Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Changes of Root Physiology of Tissue Cultured M.9 Apple Rootstock after Layering

기내 배양 사과 대목 M.9의 순화 후 휘묻이 번식 시 발근 관련 생리적 특성 변화

  • Published : 2005.09.01
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Abstract

This work was conducted to evaluate the effects of rooting on tissue cultured M.9 (Malus domestica Bork. cv, tcM.9) after layering in field. We investigated an appearance period of first root in shoot, rooting ratio, contents of indole-3-acetic acid (IAA), abscisic acid (ABA), inorganic matters, sugars, and lignin in rooting areas of stems by layering. First root in shoot of tcM.9 and natural M.9 appeared 25 and 30 days after layering (DAL), respectively. Rooting ratio was much higher in tcM.9 than in natural M.9. The content of IAA was higher in tcM.9 than in natural M.9 before layering, but it was reversed at 20 and 30 DAL. In contrast, the content of ABA was much higher in natural M.9 than in tcM.9 in case of both before and 10 and 20 DAL. The contents of N, B, Mn, and Zn were significantly higher in tcM.9 than in natural M.9 both before and 10 and 20 DAL. The contents of sugars in tcM.9 had the similar pattern of the contents of inorganic materials. There were statistically significant differences in the contents of sucrose and glucose at 30 DAL as well as the content of maltose at 20 and 30 DAL. The content of lignin was significantly higher in tcM.9 than in natural M.9 before layering and 10 and 30 DAL while there was no difference 20 DAL. Therefore, improvement of rooting ability in the tissue cultured root stock M.9 might be due to the changes of inorganic matters or lignin rather than that of sugars and hormones.

본 실험은 사과 왜성대목 M.9 조직배양묘를 12회 이상 계대배양 시켜 발근, 순화 후 포장에서 휘묻이에 의해 번식을 할 경우, 복토된 발근 예정 부위의 호르몬, 무기성분 등의 변화와 발근에 미치는 영향을 보고자 실시하였다. 휘묻이 후 첫 부정근 출현 일수는 기내유래 M.9는 25일, 일반 M.9는 30일이었다. 발근율은 기내유래 M.9는 100%였으며 일반 M.9는 83%였다. 휘묻이 할 줄기 부분의 IAA 함량은 기내유래 M.9가 일반 M.9에 비해 높았으나 휘묻이 20일 및 30일 후에는 일반 M.9가 더 높았다. 그러나 ABA 함량은 일반 M.9가 휘묻이 직전, 10일 후 및 20일 후의 기내유래 M.9에 비해 훨씬 더 많았다. 기내 유래 대목의 질소, 붕소, 망간, 아연의 함량은 모두 일반 M.9 보다 유의하게 많았다. 기내유래 대목의 sucrose, glucose, fructose, maltose 함량과 일반 기외대목의 함량 간에는 유의성이 인정되지 않았다. 기내 유래 및 일반 M.9 대목의 리그닌 변화는 휘묻이 전, 10일 후, 30일 후에는 고도의 유의성이 인정되었다. 그러므로 기내유래 대목의 발근력의 증가는 당류와 호르몬의 함량 변화 보다는 무기성분과 리그닌 함량 변화에 더 많이 기인하는 것으로 보인다.

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