Abstract
Significant efforts are being directed towards the improvement of rice using genetic manipulations. A good and reproducible system for recovering fertile Indica rice plants is imperative. The aim of this study was to study the influence of initial cell density on growth dynamics of suspension cultures. The cultures were initiated from 3-week-old embryogenic calli derived from mature seeds of Indica rice cultivars ASD16 and Pusa basmati. Growth kinetics of the rice cell suspensions were measured and the obtained data reveal that viable cells at 3% PCV using 20ml liquid (N6D) medium and sub-culturing at 7-day intervals resulted in rapid increase in fresh and dry weightsand the embryogenic competency of the cells were found to be high. The growth kinetics analysis revealed that ASD16 showed better efficiency for high frequency and viable somatic embryo formation as compared to Pusa basmati. The technique was found to be suitable for developing somatic embryos for both cultivars ASD16 and Pusa basmati, which can be used for many important applications including micropropagation and secondary metabolites production.
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