Plant and Soil

, Volume 155, Issue 1, pp 191–194

The role of free sugars and amino acids in the regulation of biomass partitioning and plant growth

Authors

  • Jan Buysse
    • Laboratory for Soil Fertility and Soil Biology, Faculty of Agricultural SciencesK.U. Leuven
  • Erik Smolders
    • Laboratory for Soil Fertility and Soil Biology, Faculty of Agricultural SciencesK.U. Leuven
  • Roel Merckx
    • Laboratory for Soil Fertility and Soil Biology, Faculty of Agricultural SciencesK.U. Leuven
Article

DOI: 10.1007/BF00025016

Cite this article as:
Buysse, J., Smolders, E. & Merckx, R. Plant Soil (1993) 155: 191. doi:10.1007/BF00025016

Abstract

Theoretical plant growth models postulate an important role for growth substrates such as sugars and amino acids. To test this experimentally, spinach plants were grown under controlled conditions and with nitrogen added daily, following different exponential addition schemes. Plants were harvested during exponential growth. Free amino acid levels or free sugar levels were only weakly correlated with growth and biomass partitioning. Factor analysis showed however that the product of free sugar concentration and amino acid concentration yielded a parameter adequately reflecting the plant's nutritional state.

It is concluded that growth and biomass partitioning under limiting N conditions cannot be modelled solely based on N substrate levels.

Key words

amino acidsbiomass partitioninggrowthSpinacia oleraceasugarsstarch

Copyright information

© Kluwer Academic Publishers 1993