Plant and Soil

, Volume 161, Issue 1, pp 97–101

Shoot/root assimilate allocation and nodulation ofVigna unguiculata seedlings as influenced by shoot light environment

  • M. J. Kasperbauer
  • P. G. Hunt

DOI: 10.1007/BF02183089

Cite this article as:
Kasperbauer, M.J. & Hunt, P.G. Plant Soil (1994) 161: 97. doi:10.1007/BF02183089


Spectral balance of light received by southern pea [Vigna unguiculata (L.) Walp.] seedling shoots affected photoassimilate allocation among leaves, stems and roots. A higher ratio of far-red (FR) relative to red (R) light resulted in longer stems, higher shoot/root biomass ratio, less massive roots and fewer nodules. The same response pattern to FR/R ratio was obtained in a controlled environment with artificial light sources, or in sunlight where the FR/R ratio was modified by reflection from different colored soil surfaces or by FR reflected from competing plants. The importance of early shoot/root photoassimilate allocation and nodulation may differ according to soil nitrogen availability and moisture content.

Key words

nodulationphotomorphogenesisphotosynthate partitioningreflected light

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • M. J. Kasperbauer
    • 1
  • P. G. Hunt
    • 1
  1. 1.Coastal Plains Soil and Water Conservation Research CenterFlorenceUSA