Early Growth in Rice varieties in relation to their Duration and response to growth-substances
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Author:T. R. NARAYANAN and E. J. VERGHESE
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:35, Issue:jun-jun
DOI: https://doi.org/10.29321/MAJ.10.A04525
Abstract
A good deal of attention has been devoted in recent years to the
inter-relations that exist in a number of crop plants between differences
in the early growth and the subsequent growth behaviour of these plants.
(Thimann and Lone, 1938; Sinnott, 1939; Van Overbeek, 1935; Kaiser and
Albaum 1938). The last two workers were able to find a close relation in
the case of oats, between the early growth and the-subsequent flowering
behaviour. An early-flowering variety (Fulghum) was found to have in the
early stages of growth a slower rate of root growth than a late-flowering
type Black Norway. The two varieties differed also in their response to
different concentrations of the growth-promoting substance B-indole
acetic acid. The late-flowering type Black Norway showed a more rapid
shoot growth when treated with concentrations of 002 mg./litre to 2-0 mg./
litre, while the early-flowering type Fulghum remained unaffected.
A similar relation was observed in two other varieties of oats as well and the
authors.concluded that if such a relation was found to be general, it could
be made to serve as a valuable index of flowering time.
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