Modelling leaf phototropism in a cucumber canopy

Functional Plant Biology : FPB
Katrin KahlenHartmut Stützel

Abstract

Leaf phototropism might have significant effects on the light interception, dry matter production and yield of cucumber (Cucumis sativus L.). The objective of the present study was to model the phototropism of leaves in a greenhouse cucumber canopy. The dynamic structural model of cucumber using a parametric L-system was extended to mimic the leaf movement induced by gradients in the local light environment of each leaf. The red to far-red (R : FR) ratio is known to be a driving force in shade avoidance reactions of plants. In the model, R : FR ratios on the left and right leaf half of each individual leaf lamina were calculated and the change in tropism angle per phyllochron was based on the R : FR gradient across the leaf halves. The tropism angle of a leaf describes the deviation of the present leaf azimuth from the initial leaf orientation, which is predefined by the phyllotaxis of the plant. Even in its simple form, the model simulated photo-morphogenic canopy responses.

References

Nov 13, 2002·Plant Physiology·Gustavo Angel MaddonniJorge J Casal
Apr 20, 2004·Journal of Theoretical Biology·Pekka Kaitaniemi
May 17, 2005·Annals of Botany·Keara A Franklin, Garry C Whitelam
Oct 12, 2007·Plant, Cell & Environment·Stanislaus J SchymanskiJason Beringer
Jun 1, 2008·Functional Plant Biology : FPB·Prem KumarJohn Z Kiss

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Citations

Dec 10, 2009·Journal of Experimental Botany·J VosP H B de Visser
Jul 6, 2014·Frontiers in Plant Science·E David Ford
Jan 22, 2011·The New Phytologist·Katrin Kahlen, Hartmut Stützel
Oct 30, 2016·Frontiers in Plant Science·Alex WuGraeme L Hammer

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