REPRODUCTION INDUCED BY HIGH HYDROSTATIC PRESSURE IN CLADOPHORA GLOMERATA (L.) KUETZ FROM BALTIC SEA.
ABSTRACT:
The after effects of hydrostatic pressure on the cellular morphology of Cladophora glomerata were studied. Two experimental series, one of 5 hours’ and the other of 20 hours’ pressure duration were conducted at 15°C; the pressure levels being: 400, 500, 800 & 1000 atm. Abnormalities in the morphology of algal cells increased with the rise of pressure. The pressure treated algae exhibited a vigorous reproduction, producing abnormally the bi-and quadriflagellated zoospores with limited power of escaping through subterminal pores. The retained zoospores metamorphosed themselves to spherical cysts. Tnere was an initial increase in the intensity of rep -oduction with the increase of hydrostatic pressure as well as the time of pressure action. When both these factors reached the upper physiological limit of tolerance for the alga, the reproduction intensity decreased sharply.

SEASONAL SUCCESSION OF CERTAIN SPECIES OF PHYTOPLANKTON FROM ST. MARGARET’S BAY, N.S.
ABSTRACT:
Seasonal succession of 18 species of phytoplankton from St. Margaret’s Bay is described. Species of Chactoceros and Thalassiosira occurre d abundantly at times when nutrient values were high and temperatures were low, whereas Ceratium spp. preferred nutrient poor warm waters. Seasonal associations of species of phytoplankton which characterized one or more than one seasons were noted.

STUDIES ON SORDARIA HUMANA (FUCKEL) WINTER: THE CYTOLOGY OF ASCUS DEVELOPMENT AND DEVELOPMENTAL MORPHOLOGY OF PERITHECIUM
ABSTRACT:
Studies on the cytology and developmental morphology of Sordaria humana revealed that the ascognia arise as coiled multinucleate side branches without trichogyne. No antheridium was observed though anastomoses were noted between somatic hyphae. Thearchicarp consists of 4-12 binucleated cells. The peridium and sterile elements of the centrum develop from the hyphae arising from the subtending hypha of the ascogonium. The peridium consists of an outer ex- operidium of dark, thick-walled cell; and an inner endoperidum of hyaline, thin-walled cells. A third layer, the perilocular layer, is instrumental in the formation of the neck and ostiole, which develops schizogenously. Ascogenous hyphae develop from the cells of the ascogonium. The asci develop from the ascogenous hyphae in the usual m nner. The centrum is "Diaporthe” type in the sense of Parguey-Leduc, the asci forming a fascicle on a ridge at the base of the centrum.

SOMATIC MITOSIS IN THE CHALARA STAT E OF THIELAVIOPSIS PARADOX A (DE SEYNES) HOHNEL
ABSTRACT:
Vegetative nuclear division in the Ch.ala.ra state of Thielaviopsis paradoxa was studied and illustrated by time-lapse, phase contrast microscopy. During this process, the chromatinic material and the nucleolus divide by elongation and constriction comparable to that

SOME GROWTH PROPERTIES OF HAPLOID AND DIPLOID STRAINS OF PROTO MYCES INUNDATUS
ABSTRACT:
The fungus Protomyces inundatus Dangeard grows readily in liquid culture, budding in a yeast like fashion. Glucose saturation constant is 0.45 X 10-5M, while the maximum exponential growth rate is 0.136 divisions per hour. T liamine is required for g -owth and it can not be replaced with pyrimidine or thiazole moieties when present in the medium alone or simultaneously. This fungus can utilize a number of nitrogen or carbon sources. No differences are found in the haploid and diploid strains for the growth properties studied. The differences in the behaviour of nucleic acids in haploid and diploid strains are discussed in the light of this new investigation.

ON THE SPORES (INCLUDING GERMINATING SPORES) OF HORNE OPHYTON {HORNEA) LIGNIERI (KIDSTON & LANG) BARGHOORN & DARRAH (1938)
ABSTRACT:
Spores isolated from the sporangium ot Horneophyton lignieri have been examined and their morp’.aology have been described and compared with di parsed spore types. A single sporangium of the plant contain two types of spores. Information has been obtained regarding their size ranges and variations under different conditions of preparation. Germinating spores originally reported by Lyon (1957) have been re-investigated and few of them have bjon ideitifi jI as belo o»ing to Hormop'iyton lignieri. Probable early developmental stages of gametophytes

SOME STUDIES ON THE FUNGI OF KALLAR GRASS (DIPLACHNE FUSCA (L.) P. BEAUV.) COMPOST
ABSTRACT:
Both thermophilic and mesophilic fungi have been isolated from an experimental kallar grass (Diplachne fused) straw compost. The occurrence of these fungi has been correlated to the variation in temperature and pH of the compost. The decomposition of kallar grass has been studied by the sequential estimation of dry matter. Humus has also been estimated curing the composting of kallar grass cuttings.

SOME OBSERVATIONS ON MYCORRHIZAE OF OLEA CUSPIDATA WALL.
ABSTRACT:
Mycorrhizae were found on the specimens of Olea cuspidata Wall., collected from the scrub forest in the Salt Range west of Jhelum in the foot hills of the Himalayas. Mycorrhizal root system was hetei'orrhizic. Both ectomycorrhizae and endomycorrhizae were found on the same plant but on different roots. Eniomycorrhizae were covered with a 20-30 (A thick, parenchymatous and smooth mantle of fungus. No hartig net was observed. In endomycorrhizae the cortex con- tained an abundince of thick walled vesicles and coils of aseptate hyphae, characteristics of Vesicular Arbuscular Mycorrhizae caused by Endogone fasciculata. No Endogone spores were recovered from soil around olive

ANATOMY OF REGENERATING ROOT SEGMENTS OF TARAXACUM OFF ICINALE WEB.
ABSTRACT:
A detailed study of the anatomy of proximal and distal ends of regenerating Taraxacum officinale root cutting was undertaken. It was found that cell division began just below the cut ends of the root segments after 24 hr. of regeneration. At the proximal end, shoot meristems were distinguished at 48 hr. in a narrow zone around the xylem core. Later on callus growth followed, carrying the new shoots upwards. Xyle n. strands differentiated basipetally through the secondary phloem at seventh day. At the distal end, xylem nodule appeared at the fourth day of regeneration in a wide zone across the secondary phloem. Callus growth followed later and meiistem appeared in the callus, distal to the xylem nodule, after two weeks. The young shoot and root meristem had identjcal appearance.

DIFFERENTIAL TOLERANCE WITHIN CERTAIN CRUCIFEROUS
ABSTRACT:
The selectivity of Vegadex, CIPC, Dymid and Treflan was studied with six members of cruciferous crops, viz. head cabbage, cauliflower, chinese

STARCH-FILLED NODULAR HYPERTROPHIES IN TRIBULUS TERRESTRIS
ABSTRACT:
Short communication - No Abstract