Simulation of the three dimensional distribution of the red:far-red ratio within crop canopies - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue New Phytologist Année : 2007

Simulation of the three dimensional distribution of the red:far-red ratio within crop canopies

Résumé

It is widely recognized that the red:far-red ratio (ζ) acts as a signal that triggers plant morphogenesis. New insights into photomorphogenesis have been gained through experiments in controlled environments. Extrapolation of such results to field conditions requires characterization of the ζ signal perceived by plant organs within canopies. This paper presents a modeling approach to characterize this signal. A wheat (Triticum aestivum) architectural model was coupled with a three-dimensional light model estimating the irradiances of virtual sensors. Architectural parameters and ζ values were measured on two contrasting spring wheat canopies under outdoor conditions. Light simulations were compared with measurements, and an analysis of sensitivity to measurement conditions was carried out. The model results agreed well with measurements and previously published data. The sensitivity analysis showed that ζ strongly depends on canopy development as well as on sky conditions, sensor orientation, and sensor field of view. This paper shows that modeling enables investigation of ζ distribution in a canopy over space and time. It also shows that the characterization of light quality strongly depends on measurement conditions, and that any discrepancies in results are likely attributable to different experimental set-ups. The usefulness of this modeling approach for crop photomorphogenesis studies is discussed.

Dates et versions

hal-01191921 , version 1 (02-09-2015)

Identifiants

Citer

Michaël Chelle, J.B. Evers, Didier Combes, Claude Varlet-Grancher, J. Vos, et al.. Simulation of the three dimensional distribution of the red:far-red ratio within crop canopies. New Phytologist, 2007, 176 (1), pp.223-234. ⟨10.1111/j.1469-8137.2007.02161.x⟩. ⟨hal-01191921⟩
208 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More