생명과학회지 (Journal of Life Science)

  • 제19권8호
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  • Pages.1016-1022
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  • 2009
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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인삼 융단조직의 프로그램 세포사에 관한 미세구조적 연구

Ultrastructural Study of Programmed Cell Death of Tapetum In Panax ginseng

  • 발행 : 2009.08.30
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초록

융단조직은 약실 내에서 발달하는 소포자에 영양분을 공급하고 퇴화되는 조직으로써, 소포자 4분자 시기에 최대로 발달하고 화분벽에 포분질에 축적된 후 프로그램 세포사가 일어남으로써 세포가 죽게 되고 융단조직 전체가 퇴화된다. 액포가 융합되므로써 프로그램 세포사가 시작되고 세포질응축, 핵질 분절 등이 뒤따라 일어난다. 지질 덩어리는 비교적 늦은 시기에 퇴화되며 orbicular body는 가장 늦게까지 남아 있게 된다. 융단세포의 프로그램세포사 전 과정 중에서 세포벽은 액포에서 기원하는 가수분해 효소에 비교적 안정적이므로 가장 늦게 퇴화되는 것으로 확인되었다.

Tapetum is the tissue in which nutrients are supplied to the developing microspore in angiosperm anther. At tetrad stage of microspore, the tapetal cells show maximum development, but they began to be degenerated by apoptotic programmed cell death (PCD) after sporopollenin accumulation in the pollen wall. The initial step of PCD was observed as vacuolar fusion. After that, cytoplasmic condensation and nuclear fragmentation followed. Lipid droplets are degenerated at a relatively late stage of PCD, and orbicular bodies are the last remains in tapetal cells. The cell wall was relatively resistant against vacuolar enzymes in tapetal cells; it was considered the last structure remaining during programmed cell death of tapetum in ginseng anther.

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피인용 문헌

  1. The phylogenetic potential of orbicules in angiosperms vol.48, pp.1, 2018, https://doi.org/10.11110/kjpt.2018.48.1.9