LONGEVITY AND CATALASE ACTIVITY IN TWO BRUCHID SPECIES

Abstract

Of the two species, Caryedon serratus and Callosobruchus maculatus, the formar had higher median and maximum life spans. The males were characterized by high life expectancy and low age independent susceptibility to deaths although the ageing rate was high only in the males of C. maculatus. At all ges, the catalase level was higher in both the seses of C. serratus than in C. maculatus. in the males of C. maculatus of C. serratus than in C. maculatus. The former had higher by high life expectancy eing rate was high only. At all ages, the catalase level was higher in both the Sexes.

Keywords:

Carydon serratus, Callosobruchus maculates, Longevity, Catalase

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QUANTITATIVE CHANGES IN THE TRIGLYCERIDE CONTENT OF POST EMBRYONIC STAGES OF EPILACHNA VIGINTIOCTOPUNCTATA (FABR. : COLEOPTERAN : COCCINELLIDAE)

Abstract

 The triglyceride content showing fluctuations in the first three larval instars under goes significant continuous rise in the three phases of fourth larval instar larva and prepupa. There occurs a decline during metamorphosis. However the amount increases in 0 hr adult stage.

Keywords:

Triglycerides in embryogenesis, Coleoptera

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ANTIFUNGAL ACTIVITY OF THERMOPHILIC FUNGUS MALBRANCHEA PULCHELLA VAR. SULFUREA

Abstract

The antifungal activity of six isolates of Malbranchea pulchella var. sulfurea was assayed against four different test organisms viz. Acremonium alabamensis, Humicola lanuginosa, Thermoascus sp. and Thermomucor indicae-seudaticae in agar medium, Among six isolates of Malbranchea, APMO6 was found to give better yield of anti-fungal component .The effect of different factors on the production of anti-fungal component is discussed.

Keywords:

Thermophilic fungi/ Antifungal activity of Malbranchea

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SECRETION OF PECTIC ENZYMES BY ALTERNARIA SOLANI AND ALTERNARIA TRITICINA

Abstract

The present study deals with the effect of monosaccharide (Glucose) and polysaccharide (Starch) on the production of pectic enzymes (endo-PGTE, endo-PMTE, endo-PG. endo-PMG and PME) in the inoculum of Altarnaria solani on tomato and Altarnaria triticina on wheat in modified Richard's culture medium. Secretion of pectic enzymes as stimulated with monosaccharide by both pathogens but in case of polysaccharide the secretion of pectic enzymes was repressed by both pathogens under similar conditions. The stimulation and repression of pectic enzymes by Alternaria solani and Alternaria triticina depend not only on the nature of pathogen and the host but on the structure of carbo-hydrates.

Keywords:

Pectic enzymes, Effect of carbohydrates on enzymes

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