Volume 27, Issue 1
January 1948, pages 1-32
pp 1-3 January 1948
The stage of growth at which the tissues were attacked determined the affected area and the changes in the size and shape of cells forming them.
Lignification of cell walls was greater and less respectively in affected parenchyma and sclerenchyma than in the healthy ones.
No marked varietal differences in the behaviour of tissues were discernible.
pp 4-17 January 1948
pp 18-25 January 1948
pp 26-32 January 1948
It has been demonstrated that the formation of urea is one of the important biochemical changes taking place in the course of protein regeneration in seedlings. The quantities of urea formed inDolichos biflorus andPhaseolus mungo represent a considerable proportion of the amides formed in these seedlings and explain the observation previously reported that amides are in excess of the dicarboxylic acids.
From the quantitative relations between the changes in urea, urease, arginine and arginase it is inferred that at least inDolichos biflorus a part but not the whole of the urea arises from the hydrolysis of arginine. It is, however, necessary to assume the existence both inDolichos biflorus andPhaseolus mungo of an additional mechanism responsible for urea formation.