민들레 원예 작물화에 관한 연구

다국어 초록 (Multilingual Abstract)

(Abstract)
This study was conducted to investigate the basic siology of dandelions such as germination, storage, growth, wering etc. And this study was also conducted to investigate the ct of chitosan to germination, storage and growth of dandelion. The results were summarized as follows;


1. The germination-optimum temperature of Taraxacum officinale and T. laevigatum for germination was 20℃, and the germination rate was higher in light condition than in dark condition.

2. The germination rate of T. officinale and T. laevigatum kept high at 4℃ for 90days after storage. T. laevigatum has high germination rate till 60days after storage at -20℃.

3. The growth of both dandelions was increased with increasing pot diameter.

4. Fresh weight of T. officinale and T. laevigatum was increased under long-day length condition in heated greenhouse. The shoot growth was effected by day length rather than temperature, and growth of root vice versa. Water content of both dandelion was decreased under short-day length in unheated greenhouse.

5. Without cold treatment, the flowering of both dandelions was de under long-day length in heated greenhouse, while after cold treatment, the flowering was accelerated under long-day length in unheated greenhouse.

6. T. officinale tended to be high in germinating rate and low in contamination rate when the seed was coated by 0.1% solution of oligosaccharide molecule weight chitosan after seed disinfection.

7. The seed of T. officinale coated 0.5% by low molecule weight chitosan stored at 4℃ had good germination rate after disinfection.

8. The seeds coated by 1.0% of high molecule weight chitosan stored at 4℃ had high germination rate.

9. Folian spray of chitosan increased the growth of T. officinal and the 0.1% of oligosaccharide molecule weight of chitosan was most effective among various chitosan treatments.