Effect of IAA and Zeatin Riboside on Plantlet Induction from Leaf Disks of Solanum tuberosum L. and Variation of Regenerated Plants

IAA와 Zeatin Riboside가 감자의 엽절편체로부터의 식물체 유기 및 재분화개체의 변이에 미치는 영향

  • Park, Young-Doo (Department of Horticulture and Plant Metabolism Research Center, Kyung Hee University) ;
  • Boe, Arthur A. (Department of Plant Sciences, North Dakota State University)
  • Received : 2001.11.09
  • Accepted : 2001.11.23
  • Published : 2001.12.31

Abstract

Leaf disks from cultivar 'Kennebec' and one selection line (ND 860-2) were cultured on Murashige-Skoog medium with various combinations of indole acetic acid (IAA) and zeatin riboside. Shoots, roots and callus were induced at various combinations of plant growth regulator levels. The medium containing $3.5mg{\cdot}L^{-1}$ IAA and $4.0mg{\cdot}L^{-1}$ zeatin riboside produced the most plantlets. Rooted regenerants were grown in the greenhouse. The growth of regenerated plants obtained from the MS medium supplemented with $7.0mg{\cdot}L^{-1}$ IAA and $3.0mg{\cdot}L^{-1}$ zeatin riboside was significantly greater than those grown from nodal expalnts. In ND 860-2, a leaf chimera with chlorophyll deficient (light yellow) sectors was found in plants regenerated fiom leaf disks (grown on MS medium supplemented with $3.5mg{\cdot}L^{-1}$ IAA and $3.0mg{\cdot}L^{-1}$ zeatin riboside) but not in plants grown from nodal explants. The phenotypic variability was also observed in the tuber number, size and weight.

감자 품종 'Kennebec'과 육종 계통 ND 860-2의 잎 절편을 식물 생장조절제 indole acetic acid(IAA)와 zeatin riboside의 다향한 조합이 포함된 Murashige-Skoog 배지에서 배양하였다. 신초, 뿌리 및 캘러스가 다양한 식물생장조절제 조합으로부터 유기되었으며 두 품종 공히 $3.5mg{\cdot}L^{-1}$ IAA와 $4.0mg{\cdot}L^{-1}$ zeatin riboside를 포함한 배지에서 가장 많은 소식물체를 유기하였다. 뿌리가 유기된 재분화개체를 온실에서 재배한바 $7.0mg{\cdot}L^{-1}$ IAA와 $3.0mg{\cdot}L^{-1}$ zeatin riboside이 포함된 배지에서 재분화된 개체의 생육이 다른 처리구에 비해 유의성 있게 좋았다. ND 860-2의 경유 $3.5mg{\cdot}L^{-1}$ IAA와 $3.0mg{\cdot}L^{-1}$ zeatin riboside의 배지로부터 재분화된 개체의 잎에서 chlorophyll이 결핍되어 부분적으로 옅은 황색 부분이 나타나는 chimera를 발견하였으며 재분화개체로부터 tuber 수, 크기 및 무게 등 표현형의 변이가 나타났다.

Keywords