in low light environments and hence increases photosynthetic productivity. Phototropins are plasma-membrane-associated UV-A/blue-light activated kinases that trigger phototropic growth. Light perception liberates their protein kinase domain from the inhibitory action of the amino-terminal photosensory portion of the photoreceptor. Following a series of still poorly understood events, phototropin activation leads to the formation of a gradient of the growth hormone auxin across the photo-stimulated stem. The greater auxin concentration on the shaded compared with the lit side of the stem enables growth reorientation towards the light. In this Minireview, we briefly summarize the signaling steps starting from photoreceptor activation until the establishment of a lateral auxin gradient, ultimately leading to phototropic growth in shoots.
Pubmed
Web of science
Open Access
Oui
Création de la notice
28/05/2015 12:56
Dernière modification de la notice
20/08/2019 13:03
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