未熟種子培養에 의한 벼 耐鹽性의 조기검정 = Early Test of Salt Tolerance by Immature Seed Culture in Oryza sativa L.

다국어 초록 (Multilingual Abstract)

The mechanism of salt tolerance in rice was investigated by comparing various varieties differing in salt sensitivity. Immature seeds after 3-12 days of flowering were cultured on MS media supplemented with 0-1.2% NaCl. Most immature seeds cultured after 3 days of flowering were changed to brownish color and died soon. In immature seed culture(after 6 days of flowering) of Taebaekbyeo and Chilseongbyeo as the salt sensitive cultivar, the germination rate did not decrease in comparison with the salt tolerant cultivars. Seedling height and root length were influenced more than 0.6% NaCl concentration regardless salt sensitivity and decreased in early stage of ovary. After immature seeds(after 6 days or 9 days of flowering) were cultured on media with high concentration of 1.2% NaCl, they-were compared with the control in seedling height. Taebaekbyeo(in immature seed culture after 6 days of flowering) and Chilseongbyeo(in immature seed culture after 9 days of flowering) as salt sensitive cultivar were reduced 80% and 86%,respectively, HP 3319-2wx-6-3-1 as the salt tolerant cultivar were diminished 78%(in immature seed culture after 6 days of flowering) and 72%(after 9 days of flowering) in seedling height. Above all, Chilseongbyeo as a salt sensitive variety was showed remarkably the seedling height reduction during 1.2% NaCl stress in immature seeds of 9 days after flowering in comparison with the control.