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Effect of Phenylacetic Acid (PAA) on Embryo Formation in Anther and Microspore Culture of Paeonia lactiflora

작약의 약 및 소포자 배양에서 Phenylacetic Acid [PAA]가 배형성에 미치는 영향

  • Kwon, Yong-Sham (Department of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Shin, Young-Ae (Department of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Sohn, Jae-Keun (Department of Agronomy, College of Agriculture, Kyungpook National University)
  • 권용삼 (경북대학교 농과대학 농학과) ;
  • 신영애 (경북대학교 농과대학 농학과) ;
  • 손재근 (경북대학교 농과대학 농학과)
  • Published : 2002.09.01

Abstract

The objective of this study was to determine the effects of phenylacetic acid (PAA) on embryo production in anther and microspore culture of herbaceous peony (Paeonia lactiflora Pall.). The anthers of herbaceous peony were cultured on MS medium with 0 to 100 mg/L PAA according to two-step culture method. The ruptured anthers were transferred onto embryo formation medium without growth regulators. The MS medium with 2 mg/L PAA was effective in enhancing of direct embryogenesis and producing of normal embryo with two cotyledons from the cultured anthers. However, the increase of PAA concentration more than 5 mg/L PAA inhibited the embryo formation and promoted to callus formation from the anthers. The PAA affects significantly on the division of microspore and embryo formation in shed pollen culture and the best result was obtained from a medium supplement with 2 mg/L PAA. The preculture of anther for 10 days on solid medium with 2 mg/L PAA was effective for embryo formation from shed microspore of herbaceous peony.

작약의 약 및 소포자 배양 효율을 향상시키기 위하여 배지 내에 첨가되는 PAA의 농도별 배형성 정도와 배의 형태적 변이 등에 대한 실험을 수행하여 얻어진 결과를 요약하면 다음 과 같다. 작약의 약배양에서 배지 내에 첨가되는 PAA의 농도에 따라 소포자 유래의 배형성률은 다르게 나타났는데 2 mg/L의 PAA가 첨가된 배지에서 배형성률이 가장 높게 나타났으며, PAA의 농도가 증가됨에 따라 배형성를은 낮아진 반면 캘러스 형성률은 증가하는 경향을 나타내었다. 소포자에서 유래된 배의 형태는 PAA의 농도에 따라 큰 변이를 나타내었는데 2개의 자엽을 가진 정상배의 출현빈도는 2 mg/L의 PAA가 첨가된 배지에서 가장 높게 나타났으며 PAA의 농도가 그 이상으로 증가하면 오히려 비정상배의 출현빈도가 높아지는 경향이었다. 작약의 소포자 배양에서도 2 mg/L의 PAA 첨가 배지에서 10일간 전배양된 약을 PAA (2 mg/L)를 함유한 MS액체 배지에 배양했을 때 누출된 소포자 (shed microspore)의 수도 많았고 분열률도 높았으며, 이들 소포자로부터 형성된 배의 수도 가장 많았다.

Keywords

References

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Cited by

  1. Cryopreservation of somatic embryos of the herbaceous peony (Paeonia lactiflora Pall.) by air drying vol.53, pp.1, 2006, https://doi.org/10.1016/j.cryobiol.2006.03.012