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참다래 품종에 따른 과실의 생육 특성과 자당 대사 효소 활성의 비교
강형호(Hyeong Ho Kang),오은의(Eun Ui Oh),이경욱(Kyeong Uk Lee),곽용범(Yong-Bum Kwack),이목희(Mock Hee Lee),송관정(Kwan Jeong Song) 한국원예학회 2021 원예과학기술지 Vol.39 No.2
본 연구는 제주지역에서 재배되고 있는 참다래 품종의 과실 생육과 자당 대사에 관여하는 효소 활성과의 관계를 살펴보고자 수행되었다. 골드키위 계통의 ‘한라골드’, ‘스위트골드’ 및 ‘골드원’과 그린키위 계통의 ‘감록’ 품종을 이용하여 수행하였다. 과실 비대는 생육기 초반에 급격히 증가하고, 건물율은 수확기까지 지속적으로 증가하였다. 전분의 함량은 만개 후 140일까지 계속 증가하여 170일까지 높게 유지되었으며, 이후 급격히 감소하였다. 가용성 당은 만개 후 120일까지 낮은 수준을 보였으나, 이후 수확기까지 급격하게 증가하였다. 자당 분해의 sucrose synthase(SS)와 acid invertase의 활성은 품종에 따라 약간의 차이는 있으나 만개 후 120–140일까지 점진적으로 감소하였으며, neutral invertase의 활성은 과실 발육 기간 동안 거의 일정하게 낮은 수준을 유지하였다. Sucrose phosphate synthase와 SS의 자당 합성의 활성은 각각 만개 후 140일 및 120일까지 낮은 수준에 머물렀으나 이후 점차 증가하였다. 본 연구 결과 만개 후 100–120일이 자당 대사 효소 활성의 변화와 더불어 과중 및 가용성 당 함량의 증가 양상이 변화하는 전환점이 됨을 확인할 수 있었다. The study was conducted to examine the relationship between fruit development and sucrose metabolizing enzyme activities in the fruit of some kiwifruit cultivars grown in Jeju, Korea. The fruit characteristics and sucrose metabolizing enzyme activities were evaluated during fruit development in yellow-fleshed cv. ‘Halla Gold’, ‘Sweet Gold’ and ‘Goldone’ and green-fleshed cv. ‘Garmrok’. Fruits were enlarged rapidly at the early stage of fruit development and dry matter showed a gradual increase by harvesting time. Starch content continued to increase by about 140 DAA, was maintained by 170 DAA, and thereafter decreased drastically. The level of soluble sugar was low by 120 DAA and then increased rapidly by harvesting time. The sucrose degradation activities of sucrose synthase (SS) and acid invertase decreased gradually by 120-140 DAA with a small difference depending on cultivars, but those of neutral invertase remained constantly low during fruit development. The sucrose synthesizing activities of sucrose phosphate synthase and SS maintained low levels of 140 and 100 DAA, respectively and then increased gradually. The results indicate that 100-120 DAA is a turning point in a changing pattern of fruit weight and soluble sugar content that combined with a change in sucrose metabolizing enzyme activities.
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골드키위에서 꽃가루 품종과 희석 비율이 종자 형성과 과실 품질에 미치는 영향
정승용 ( Seung Yong Jeong ),이경욱 ( Kyung Uk Yi ),오은의 ( Eun Ui Oh ),현시우 ( Si Woo Hyun ),강형호 ( Hyeong Ho Kang ),송관정 ( Kwan Jeong Song ) 한국국제농업개발학회 2018 韓國國際農業開發學會誌 Vol.30 No.2
The study was carried out to evaluate the effect of pollen donor genotype and pollen dilution ratio on fruit quality and seed formation in three yellow-fleshed kiwifruits including ‘Halla Gold’, ‘Sweet Gold’, and 'Enza Gold'. Analysis of pollen tube growth indicated that pollen tubes penetrated into ovules through style 2 or 3 days after artificial pollination, but there was a little bit of difference in the number of pollen tubes penetrating into ovules depending on pollen donor genotypes and dilution ratio. Pollen tube growth of ‘Bohwa’ was better than ‘Chieftain’ in ‘Halla Gold’ and ‘Sweet Gold’, whereas opposite tendency was observed in ‘Enza Gold’. The number of pollen tubes penetrating into ovules was the lowest in 20X pollen dilution. Pollination with ‘Bohwa’ increased the fresh weight and dry matter of fruits than that with ‘Chieftain’ in all three cultivars. Seed number showed a similar tendency to fruit weight and dry matter in ‘Halla Gold’ and ‘Sweet Gold’, but opposite tendency was shown in 'Enza Gold'. The fresh weight and dry matter of fruits was higher in 1-10X compared to that of fruits from 20X dilution and was little affected by dilution ratio. Seed number and 100-seeds weight showed similar tendency to fresh weight and dry matter.
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