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Comparison of Physiological Characteristics, Stomata and DNA Content between Seedling and 5-year-old Somatic Plant (Somatic Embryo Derived-plant) in Liriodendron tulipifera

백합나무 5년생 실생묘 및 체세포묘 (체세포배 유래 식물체) 간의 생리적 요인, 기공 및 DNA 함량 비교

  • Kim, Yong Wook (Division of Forest Biotechnology, Korea Forest Research Institute) ;
  • Moon, Heung Kyu (Division of Forest Biotechnology, Korea Forest Research Institute)
  • 김용욱 (국립산림과학원 산림생명공학과) ;
  • 문흥규 (국립산림과학원 산림생명공학과)
  • Received : 2013.07.02
  • Accepted : 2013.09.27
  • Published : 2013.12.31

Abstract

Field performance of somatic plants (somatic embryo derived-plants) of yellow-poplar (Liriodendron tulipifera) produced from somatic embryogenesis was compared with that of seedlings at age 5. In comparison of photosynthetic rate (seedling, $10.67{\mu}mol$ $CO_2m^{-2}s^{-1}$; somatic plant, $9.04{\mu}mol$ $CO_2m^{-2}s^{-1}$), stomatal conductance rate (seedling, 0.2 $H_2Om^{-2}s^{-1}$; somatic plant, 0.166 $H_2Om^{-2}s^{-1}$) and respiration rate (seedling, 1.71 mmol $H_2Om^{-2}s^{-1}$; somatic plant, 1.513 mmol $H_2Om^{-2}s^{-1}$), no significant differences were found between plants. The seedlings were a little higher in comparison of stomatal density (seedling, $23.33/mm^2$; somatic plant, $22.43/mm^2$), length (seedling, $25.83{\mu}m$; somatic plant, $23.46{\mu}m$) and width (seedling, $15.87{\mu}m$; somatic plant, $15.3{\mu}m$). In comparison of DNA content of the leaves using flow cytometry, no differences in ploidy level were found between the seedlings and somatic plants.

본 연구는 백합나무 5년생의 실생묘와 체세포묘 간 생리적 요인, 기공 특성 및 DNA 함량 비교를 위해 수행되었다. 광합성율 비교의 경우 실생묘는 $10.67{\mu}mol$ $CO_2m^{-2}s^{-1}$, 체세포묘는 $9.04{\mu}mol$ $CO_2m^{-2}s^{-1}$, 기공전도율의 경우 실생묘가 0.2 mol $H_2Om^{-2}s^{-1}$, 체세포묘가 0.166 mol $H_2Om^{-2}s^{-1}$, 또한 증발산율 비교에서는 실생묘가 1.71 mmol $H_2Om^{-2}s^{-1}$, 체세포묘는 1.513 mmol $H_2Om^{-2}s^{-1}$로 각각 나타나 별 차이가 없었다. 기공밀도(실생묘, 23.33개/$mm^2$; 체세포묘, 22.43개/$mm^2$), 기공길이(실생묘, $25.83{\mu}m$; 체세포묘, $23.46{\mu}m$) 및 기공 폭(실생묘, $15.87{\mu}m$; 체세포묘, $15.3{\mu}m$)비교에서는 모든 실생묘가 체세포묘 보다 수치가 다소 높게 나타났다. Flow cytometry를 이용한 엽조직의 DNA함량 비교에서도 실생묘와 체세포묘간에는 차이가 없었다.

Keywords

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