Abstract
In order to find out the feasibility of producing grafted red pepper (Capsicum annuum L.) seedlings with root-removed rootstocks, rooting response and subsequent seedling growth was also evaluated. Pinching the top of pepper seedlings for cutting significantly reduced the rooting of cuttings in 10 commercial hot pepper cultivars. Normal rooting was obtained from all commercial cultivars even though the rooting response varied considerably among cultivars. Poor rooting was observed in 'Gukbo' and 'Chungyang'. Rootone treatment significantly promoted rooting in all tested cultivars and the decrease of rooting response caused by pinching could be fully recovered by rootone treatment. Among the ten commercial rootstocks developed for hot pepper grafting, 'Tantan' showed the best rooting response followed by 'Konesian Hot' and 'Wonkwang 1'. Most of these rootstocks, however, showed higher rooting response as compared to the popular commercial cultivars, 'Manit', 'Chungyang', and 'Nokkwang'. Pasting of IBA at cut surface promoted the rooting of pepper cuttings, but the effect was not quite pronounced as compared to rootone treatment.
적심 및 rootone 처리가 고추 10품종의 발근력에 미치는 영향을 조사한 결과, 모두 정상적으로 발근되었으나 품종간에 큰 차이를 보였다. 즉 'Gukbo'와 'Chungyang' 등은 발근력이 낮은 반면, 대목 이용 가능성이 높은 'Geumsang' 등은 매우 높았다. 발근촉진제 rootone 처리는 모든 품종의 발근을 현저히 증가시켜 높은 실용성을 보여주었다. 또한 적심에 따른 발근 지연 현상은 rootone 처리로 거의 완벽하게 보완될 수 있었다. 선발된 대목 10품종과 접수 3품종을 적심과 IBA 단용 또는 병행처리 후 발근력을 검토한 결과, 대목 중에서는 'Tantan'이 가장 높았고, 'Konesian Hot'과 'Wonkwang 1호'도 높았다. 또한 공시된 10개 대목은 대면적에 일반재배 되는 품종인 'Manita', 'Chungyang', 'Nokkwang'보다 발근력이 높았다. IBA 처리는 발근력을 다소 향상시켰으나 rootone 처리에 비해 효과가 뚜렷하지 않았다.
