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수분 스트레스가 담배의 잎 수분 포텐셜, 광합성 및 뿌리발달에 미치는 영향 KCI 등재

Effects of Water Stress on Leaf Water Potential, Photosynthesis and Root Development in Tobacco Plant

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한국작물학회지 (Korean Journal of Crop Science)
한국작물학회 (Korean Society Of Crop Science)
초록

Development of shoot and root, leaf water potential and photosynthetic rate affected by water stress in early growing stage of tobacco were surveyed to interpret stress response in terms of plant physiological and agricultural aspects. The growth of shoot and root was highly suppressed by water stress and the difference in dry weight by rewatering was smaller in root than in shoot. The total root length was highly decreased by water stress and the lengths of root for water stress and non-stress were 74m and 84m, respectively, after rewatering. The root growth treated by water stress was increased between 2nd and 3rd day after treatment indicating that temporary water stress at early growing stage might have increased of root zone activity for early growth stage. The leaf water potentials were decreased to -7.63MPa, -9.47MPa, -11.89MPa, -13MPa at the 2nd, 3rd, 4th and 5th day by water stress. The relative water contents were 75%, 62% and 57% at the 3rd, 4th and 5th day after treatment. Photosynthesis was reduced largely by water stress. The photosynthetic rate after treatment at 2nd day and 3rd day was dropped to 18.15~mu mol. CO2 /m2 ㆍsec-1 and 9.35~mu mol. CO2 /m2 ㆍsec-1 . It was never recovered to the normal, even after rewatering. Stomatal conductance had been reduced since 2nd day after treatment and increased after rewatering.

저자
  • 이상각(고려대학교 자연자원대학 식량자원학과)
  • 서용원(고려대학교 자연자원대학 식량자원학과)
  • 제리 존슨(미국 죠지아대학)
  • 강병화(고려대학교 자연자원대학 식량자원학과)