GAMMA RAYS INDUCED MUTAGENIC STUDIES IN CATHARANTHUS ROSEUS (L.) G. DON., AN IMPORTANT ORNAMENTAL PLANT

A study was conducted to estimate the effect of gamma rays on growth and yield traits in periwinkle (Catharanthus roseus (L.) G. Don), an important horticulture plant. The seeds were treated with different levels of gamma rays (20, 25 and 30). Morphological parameters were analysed on the 30th day, like plant height, days of first flower, plant height, fresh weight per plant, dry weight per plant, root fresh weight per plant and root dry weight per plant. The morphological parameters were decreased with increasing levels of gamma rays doses

Gamma Radiation influence on Growth, Biochemical and Yield Characters of Cajanus cajan (L.) Millsp.

The present investigation deals with the effect of gamma radiation on growth, Biochemical and yield traits of Pigeon pea. The seeds of Pigeon pea Var.CO-7 were treated with different doses of gamma rays like 15, 20 and 25KR. The treated seeds were sown in field along with control to raise M1 generation and the radiation effects was noted from seed germination percentage, seedling survival (%), seedling height on 30th days, Days to first flower, plant height, (at maturity), number of branches, number  of leaves, number of cluster, pollen viability (%), number of pods, seed yield, hundred seed weight (g), fresh and dry weight (g), Seed viability (%) and seed protein content (%). The results indicates that the growth, biochemical and yield parameters were gradually decreased when compare to control and the highest reduction was noted at higher doses of gamma radiation treatments. The pollen and seed viability (%) analysis were also reveled that gradually reduction in lower to higher doses of gamma rays treatments

A comparison of the effects of physical and chemical mutagens in sesame (Sesamum indicum L.)

Three sesame genotypes (Rama, SI 1666 and IC 21706) were treated with physical (γ-rays: 200 Gy, 400 Gy or 600 Gy) or chemical (ethyl methane sulphonate, EMS: 0.5%, 1.0%, 1.5% or 2.0%) mutagens and their mutagenic effectiveness and efficiency were estimated in the M 2 generation. The M 3 generation was used to identify the most effective mutagen and dose for induction of mutations. The average effectiveness of EMS was much higher than γ-rays. The lowest dose of γ-rays (200 Gy) and the lowest concentration of EMS (0.5%) showed the highest mutagenic efficiency in all genotypes. Analysis of the M 3 generation data based on parameters such as the variance ratio and the difference in residual variances derived from the model of Montalván and Ando indicated that 0.5% concentration of EMS was the most effective treatment for inducing mutations

Effect of EMS on induced morphological mutants and chromosomal variation in Cowpea (Vigna unguiculata (L.) Walp)

ABSTRACT Effect of EMS (ethyl methane sulphonate) on induced morphological mutants and chromosomal variation in cowpea was studied using five different doses of mutagen along with a control in randomized blocked design with three replications. The morphological mutants there are two types of viable and chlorophyll mutants. Viable mutant contains tall, dwarf, early maturity, late maturity, leaf mutants pod mutant and flower mutants. The frequency of chlorophyll mutant contains albino, xantha and viridis. This concentration can damage or modify important components of plant cells and have been reported to affect the morphology, anatomy, biochemistry and physiology of plants differentially depending on the concentration level. These effects include changes in the cellular structure and metabolism of the plants e.g., dilation of thylakoid membranes, alteration in photosynthesis, modulation of the antioxidative system and accumulation of phenolic compounds. The morphological and chromosomal variation was found to be mutagen sensitive in somatic cells of cowpea. It was found to increase with increasing the concentration of EMS in Cowpea plants. The chemical mutagen like ethyl methane sulphonate induces high frequency of chromosomal changes like anaphasic bridge; anaphasic laggard, anaphasic bridge and clumbing of chromosome were including control plants also observed

Induced on chemical mutagens in Bhendi, Abelmoschus esculentus l. moench

Abstract The seeds of Bhendi (Abelmoschus esculentus L. Moench) variety Arka Anamika were subjected to the chemical mutagens. The investigation using ethyl methane sulphonate (EMS) and diethylsulphate (DES) on various morphological and yield parameters in M 1 generation were studied in morphological and yield characters, economic importance and medicine use recorded significant reduction and significant variation among the Bhendi cultivars were observed in germination, days to first flower, plant height, number of fruits per plant, fruit length per plant, seed yield per plant, 100 seed weight, fresh weight and dry weight per plant showed variability for both mutagens of all concentration in Bhendi

Visible Light Induced Photocatalytic Degradation of Methylene Blue using Polyaniline Modified Molybdenum Trioxide

International audiencePolyaniline/Molybdenum trioxide composite was prepared by a chemical oxidative polymerization method. The obtained Polyaniline/Molybdenum trioxide composite was characterized by X-ray diffraction analysis (XRD), Fourier transform infrared (FT-IR) spectroscopy and transmission electron microscopy (TEM). The XRD pattern showed the diffraction peaks to be in good agreement with the structure of MoO3. The obtained results confirm the successful formation of the Polyaniline/Molybdenum trioxide composite. Finally, the composite was employed as photocatalyst for the photodegradation of methylene blue under visible light irradiation. Further the photodegradation mechanism also discussed in detail