Effects of Plant Growth Regulators Sprayed at Unfolded Leaf Stage on Fruit Quality in 'Campbell Early' Grape

This study was conducted to increase grape quality by treating plant growth regulator (PGR) in 'Campbell Early' grape. Foliar application of gibberellic acid ($GA_3$) at $5mg{\cdot}L^{-1}$ on flower cluster of 'Campbell Early' grape at 3-5 unfolded leaf stage effectively increased columella length, berry weight, soluble solid contents and promoted skin color development. Foliar application of $20mg{\cdot}L^{-1}$ abscisic acid (ABA) mixed with $5mg{\cdot}L^{-1}$ of $GA_3$ on flower cluster of 'Campbell Early' grape at 3-4 unfolded leaf stage effectively increased skin anthocyanin contents without any detrimental effects on berry enlargement and columella growth. Foliar application of $2.5mg{\cdot}L^{-1}$ thidiazuron mixed with $5mg{\cdot}L^{-1}$ of $GA_3$ on flower cluster of 'Campbell Early' grape at 3-4 unfolded leaf stage effectively increased fruit quality indices such as higher soluble solid contents and less titratable acidity.

포도 '캠벨얼리' 품종의 전엽기 생장조절제 처리가 품질에 미치는 영향

본 연구는 식물생장조절물질을 활용하여 '캠벨얼리' 포도의 품질향상 증진 방안을 마련하기 위하여 실시하였다. 전엽 3~5엽기에 화방에 대한 지베렐린($GA_3$) $5mg{\cdot}L^{-1}$ 엽면처리는 '캠벨얼리' 포도의 과경, 과방중, 가용성당함량, 과피의 착색을 증진시켰다. 전엽 3~4엽기의 화방에 대한 $GA_3$ $5mg{\cdot}L^{-1}$과 ABA $20\;mg{\cdot}L^{-1}$ 혼용처리는 과립 비대와 과축 신장을 저해하지 않았으며 포도 과피의 안토시아닌 축적에 효과적이었다. '캠벨얼리' 포도의 전엽 3~4엽기에 화방에 대한 thidiazuron $2.5mg{\cdot}L^{-1}$과 $GA_3$ $5mg{\cdot}L^{-1}$ 혼용처리는 가용성고형물 함량 증진과 산함량 감소를 촉진하여 과실 품질이 증대되었다.