Articles written in Proceedings – Section B
Volume 25 Issue 1 January 1947 pp 28-34
Volume 25 Issue 6 June 1947 pp 178-187
Volume 26 Issue 1 July 1947 pp 7-12
Volume 26 Issue 2 August 1947 pp 60-63
Volume 26 Issue 2 August 1947 pp 64-68
Volume 27 Issue 2 February 1948 pp 33-46
Volume 28 Issue 2 August 1948 pp 33-33 Erratum
Volume 28 Issue 2 August 1948 pp 56-70
Volume 29 Issue 1 January 1949 pp 5-12
Volume 29 Issue 2 February 1949 pp 48-58
Volume 32 Issue 2 August 1950 pp 67-79
Volume 32 Issue 3 September 1950 pp 97-111
Volume 32 Issue 5 November 1950 pp 205-214
Volume 37 Issue 3 March 1953 pp 110-113
Volume 37 Issue 6 June 1953 pp 228-231
Volume 38 Issue 3 September 1953 pp 118-124
Volume 41 Issue 3 March 1955 pp 110-116
Volume 42 Issue 6 December 1955 pp 249-257
Volume 43 Issue 3 March 1956 pp 172-174
Volume 43 Issue 3 March 1956 pp 175-177
Volume 45 Issue 3 March 1957 pp 149-150
Volume 62 Issue 2 August 1965 pp 73-86
The pigeon pea sterility mosaic was not transmitted by sap, insects or dodder. There were indications to show that probably the disease was soil borne. A consistent reduction in the disease incidence with reduction in nematode population by the application of nematocides D.D. and nemagon was observed. The reduction in disease incidence was greater in D.D. treated plots than in nemagon treated plots. A statistically significant positive correlation was established between the number of
A negative correlation was obtained between the population of plants and percentages of infection by this disease.
Volume 62 Issue 3 September 1965 pp 130-139
The reduction in the contents of chlorophyll in virus diseased pigeon pea leaves was observed to be as high as 60·9 per cent. Carotene and xanthophyll contents of diseased leaves also showed a decrease. The activity of chlorophyllase was increased due to virus infection. The total carbohydrate contents of diseased leaves were reduced. The synthesis of sucrose in diseased leaves was at a lower rate than in the healthy. This reduction in the ability to synthesize sucrose indicated a derangement of photosynthetic activity in diseased plants. Evidences were obtained to show that the translocation of sugars was reduced and that the nature of sugars translocated was altered in the diseased plants.
Volume 63 Issue 6 June 1966 pp 288-296
A decrease in the chloroplastic protein and a slight increase in the cytoplasmic protein were seen in the diseased leaves. There was no appreciable quantitative difference in the amino-acid contents of proteins of healthy and diseased plants. The total nitrogen content of diseased leaves showed a progressive increase over healthy during the day starting from the morning till evening. The free amino-acids of diseased leaves showed variations both in quality and quantity. Alanine, asparagine, arginine and aspartic acid were found to be in higher concentrations in diseased leaves, the increase being proportional to the severity of disease symptoms. The presence of two unidentified amino-acids was detected only in diseased leaves.
The amino-acids, alanine, asparagine, aspartic acid and arginine which were in very high concentrations in diseased leaves at 6 a.m. were observed to be either completely absent or present only in very small amounts at 6 p.m. A decrease in the C/N ratio resulted due to virus infection. This reduction could be attributed to the reduction in the carbohydrate content and increase in nitrogen content of diseased leaves.
Volume 64 Issue 2 August 1966 pp 75-82
The diastatic activity in pigeon pea leaves infected by PSMV was more than in the healthy leaves. Very low peroxidase activity was noticed in diseased leaves. The catalase activity in infected leaves was observed to be slightly increased. The activities of nitrate reductase and proteolytic enzymes in the diseased leaves showed an increase over the healthy leaves. The significance of these changes is discussed.
Volume 64 Issue 3 September 1966 pp 135-142
A general reduction in the organic acid contents of leaf, petiole, stem and buds of diseased plants was observed. Ascorbic acid contents of different tissues exhibited a reduction. The absence of malic acid and citric acid in diseased leaves and petioles respectively was observed. Accumulation of citric acid and succinic acids respectively in stem and root of the diseased plants was noticed. The rate of respiration was increased in diseased plants. The increase in the rate of respiration was noticed throughout the day.
Volume 68 Issue 6 December 1968 pp 295-300
Total carbohydrates were significantly less in virus diseased pigeon pea leaves at all ages below the second leaf than in comparable healthy leaves. While the total carbohydrate content increased with age in healthy plants, no such regular pattern was discernible in diseased leaves. Starch and resin were significantly lower in diseased leaves than in healthy leaves and sucrose levels were not significantly different. Increased levels of reducing sugars and non-fermentable reducing substances were observed in diseased leaves over healthy leaves.
Volume 69 Issue 3 March 1969 pp 104-114
Little information is available on the sequence of physiological changes from virus inoculation to full development of disease symptoms. In this paper, we discuss (1) activity of chlorophyllase, (2) ferrous and ferric iron changes, (3) inorganic and organic phosphorus, and (4) respiration in pigeon pea sterility mosaic infected pigeon pea plants and cassava mosaic infected cassava plants.
In both healthy and diseased plants, chlorophyll
Volume 70 Issue 1 July 1969 pp 37-41
PSMV-affected pigeon pea generally had a lower level of calcium, the decrease being conspicuous in older leaves than healthy counterparts. Potassium level decreased in diseased leaves at all ages, petiole, stem and root than comparable healthy tissues. Sodium level was significantly lower in fourth and fifth leaves in diseased plant. Diseased leaves had a lower level of manganese at all ages than healthy counterparts.
Volume 70 Issue 5 November 1969 pp 200-207
Diseased pigeon pea leaves at all ages had a higher level of total nitrogen than comparable healthy leaves. While increased levels of nitrate nitrogen, nitrite nitrogen, amide nitrogen and protein nitrogen were observed in diseased leaves, ammoniacal nitrogen and non-protein nitrogen recorded a fall in diseased leaves. The levels of both free and bound amino-acids increased in diseased leaves at all ages. A high concentration of free amino-acids like valine, leucine and arginine was observed in young diseased leaves. These were in lower concentration in older diseased leaves. Their probable incorporation into the virus protein is suggested by the finding of a high level of these amino-acids in the bound form in diseased leaves.
Volume 73 Issue 1 January 1971 pp 30-35
A virus disease of bittergourd (
Volume 73 Issue 2 February 1971 pp 84-95
Investigations carried out on the relationship of Bittergourd Mosaic virus and its vectors indicated that the pre-acquisition fasting threshold, acquisition threshold and inoculation feeding threshold were 15 minutes, 5 seconds and 60 seconds respectively for
Volume 74 Issue 4 October 1971 pp 194-207
Melon Mosaic Virus (MMV) was non-persistent in its three aphid vectors. The pre-acquisition fasting threshold, acquisition threshold and the inoculation feeding threshold were 5 minutes, 10 seconds and 60 seconds respectively for
It was concluded that all aphids have a salivary inactivator, the quantity secreted varied from species to species, the efficiency of transmission being inversely correlated with the quantity of inhibitor secreted.
Volume 80 Issue 5 November 1974 pp 222-225
A toxin produced by
Volume 81 Issue 4 April 1975 pp 170-173
Turmeric leaves infected by