The experiment was conducted to determine the effects of enhanced UV-B on growth and differential responses among cultivars in soybean. The soybean cultivars subjected to enhanced UV-B irradiation at daily dose of 11.32 kJ m^-2(UV-B_BE) revealed that the growth was significantly depressed. Plant height, leaf number, leaf area and dry weight were inhibited by UV-B irradiation showing differential responses among cultivars used. Danyeubkong seems to be less sensitive to the enhanced UV-B irradiation, while Keunolkong more sensitive. Reduction of chlorophyll content was also found significantly greater to Keunolkong. Specific leaf weight, an index of leaf thickness, and flavonoid content known as UV-absorbing compounds were significantly increased in Danyeubkong by UV-B, but those in the other cultivars were not significantly affected. The results indicated that there are cultivar differences in the growth and physiological responses to the enhanced UV-B irradiation and specific leaf weight and UV-absorbing compounds in the leaves were highly related to the sensitivity of soybean by UV-B irradiation.

• 김학윤(경북대학교 농업과학기술연구소) | Hak-Yoon Kim (Institute of Agricultural Sciences and Technology, Kyungpook National UVniversity)
• 이천호(경북대학교 농학과) | Chen-Ho Lee (Dept. of Agronomy, Kyungpook National University)
• 이인중(경북대학교 농업과학기술연구소) | In-Jung Lee (Institute of Agricultural Sciences and Technology, Kyungpook National UVniversity)
• 신동현(경북대학교 농학과) | Dong-Hyun Shin (Dept. of Agronomy, Kyungpook National University)
• 김길웅(경북대학교 농학과) | KiI-Ung Kim (Dept. of Agronomy, Kyungpook National University)