, Volume 90, Issue 4, pp 349–359 | Cite as

Studies on the growth and flowering of a short-day plant, Wolffia microscopica

II. Role of metal ions and chelates
  • P. N. Seth
  • Rukmani Venkataraman
  • S. C. Maheshwari


As found earlier, supply of EDTA was obligatory for both flowering and satisfactory vegetative growth in Wolffia microscopica. It is now shown that the metal affecting growth and flowering is most probably iron. Omission of Fe but not of Cu, Zn, Mn and B from the medium markedly affects vegetative growth. There exists also a strong interaction between EDTA and Fe, one being largely inactive in the absence of the other. When Fe-EDDHA is substituted for Fe-citrate and EDTA in the medium, no great effect is seen in vegetative growth, but flowering takes place even under continuous light. Studies with 59Fe show that, in the medium containing Fe-EDDHA, Fe uptake is stimulated several-fold; this is apparently associated with the flowering condition.


Iron EDTA Flowering Condition Strong Interaction Vegetative Growth 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



ethylenediaminetetraacetic acid


ethylenediamine-di-o-hydroxyphenylacetic acid


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Copyright information

© Springer-Verlag 1970

Authors and Affiliations

  • P. N. Seth
    • 1
  • Rukmani Venkataraman
    • 1
  • S. C. Maheshwari
    • 1
  1. 1.Department of BotanyUniversity of DelhiIndia

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