• Volume 90, Issue 4

      August 1981,   pages  275-387

    • Supplementary value of single cell protein fromMyrothecium verrucaria to wheat protein

      Ajit Singh G S Dhillon M S Kalra

      More Details Abstract Fulltext PDF

      Corn cobs, an agricultural waste material, were used as carbon source for single cell protein (SCP) by collulolytic fungusMyrothecium verrucaria. The biomass comprised of protein 28·1%; moisture 5·75%; fat 2·3%; phosphorus 0·88% and ash 7·42%. The amino acid provisional scoring pattern of biomass showed deficiency in sulphur containing amino acid methionine. Feeding trials on rats with biomass revealed that its supplementation to wheat flour at 30% level improved the growth rate and protein efficiency ratio (PER) as compared to wheat flour alone. Incorporation of DL-methionine to 30% SCP diet further improved the growth rate and PER values in rats.

    • Effect of irradiation and chemical treatment on yield and quality ofBrassica juncea (L.) seed and oil

      B Nagamani T Kamala T Chandrasekhara Rao G Lakshminarayana

      More Details Abstract Fulltext PDF

      Six mutants obtained by gamma-ray irradiation and post-irradiation chemical treatment were selected on the basis of seed size, branching pattern and period of maturity and analysed for sced yield, oil content, protein content and fatty acid composition. Increase in the seed size was associated with an increase in protein content as well as erucic acid content in oil but not with oil content. As compared to controls, the increase in erucic acid content was found in all the mutants.

    • Cytomixis in pollen mother cells of an exotic variety ofTrigonella foenum-graecum L.

      N Lakshmi P Veera Raghavaiah

      More Details Abstract Fulltext PDF

      The phenomenon of cytomixis as well as loss of chromosomes in the meiotic cells ofTrigonella foenum-graecum L. have been described. Because of cytomixis, at diakinesis and metaphase I, 18% of pollen mother cells (PMCs) showed chromosome numbers ranging from 3–28. Chromatin migration occurred after pairing through cytoplasmic bands connecting adjacent PMCs. In some PMCs the chromatin is transformed into thin whip-like structures and then migrated, while in others it breaks up into variously-sized bits before migration. It is suggested that this is a natural phenomenon and is under genetic control. The plant is partially fertile, hence the phenomenon may be of considerable evolutionary significance.

    • Role of phenylalanine and tyrosine ammonia lyase enzymes in the pigmentation during development of brinjal fruit

      P M Mehta K Bhavnarayana

      More Details Abstract Fulltext PDF

      Changes in the development of L-phenylalanine ammonia lyase, L-tyrosine ammonia lyase and their relation with the pigment development in the fruit skin (Solanum melongena) are studied. The activity of TAL enzyme was higher than PAL enzyme. Their activities are correlated with the development of anthocyanins and flavonols. The pigment is analysed and confirmed as delphinidin 3-monoglucoside.

    • Studies on the algae of Ambazari water treatment plant

      J L Tarar Gouri Mazumdar

      More Details Abstract Fulltext PDF

      Preliminary observations on the algae present in Ambazari water treatment plant, of Nagpur (Maharashtra) have been made. Thirty six algal taxa have been reported. The effect of various concentrations of bleaching powder,curcuma powder, and different temperature treatments was studied.Curcuma was more effective in controlling the algae than the bleaching powder.Curcuma is a natural potential algicide and is useful in purifying drinking water. The maximum temperature tolerated by the algal form is 70°C with the sole exception ofChlorococcum humicolo which withstands temperature up to 80°C. Thus these treatments have been found useful in eliminating the algal forms present in the water resource.

    • Morpho-histologic studies on three herbaceous species of railway track

      T Chakrabarty Dilip Gupta

      More Details Abstract Fulltext PDF

      Changes in the morpholohy and leaf histology ofEuphorbia hirta L. (Euphorbiaceae),Boerhavia diffusa L. (Nyctaginaceae), andCleome viscosa L. (Cleomaceae) growing along a particular railway track have been studied in comparison with those individuals of these species growing well away from railway track to evaluate the effects of pollution and physical disturbances created by running of trains. In general, plants growing along the railway track showed a decrease in the size of whole plant, flowers and fruits, root-shoot ratio, length of root-system, stem diameter, fruit setting, and seed output. Also, leaf stomatal frequency, veinislet number and veinlet termination number increased while the palisade ratio decreased.

    • Cytomorphological studies in x-ray induced glandless haploids inGossypium hirsutum L. (cotton)

      S S Mehetre M V Thombre

      More Details Abstract Fulltext PDF

      Six haploid plants were obtained in M2 generation of the 25 kr. x-ray irradiatedGossypium hirsutum L. cotton variety H.G. 108. The cytomorphological studies on these plants indicated highly irregular meiosis, giving on an average six bivalents, the range being 0–9. Unequal separation of chromosomes and chromatids at anaphase-I and II respectively led to formation of abnormal tetrads and pollens with high size variations leading to high pollen sterility. These plants were characterized by miniature stature, shorter stem and internodes, smaller leaves, flowers and stomata with fewer chloroplasts, male and female sterility and halving of chromosomes. The reduction in morphological characters was nearly in the proportion of 1∶2 as compared to their diploid counterparts.

    • Pharmacognostical studies onNymphoides macrospermum Vasudevan (Menyanthaceae) and comparison withValeriana jatamansi Jones (Valerianaceae)

      Z Mary J K Pattan Shetty S N Yoganarasimhan

      More Details Abstract Fulltext PDF

      The roots and rhizomes ofNymphoides macrospermum Vasudevan replace the well-known ayurvedic drugTagara obtained fromValeriana jatamansi Jones in many South Indian pharmacies. The pharmacognostical and preliminary phytochemical analysis ofN. macrospermum and a comparison withV. jatamansi are presented.

    • Pharmacognostic studies on the flower ofWoodfordia fruticosa Kurz

      Usha Shome Shanta Mehrotra H P Sharma

      More Details Abstract Fulltext PDF

      Pharmacognosy of the flowers ofWoodfordia fruticosa Kurz has been carried out to lay down standards for the genuine drug “Dhataki”. The paper deals with the detailed anatomy of the pedicel and various floral appendages, pollen ornamentation, seed with unusual mucilage hairs and embryo characters. Histochemical tests and fluorescence characteristics are also described. Thin layer bidirectional chromatography of petroleum ether, benzene, chloroform, alcohol and water extractives was performed. Other parameters studied include physicochemical constants, e.g. ash values, percentages of tannins, sugars and different extractives.

    • Effect of chemical reductant and photosystem II light on the yield of chlorophylla luminescence in isolated chloroplasts

      Prasanna Mohanty

      More Details Abstract Fulltext PDF

      Millisecond delayed luminescence (DL), and chlorophylla (Chla) fluorescence of normal and tris-washed chloroplasts were monitored in the presence of agents that bring about reduction ofQ, the photosystem II (PS II) primary acceptor, and Chla fluorescence quencher. The DL intensity becomes low ifQ is chemically reduced in dark, or by photochemical reduction in the presence of the herbicide diuron. Sillicomolybdate which by-passes the diuron block and accepts electrons directly fromQ enhances the DL. Chla fluorescence is enhanced upon dark chemical reduction ofQ by chemical reductant sodium dithionite. A small fraction ofQ still remains inaccessible to dithionite, and which gets reduced by PS II light. Thus theQ pool in the electron transport chain seems to be heterogenous. However, DL intensity changes are dependent upon the redox state of the large fraction ofQ pool.

    • Optimum cultural requirements forin vitro germination ofAmaryllis vittata Ait (Amaryllidaceae) pollen

      Savita Sharma C P Malik M B Singh

      More Details Abstract Fulltext PDF

      The effect of various factors uponin vitro germination ofAmaryllis vittata pollen was studied to find out optimum cultural requirements for obtaining high percentage of pollen germination and maximum tube growth. Temperature below −10°C was suitable for the storage ofAmaryllis pollen. Maximum germination was observed in sucrose medium. Pollen germination and the tube growth were maximal at the culture density of 5 mg/ml of the culture medium. The optimum temperature was 28±2°C. Studies on respiration suggested that optimum conditions for maximum O2 uptake were the same as for optimum pollen germination and pollen tube growth rate.

    • The family Plagiogyriaceae Bower in India

      R D Dixit Anjali Das

      More Details Abstract Fulltext PDF

      The Plagiogyriaceae is a monotypic family comprising of singular genusPlagiogyria (Kunze) Mett. Sixteen species ofPlagiogyria (including three new species, eight new records and a new name) are described and their distribution indicated.P. glaucescens Ching is considered as an endangered species.

  •  

© 2017-2019 Indian Academy of Sciences, Bengaluru.