Volume 8, Issue 3
September 1938, pages 109-248
pp 109-150 September 1938
pp 151-156 September 1938
The seeds of sorghum vary very much in their size. Seed size (length × breadth × thickness) is highly correlated to seed weight. The larger the seed the bigger is its embryo, and the bigger the seedling that grows from it. In six varieties typical of different seed sizes the relationship between seed and seedling leaf measurements have been pursued. The first two seedling leaves are abnormal, in shape, being much wider than long. In these two seedling leaves the width of the seedling is highly correlated with seed size. In the third seedling leaf the length of the leaf is beginning to be influenced by seed size. In this third leaf the midrib and ligular and auricular structures attain their full development.
pp 157-170 September 1938
pp 171-181 September 1938
pp 182-187 September 1938
pp 188-191 September 1938
The occurrence ofCytospora sacchari Butl. is recorded in the Punjab.
Symptoms of the disease and nature of damage caused byCytospora sacchari Butl. have been described.
The parasitism of the fungus has been proved on sugarcane by inoculation experiments.
The investigation reported was carried out as a part of the scheme of Sugarcane Research financed by the Imperial Council of Agricultural Research.
pp 192-201 September 1938
pp 202-210 September 1938
The development of the gametophyte inPteris biaurita is of thePteris longifolia type.
There is no typical cushion which is met with commonly in ferns behind the notch in well-developed prothalli.
Antheridia with motile sperms apparently capable of fertilization are formed but archegonia are eliminated out of the life-cycle of the gametophyte.
The dehiscence of the antheridia occurs by the bodily lifting of the opercular cell which is thrown off with some force.
The embryo formation is by apogamous bud.
pp 211-217 September 1938
Some abnormalities in the female strobilus ofGinkgo biloba are recorded from the only tree growing in the Punjab plain.
2-Ovulate normal strobili are rather rare while 3-ovulate strobili with only the terminal ovule fertile are very common on the tree. Occasionally 4-ovulate and 5-ovulate strobili are met with.
‘Double ovules’ formed by the fusion of the primordia of two ovules during development are met with to the extent of 20 per cent. These are flat, with a median groove. In vertical section they possess two loculi both of which may have fully developed gametophyte or only one of them. In the former case the ovules are symmetrical, in the latter asymmetrical.
Abnormal ovules having the female gametophyte exposed at the apex are frequently met with.
Anatomy of the axis of abnormal strobili has been worked out and differences from that described by previous authors pointed.
pp 218-230 September 1938
pp 231-242 September 1938
pp 243-248 September 1938
A procedure for determining the nature of the products of proteolysis making use of the factor, total N/amino N, at various stages of the enzyme action, is described.
The procedure has been applied to the results of casein hydrolysis. It has been shown that under the action of crystalline trypsin, peptides with a complexity factor of 8, are chipped off from the casein. With crude trypsin, on the other hand, no such regularity is observed.