Journal Article

Using Virtual Plants to Analyse the Light-foraging Efficiency of a Low-density Cotton Crop

Jean Dauzat, Pascal Clouvel, Delphine Luquet and Pierre Martin

in Annals of Botany

Published on behalf of The Annals of Botany Company

Volume 101, issue 8, pages 1153-1166
Published in print May 2008 | ISSN: 0305-7364
Published online January 2008 | e-ISSN: 1095-8290 | DOI: http://dx.doi.org/10.1093/aob/mcm316
Using Virtual Plants to Analyse the Light-foraging Efficiency of a Low-density Cotton Crop

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  • Ecology and Conservation
  • Evolutionary Biology
  • Plant Sciences and Forestry

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Background and Aims

Cotton shows a marked plasticity vs. density in terms of branch development and geometry, internode elongation and leaf expansion. This paper proposes interpretations for observed plasticity in terms of light quantity and quality.

Methods

3-D virtual plants were reconstructed from field observations and 3-D digitization and were used to simulate the light regime in cotton stands of different densities.

Key Results

All densities showed the same linear relationship between LAI and the sum of light intercepted by the canopy, from seedling emergence up to flowering. Simulated R : FR ratio profiles can very likely explain (1) the longer first internodes on main stem and branches and (2) the azimuthal re-orientation of branches toward the inter-row.

Conclusions

Simulation tools were used to analyse plant plasticity in terms of light quantity and quality. The methodology applied here at the stand scale will now be continued at the plant scale to further strengthen the above hypotheses.

Keywords: Light capture; photomorphogensis; R : FR ratio; cotton; Gossypium hirsutum; plant architecture; virtual plants; phenotypic plasticity; density

Journal Article.  7779 words.  Illustrated.

Subjects: Ecology and Conservation ; Evolutionary Biology ; Plant Sciences and Forestry

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