Streptanthus tortus의 培養細胞로부터 사부 세포의 분리와 분리된 篩部 및 柔組織 細胞에서 설탕의 능동수송

Isolation of Phloem Cells and Active Transport of Sucrose by Isolated Phloem and Parenchyma Cells of Streptanthus tortus Suspension Cultures

  • 조봉희 (수원대학교 자연과학대학 생명과학부)
  • 발행 : 1998.01.01

초록

Streptanthus 조직 배양 세포를 사용하여 사부를 순수분리 시키고, 분리된 사부에서 사부 하적에 대한 기작을 규명하기 위해 다음 연구를 하였다. 유조직 세포는 0.2% macerase 와 0.03% cellulase의 가수분해 효소로 처리하여 원형질체를 얻었고, 분화된 세포에서는 0.03% cellulase + 0.02% pectinase + 0.2% macerase + 0.025% rohamet PC로 가수분해시켜서 순수한 사부 세포와 사부 원형질체와 반세포의 원형질체를 분리하였다. 분리된 유조직 세포와 반세포의 원형질체에서는 단당류인 포도당을 수송시키나, 설탕은 수송시키지 못했다. 반면 분리된 사부 세포는 설탕을 능동수송 시키나 포도당은 수송시키지 못했다. 이는 설탕의 사부 하적은 반세포 없이도 가능하며, 반세포는 설탕 운반체가 없어서 설탕을 직접 수송할 수 있는 능력이 없다는 것을 보여주는 것이다. 그리고 사부 세포에서 설탕의 수송은 에너지대사에 의존하는 능동수송으로 나타났다.

Protoplasts were isolated from the parenchyma supension cultured cells of Streptanthus tortus using hydrolytic enzymes, 0.03% cellulase + 0.02% pectinase. Phloem cells and companion protoplasts were isolated from differentiated suspension cultured cells using hydrolytic enzymes, 0.2% macerase + 0.03% cellulase + 0.02% pectinase + 0.025% rohamet PC. Isolated parenchyma -and companion- protoplasts transported glucose into the cells, but not transported sucrose at all. On the other hand, isolated phloem cells transported sucrose into the cells actively, but not transported glucose. These results show for the first time that loading of sucrose into the phloem cells without nucleus was possible without contributing of companion cells and companion cells had not the ability to transport sucrose directly because of lack of sucrose carriers in the membrane. The sucrose transport into the isolated phloem cells depend on metabolic energy.

키워드

참고문헌

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