Constant Ratios of Total Chloroplast Volume to Cell Volume in Tobacco and Arabidopsis thaliana at Various Developmetal Stages

담배와 애기장대의 발달단계에 따른 세포부피에 대한 엽록체의 총 부피의 일정한 비율

  • 정원중 (한국생명공학연구원 식물세포공학연구실) ;
  • 박연일 (충남대학교 생물학과) ;
  • 박주현 (한국생명공학연구원 식물세포공학연구실) ;
  • 민성란 (한국생명공학연구원 식물세포공학연구실) ;
  • 유장렬 (한국생명공학연구원 식물세포공학연구실)
  • Published : 2001.11.01


The relationship among leaf size, leaf protoplast (cell) size, chloroplast size, and chloroplast number were investigated in tobacco and Arabidopsis thaliana at various developmental stages. In tobacco, protoplasts, less than 15.6 ${\mu}{\textrm}{m}$ in diameter had less than 20 chloroplasts, 0.93 ${\mu}{\textrm}{m}$ in thickness and 3.3 ${\mu}{\textrm}{m}$ in length on average. As protoplast size increased from 30 ${\mu}{\textrm}{m}$ to 45 ${\mu}{\textrm}{m}$ in diameter, chloroplast size remained the same (1.57 ${\mu}{\textrm}{m}$ in diameter and 5.55 ${\mu}{\textrm}{m}$ in length on average), but chloroplast number increase from 42 to 101 on average. A similar relationship was also observed in A. thaliana. The ratio of total chloroplast volume to protoplast volume was constant (0.105 in tobacco and 0.325 in A. thaliana) over various developmental stages.


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