생명과학회지 (Journal of Life Science)

  • 제7권4호
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  • Pages.308-308
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  • 1997
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
권호 표지

강낭콩 잎의 노화에 있어서 식물 호르몬의 역할

Role of Plant Hormones in the Senescing Detached Leaves of Phaseolus vulgaris

  • 발행 : 1997.12.01

⟨ 이전 논문 다음 논문 ⟩

초록

NAA, GA$_{3}$ 및 BA등의 식물 호르몬이 노화중인 강남콩 잎의 엽록소-단백질 복합체의 분해에 미치는 효과를 조사하였다. 노화의 대표적인 특징인 엽록소의 소실은 엽록소-단백질 복합체의 분해를 수반하였다. 암유도 노화과정동안, PSI 복합체는 급격히 감소한 반면 RC-Core3은 오히려 조화 중기까지 조금씩 증가하다가 이후 서서히 분해되었다. 그리고 LHCII는 노화 과정 후기부터 점진적으로 분해되었다. NAA와 GA$_{3}$는 노화동안 엽록소-단백질 복합체의 분해를 억제하는데 거의 영향을 미치지 못 하였다. 그러나 BA는 노화 과정동안 엽록소-단백질 복합체, 특히 RC-Core1, RC-Core2와 SC-1의 분해를 억제하는데 매우 효과적이었다. 한편 식물 호르몬과 광선의 동시 처리에 있어서, BA와 광선의 동시 처리는 노화 과정동안 엽록소-단백질 복합체, 특히 PSI, LHCII, RC-Core2, RC-Core3과 SC-1의 분해를 억제하는데 가장 효과적이었다. 이와 같은 결과에서 노화 과정동안 엽록소-단백질 복합체는 BA 혹은 광선의 단독 처리보다 BA와 광선의 동시 처리에 의하여 보다 높은 안정성을 가질 것으로 사료된다.

Role of plant hormones on the leaf senescence of Phaseolus vulgaris were investigated by measuring the disassembly of chlorophyll-protein complexes in detached leaves treated with NAA, GA$_{3}$ , or BA. The loss of chlorophyll that was characteristic of leaf senescence induced disassembly of chlorophyll-protein complexed. During dark-induced senescence, PSI complex was rapidly degraded after the early stage, whereas RC-Core3 was slightly increased until the middle stage and slowly decreased thereafter. And gradual degradation of trimeric LCHII progressed after the late stage of senescence. Exogenous application of NAA and GA$_{3}$ had little or no effect in protecting disassembly of chlorophyll-protein complexes during leaf senescence compared to control. However exogenous BA application strongly leaves. In the simultaneous treatment of plant hormones and light, BA application under illumination of light was most effective in the stability of chlorophyll-protein complexes, particularly PSI, LHCII, RC-Core2, RC-Core3 and SC-1. these results suggest, therefore, that simultaneous application of BA and light induced synergistic effect on the stability off chlorophyll-protein complexes during leaf senescence.

키워드

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