Shoot/root assimilate allocation and nodulation of Vigna unguiculata seedlings as influenced by shoot light environment
Cite this article as: Kasperbauer, M.J. & Hunt, P.G. Plant Soil (1994) 161: 97. doi:10.1007/BF02183089 Abstract
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 nodulation photomorphogenesis photosynthate partitioning reflected light References
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