Effect of Light Quality during $GA_3$ Imbibition and Germination Temperature on Pepper Seed Germinability

파종 전 $GA_3$와 광질 처리, 발아온도에 따른 고추종자의 발아율

  • 강진호 (경상대학교 식물자원환경 학부) ;
  • 심영도 (경상대학교 식물자원환경 학부) ;
  • 강신윤 (경상대학교 식물자원환경 학부) ;
  • 조영욱 (경상대학교 식물자원환경 학부) ;
  • 박아정 (경상대학교 식물자원환경 학부)
  • Published : 1999.06.01

Abstract

Higher and uniform germination should be necessary because many commercial pepper (Capsicum annum L.) seedlings were nowadays sold to farmer. The experiment was carried out to determine the effect of its cultivars (Daemyung; Wanggochu), GA$_3$ (concentration; period), light quality (red; far-red; blue; dark) during GA$_3$imbibition, and germination temperature (GT: 25 or 15$^{\circ}C$ constant; 25/15$^{\circ}C$ alternating) on the rate of germination done under incandescent lamps until 9 days after sowing. Final seed germination was not different between GA$_3$0 to 1.0 mM concentrations but the elapsed days to 50% germination $(T_{50})$ were more reduced by GA$_3$ treatment than water imbibition. Under $25^{\circ}C$ constant germination temperature, earlier germination was enhanced by GA$_3$treatment showing the lowest rate at darkness, although the final germination rates of water imbibition and GA$_3$ treatments were same. The final germination rates of alternating and 25 $^{\circ}C$ constant GT in cv. Daemyng was also equal, while the germination rates of $25^{\circ}C$ and 15$^{\circ}C$ constant GT were the highest and the lowest regardless of cultivars. There was no difference between light quality treatments impelled during GA$_3$ imbibition when light treated seeds were germinated at alternating and $25^{\circ}C$ constant GT. At 15$^{\circ}C$ constant GT, however, red light or dark treatment during GA$_3$imbibition increased the germination rate since 5 days after sowing.

현재 국내에서 시판되고 있는 어린 묘 중에서 가장 판매주수가 많은 것이 고추 묘로서 부가가치를 더욱 높이기 위하여는 발아와 균일성을 향상시켜야 할 것이다. 본 연구의 목적은 발아와 균일성 향상에 효과가 있는 GA$_3$, 처리중의 광질처리와 발아온도에 따른 발아율의 변화를 추적하여 고추 공정묘 생산에 필요한 정보를 제공하고자 실시 하였다 대명고추 [(주)중앙종묘]와 왕고추 [(주)동부한농종묘]를 공시품종으로 파종 전처리로는 GA$_3$처리농도 (0, 0.01, 0.1, 1.0 mM), 처리기간 (0, 1, 2, 3일), 광질 (적색, 초적색, 청색, 암)과 발아과정에서는 온도 (15, $25^{\circ}C$ 항온, 25/15$^{\circ}C$ 변온)를 달리하여 치상 후 9일까지 백열등으로 조사하면서 발아시험을 수행하였다. 시험결과를 요약하면 다음과 같다. 1. 최종발아율은 GA$_3$ 처리농도간에는 전체적으로 차이가 없는 경향이었으나, T$_{50}$은 증류수에 침지하는 것보다 GA$_3$를 처리할 경우 단축되었다. 2. 발아온도 $25^{\circ}C$ 항온에서는 최종발아율은 GA$_3$ 처리유무간에 차이가 없었으며 초기발아율은 GA$_3$ 처리로 증가되었던 반면, 치상 후 5~7일에서는 암상태에서 가장 낮았다. 3. 공시품종 모두 발아율은 $25^{\circ}C$ 항온에서 가장 높고 15$^{\circ}C$ 항온에서는 현저히 억제되었던 반면 왕고추는 25/15$^{\circ}C$ 변온에서의 최종발아율은 $25^{\circ}C$ 항온과 거의 동일한 것으로 나타났다. 4. 광질은 발아온도 $25^{\circ}C$ 항온, 25/15$^{\circ}C$ 변온에서 처리간 차이가 없었으나, 15$^{\circ}C$ 항온에서는 GA$_3$침지중 가하여지는 적색광 또는 암처리에서 치상 후 5일 이후부터 발아율을 증가시켰다.

Keywords

References

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