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

✍ Scribed by P. N. Seth; Rukmani Venkataraman; S. C. Maheshwari

Publisher
Springer-Verlag
Year
1970
Tongue
English
Weight
611 KB
Volume
90
Category
Article
ISSN
0032-0935

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✦ Synopsis

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 (59)Fe show that, in the medium containing Fe-EDDHA, Fe uptake is stimulated several-fold; this is apparently associated with the flowering condition.

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