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KMID : 1024519980070040487
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Journal of the Environmental Sciences
1998 Volume.7 No. 4 p.487 ~ p.492
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Intraspecific Differences in Sensitivity to UV-B Irradiation in Soybean [Glycine max(L.) Merrill]
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Kim Hak-Yoon
Lee Chen-Ho
Lee In-Jung
Shin Dong-Hyun
Kim Kil-Ung
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Abstract
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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 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 W-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 diferences in tile growth and phisiological 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.
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KEYWORD
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growth, pigments, soybean, ultraviolet-B radiation
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