Cytogenetic and physiological studies in natural populations of Torreya nucifera
1989
Kim, Y.D. | Kwon, Y.C. (Chinju National Agriculture and Forestry Jr. Coll., Chinju (Korea R.))
These studies were carried out to examine the anatomical, karyological characteristics, the variation of isozymes in needle and the frost damage of tissue for the purpose of investigating the relationships among the three natural Torreya nucifera populations of Chejudo, Namhae, and Mt. Naejang in Korea. The numbers of endodermal cells and inner layer cells of mucilage canal of needle conductive tissue were different in each population. The number of those of Chejudo population was the largest. In somatic chromosome, Namhae population showed one more secondary constriction. The values of b arm/a arm were the same in all the three populations, but Chejudo population particularly showed a different minimum value. And the karyotype formulas of each population showed different. During the meiosis, each population showed no significant difference in the irregular phenomena of chromosome. In isoperoxidase and esterase variations of needle, each population showed its particular number and variation of bands. Chejudo population showed the largest number and greatest variation of bands. Under the same freezing conditions, the frost damage of Mt. Naejang population was comparatively slight, and Chejudo population suffered from a greater frost damage than the others
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