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    EFFECTS OF COLCHICINE APPLICATION AND PLOIDY LEVEL ON FRUIT SECONDARY METABOLITE PROFILES OF GOLDENBERRY (PHYSALIS PERUVIANA L.)
    (Aloki Applied Ecological Research And Forensic Inst Ltd, 2020) Comlekcioglu, N.; Ozden, M.
    The aim of this study was to investigate changes of phenolic accumulation and antioxidant potential of goldenberry fruits collected from diploid plants, under colchicine treatments of different doses and exposure time, including colchicine induced synthetic tetraploid plants. Three colchicine application methods were utilized; i) immersion of seeds in colchicine solution at concentrations of 0.0, 0.6, 0.9% for 24 h and 36 h; ii) keeping germinated seeds (with 2-3 mm long roots) in a colchicine solution with concentrations of 0.6% and 0.9% for 24 h iii) incubation of seeds on semi solid nutrient medium containing 0 6% and 0.9% colchicine for 14 and 21 days. Total antioxidant activity of fruits varied according to the dose and exposure time of colchicine applications. The most important change was observed in the fruits of plants that turned tetraploid as a result of colchicine applications. Tetraploid fruits generally produced higher amounts of secondary compounds compared to diploid progenitors and their antioxidant capacity was also higher. However, the results show that polyploidization is important but cannot be generalized as a strategy to increase secondary metabolite production. It was determined that the relationship between total anthocyanin and total phenolic content with antioxidant capacity of fruits was significant and parallel. We suggest the use of the lowest colchicine concentration tested. 0.6% colchicine to enhance metabolite production cannot be generalized.
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    Polyploidy induction by colchicine treatment in golden berry (Physalis peruviana), and effects of polyploidy on some traits
    (Pakistan Agricultural Scientists Forum, 2019) Comlekcioglu, N.; Ozden, M.
    Goldenberry (Physalis peruviana L) an important small fruit that is growing rapidly around the globe. Different colchicine treatments (0.0, 0.3, 0.6, and 0.9% w/v) were used to induce tetraploidy in goldenberry plants. Three colchicine treatment methods were evaluated; i) immersion of seeds in colchicines solution, ii) immersion of germinated seeds (with roots about 2 mm long) in colchicine and iii) incubation of seeds on semi solid Murashige and Skoog (MS, 1962) medium containing colchicines. Experiments were set up with three factors factorial experimental design with three replicates, where the colchicine application method was the main factor of variation, the concentrations was the secondary factor and the exposure time was the third factor. Twenty seeds for each treatment, with three replications were used. Diploid plants grown from untreated seeds were used as controls. The incubation of seeds on colchicine containing MS medium was found to be the only effective method and tetraploid plants were produced in this way. The highest tetraploidy was achieved by adding 0.06 and 0.09% colchicine to MS medium. An exposure time 21-30 d was sufficient to produce tetraploid plants. Ploidy determination was made by flow cytometry. The polyploidization rate ranged between 4.1-58.8%. Tetraploid plant could not be obtained from other treatments. Statistical analysis was not performed since data could not be obtained from the lowest groups. The induced tetraploid plants were with larger plants, fruits, leaves, and stomata, higher chlorophyll content and lower stomata density compared to diploid control plants. The results have shown that colchicine should be added to the in vitro culture medium at least 0.6% and 0.9% doses and the seeds should be cultured for at least 30 days. An analysis of variance (two sample T-test) was performed at the 5% significance level to comparison of the morphologic characteristics of diploid and tetraploid plants. © 2019, Pakistan Agricultural Scientists Forum. All rights reserved.
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    POLYPLOIDY INDUCTION BY COLCHICINE TREATMENT IN GOLDEN BERRY (PHYSALIS PERUVIANA), AND EFFECTS OF POLYPLOIDY ON SOME TRAITS
    (Pakistan Agricultural Scientists Forum, 2019) Comlekcioglu, N.; Ozden, M.
    Goldenberry (Physalis peruviana L) an important small fruit that is growing rapidly around the globe. Different colchicine treatments (0.0, 0.3, 0.6, and 0.9% w/v) were used to induce tetraploidy in goldenberry plants. Three colchicine treatment methods were evaluated; i) immersion of seeds in colchicines solution, ii) immersion of germinated seeds (with roots about 2 mm long) in colchicine and iii) incubation of seeds on semi solid Murashige and Skoog (MS, 1962) medium containing colchicines. Experiments were set up with three factors factorial experimental design with three replicates, where the colchicine application method was the main factor of variation. the concentrations was the secondary factor and the exposure time was the third factor. Twenty seeds for each treatment, with three replications were used. Diploid plants grown from untreated seeds were used as controls. The incubation of seeds on colchicine containing MS medium was found to be the only effective method and tetraploid plants were produced in this way. The highest tetraploidy was achieved by adding 0.06 and 0.09% colchicine to MS medium. An exposure time 21-30 d was sufficient to produce tetraploid plants. Ploidy determination was made by flow cytometry. The polyploidization rate ranged between 4.1-58.8%. Tetraploid plant could not be obtained from other treatments. Statistical analysis was not performed since data could not be obtained from the lowest groups. The induced tetraploid plants were with larger plants, fruits, leaves, and stomata, higher chlorophyll content and lower stomata density compared to diploid control plants. The results have shown that colchicine should be added to the in vitro culture medium at least 0.6% and 0.9% doses and the seeds should be cultured for at least 30 days. An analysis of variance (two sample T -test) was performed at the 5% significance level to comparison of the morphologic characteristics of diploid and tetraploid plants.