Effects of gamma ray on Chrysanthemum tea var. Hangzhou
1985
Sermsiri Eiamfang | Oradee Sahavacharin (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Horticulture)
There were three varieties of chrysanthemum tea grown in Thailand, the diploid local variety which had small flower with a bitter taste; the tetraploid local variety; and the newly introduced variety from China "Hangzhou" which had large flower and a pleasant taste but was susceptible to disease. All varieties bloom in short-day condition during the months of September to December. At this time, the quality of the flower dropp1453ed due to the rainy season. Thus improvement of varieties by conventional breeding was not practical. In this study, the effect of gamma ray on chrysanthemum tea plants was investigated. Shoot tips of "Hangzhou variety were treated with acute radiation of gamma ray at dose of 0, 1, 2 and 3 Krad before planting. It was found that the higher dose of gamma ray, the slower root formation and the lower survival rate were obtained. Further more, gamma ray caused abnormality of leaf morphology, length of internode and shoot differentia
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