Volume 29, Issue 2
February 1949, pages 23-82
pp 23-34 February 1949
pp 35-47 February 1949
pp 48-58 February 1949
pp 59-64 February 1949
Thirty-eight varieties of groundnut (Arachis hypogea) grown under identical conditions at Mysore Government Agricultural Farm, Hebbal, were analysed for their vitamin B1 content.
Wide differences were observed in vitamin B1 content of various varieties, the value ranging from 5·4 to 17·2 micrograms per gram of defatted flour.
No correlation between the average yields of various varieties and their vitamin B1 content was observed.
The differences in vitamin B1 content are attributable mainly to variations in variety, as all the other conditions under which they were grown are identical.
Other factors which influence the vitamin B1 content and the possible significance of the results obtained in the present investigation in breeding programmes are discussed briefly.
pp 65-69 February 1949
Ten varieties of groundnut were analysed for free and bound forms of vitamin B1 About 50 per cent, of total vitamin exists in the bound form.
Digestion with papain or a mixture of papain and takadiastase have the same effect in transforming the bound vitamin into free form. The bound vitamin B1 is not a cocarboxylase.
The bound form of the vitamin can be extracted completely, with 10 per cent. NaCl and can also be precipitated with 4 per cent, trichloroacetic acid. It, therefore, exists bound to protein.
pp 70-74 February 1949
The physiological availability of Vitamin B1 in groundnut was studied by rat growth technique. The results indicate that Vitamin B1 in groundnut is completely available for growth.
pp 75-78 February 1949
The changes in vitamin B1 content of groundnut during germination were studied.
There is decrease in total vitamin B1 content as the germination advances.
The “bound form” of vitamin B1 is rendered free during germination.
The probable causes for the decrease in vitamin B1 and the mechanism of transformation of “bound vitamin B1” into free form during germination are discussed.
pp 79-82 February 1949
The groundnut (HG1) grown in plots with various manurial treatments was analysed for vitamin B1 content by thiochrome method. No differences in vitamin B1 content were noticed, the relative values being as follows: (A) Cattle manure 14.9 micrograms/gm. of defatted flour (B)Cattle manure 14.6 micrograms/gm. of defatted flour (C) Artificial manure 14.8 micrograms/gm. of defatted flour (D) Artificial manure 14.9 micrograms/gm. of defatted flour (E) Artificial manure 14.6 micrograms/gm. of defatted flour