Volume 44, Issue 3
September 1956, pages 137-185
pp 137-147 September 1956
pp 148-161 September 1956
pp 162-170 September 1956
1. The yellowing of the leaf cultured on sugar solutions was found to be better than that in controls.
2. This was found to be due to the higher carbohydrate content of the sugar-fed leaves, as compared to controls.
3. After briefly reviewing the literature on yellowing, a hypothesis on the role of carbohydrates has been suggested.
4. The water content of the leaves was found to play a part too and this was explained as due to the mobility of carbohydrates.
5. The better grading analysis of sugar-fed leaves as compared to controls in a semi-large scale experiment was in line with the yellowing behaviour of the sugar-fed leaves.
pp 171-176 September 1956
1. Observations under dark ground illumination supplement those made with the phase contrast microscope.
2. When the nucleus is visible in a non-budding cell, the vacuole and the nucleus are delimited from each other by well-formed membranes.
3. Considerable variation in its structure is exhibited by the nucleus in cells of a population.
pp 177-183 September 1956
pp 185-185 September 1956 Erratum