Micropropagation of Stevia by Tissue Cultures in a Temporary Immersion System

Authors

  • Kittisak Chotikadnachanarong ภาควิชาชีววิทยา คณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยราชภัฏเชียงใหม่

Abstract

The aim of this study was to evaluate the temporary immersion bioreactor in multiplication of Stevia. The first factor was the immersion frequencies. Nodal explants were fed with liquid MS medium for 3 minutes each 3, 4, 6, 8 and 12 hours. Cultivate for 4 weeks. It was found that the 3 hours immersion frequency had the highest average dry weight of 40.8 mg and the highest average shoot number was 3.6 shoots per explant with statistically significant difference at 0.05. To study effects of immersion time in TIG. Cultures were immersed in medium for 1, 3, 5, 7 and 10 minutes, every 3 hours in TIG for 4 weeks. It was found that the 3 minutes immersion time showed the highest average dry weight and the average number of shoots with significantly difference higher than the other treatments, 40.5 mg and 3.6 shoots per explant respectively. To compared of different in vitro micropropagation methods of Stevia. In vitro explants were cultured in TIG by 3 hours immersion frequency with a 3 minutes immersion, liquid medium at 110 rpm speed shaker and agar medium in light condition 16 hours per day at 25°C cultured for 4 weeks. The results show that the cultured in the immersion system showed the highest average dry weight 40.5 mg which more than cultured in liquid medium and agar medium with statistically significant difference at 0.05. While, cultivation in TIG and agar medium provides a nonsignificant difference in the average number of 3.6 and 3.1 shoots per explant and liquid medium produced the lowest average number of shoots with statistically significant difference at 0.05. Therefore, the cultivation of stevia explant in TIG which is an alternative to application for the production of stevia at the industrial level. Keywords :  stevia, propagation, plant tissue cultures, temporary immersion system

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Published

2020-01-15