Volume 64, Issue 2
August 1966, pages 75-126
pp 75-82 August 1966
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.
pp 83-90 August 1966
The floral anatomy ofKaempferia rosea is studied in detail. Anatomical observations demonstrate fusion of vascular strands of different floral whorls. The inferior ovary is considered to be a result of extreme degrees of adnation.
The developmental aspects of the glands and their vascular supply in the present plant are discussed in comparison with those of other zingiberaceous species. It is regarded that in this family the septal nectaries are replaced by vascularized emergences of carpellary tissue which exhibit a progressive series in their elevation from a position within the septa to one truly epigynous. The Costeae are thought to be the simplest in this respect.
pp 91-95 August 1966
The existence of a relation between potential nitrate N (pN) values and yield capacity in cane varieties has been established. The relation is suggested to be of use in having a rapid assessment of the relative superiority of cane varieties in respect of their yield capacity under different soil and climatic conditions without extensive field trials. The possible utility ofpN values in grading cane varieties in relation to their response for high N-fertilization has been indicated.
pp 96-109 August 1966
The changes in volume in isosmotic medium show that the gut while taking in and giving out water through the mouth and anus is capable of altering the volume of the whole body. Such changes in volume, and therefore of pressure relations within, become significant when as the result of transfer to anisosmotic media, there is osmotic entry or escape of water, into and out of the haemolymph. In dilute medium the entry of water into the haemolymph increases its volume; and its pressure on the gut may not only check further entry of water but may facilitate filtration of hypotonic water from the haemolymph into the gut. In hyperosmotic medium, the loss of water and reduction of haemolymph volume are accompanied by increase of pressure from the more distended gut causing ultra filtration of dilute sea-water from the gut into the haemolymph. The decrease of the body volume in prawns acclimatised to dilute medium and the increase of body volume in concentrated medium, as well as the fluctuations in volume of prawns acclimatised to anisosmotic media, are features associated with the part played by fluid pressure in active regulation of water across the gut wall.
pp 110-113 August 1966
1. Microbiological plate assays of tissues of four species of bivalves,Arca granosa, Catelysia opima, Meretrix casta andSanguinolaria diphos show inhibitory action againstS. lutea, B. subtilis andE. coli.
2. The tissues ofArca granosa show the maximum inhibitory activity against all the bacteria tested. The inhibitory action of the tissues ofMeretrix casta andCatelysia opima was similar.
pp 114-120 August 1966
An azoic intermediate, 3:2′-dimethoxy-4-aminoazobenzene, has been found to exhibit high incidence of squamous-cell carcinomas in the ear duct of male rats.
pp 121-126 August 1966
Mineralogy of the gneisses, granulites and green schists from Guntavada of Visakhapatnam District is described. Leptynites, calc-silicate rocks and hypersthene granulites are formed by high grade regional metamorphism. The green schists are formed due to retrograde metamorphism of the gneisses and granulites.
The formation of hypersthene granulites from garnetiferous gneisses and garnet-diopside gneisses from these areas (Visakhapatnam District and Eastern Ghats) is recorded for the first time.