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In order to promote the green, healthy and sustainable development of Platycodon grandiflorus industry, the current situations of P. grandiflorus industry development in Shandong Province were analyzed. That is, an advantageous area has been gradually formed; product processing is diversified; industrialization development pattern is gradually emerging. Three problems in the development of P. grandiflorus industry were deeply analyzed. That is, it is difficult to control product quality; the problem of soil obstacles to continuous cropping is serious; the problem of talent shortage is prominent. Four countermeasures for the next development were put forward as follows: increasing government support, strengthening the construction of talent team, implementing crop rotation or intercropping, and increasing technology promotion. [ABSTRACT FROM AUTHOR]

With seeds as experimental materials, MS was used as the basic medium to combine different species and concentrations of auxin and mitogen for proliferation, elongation and rooting culture. The best combination of medium and the most suitable medium were selected. The results showed that the best formula for the medium was MS + 0. 5 mg/L BA + 0. 5 mg/L IAA + 30 g/L sucrose in the proliferation culture, MS + 0. 25 mg/L BA + 0. 5 mg/L IAA + 30 g/L sucrose in the elongation culture, and MS + 0. 5 mg/L IAA + 20 g/L sucrose in the rooting culture respectively. The experimental results will be applied in the rapid propagation and breeding of high-quality seedlings of Platycodon grandiflorus. [ABSTRACT FROM AUTHOR]