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2019 Vol.28, Issue 2 Preview Page
Growth and Flower Bud Induction in Strawberry ‘Sulhyang’ Runner Plant as Affected by Exogenous Application of Benzyladenine, Gibberellic Acid, and Salicylic Acid

벤질아데닌, 지베렐린산, 살리실산이 ‘설향’ 딸기묘의 생장과 화아 유도에 미치는 영향

Luc The Thi1
,
Quan Hoang Nguyen1
,
Yoo Gyeong Park2
,
Byoung Ryong Jeong123*
티 데루1
,
응 우엔황콴1
,
박 유경2
,
정 병룡123*
1Department of Horticulture, Division of Applied Life Science (BK21 Plus Program), Graduate School of Gyeongsang National University, Jinju 52828, Korea
2Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea
3Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea
1경상대학교 대학원 응용생명과학부(BK21 Plus Program)
2경상대학교 농업생명과학연구원
3경상대학교 생명과학연구원
*Corresponding author: brjeong@gmail.com
30 April 2019. pp. 178-184
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Abstract

Strawberry (Fragaria × ananassa) is one of the most important and popular fruit crops in the world, and ‘Sulhyang’ is one of the principal cultivars cultivated in the Republic of Korea for the domestic market. The growth and flower induction in strawberry is the process which influences directly on fruit bearing and yield of this crop. In this study, effect of benzyladenine (BA), gibberellic acid (GA3), and salicylic acid (SA) on growth and flower bud induction in strawberry ‘Sulhyang’ was investigated. The 3-week-old runner plants, grown in 21-cell propagation trays, were potted and cultivated in growth chambers with 25oC/15oC (day/night) temperatures, 70% relative humidity (RH), and light intensity of 300 μmol·m-2·s-1 photosynthetic photon flux density (PPFD) provided by white light emitting diodes (LEDs). The runner plants were treated with one of three concentrations, 0 (control), 100, and 200 mg·L-1 of BA, GA3, or SA solution. The chemicals were sprayed two times on leaves of runner plants at an interval of two weeks. After 9 weeks the results showed that the application of all chemicals caused reduction of root length and chlorophyll (SPAD) content as compared to the control. The lowest chlorophyll (SPAD) content was recorded in plants treated with GA3. However, the treatment of 200 mg·L-1 GA3 promoted leaf area, leaf fresh weight, and plant fresh weight. The greatest flower induction (85%) and number of inflorescences (4.3 inflorescences per plant) were observed in the treatment of 200 mg·L-1 SA, followed by 100 mg·L-1 SA. Overall, results suggest that foliar application of GA3 solution could accelerate plant growth, while foliar application of SA solution could induce hastened flowering. Further studies may be needed to find out the relationship between GA3 and SA solutions treated in a combination, and the molecular mechanism involved in those responses observed.

Keywords
floral differentiation
foliar spray
Fragaria × ananassa
plant growth regulator

딸기는 세계적으로 중요하고 인기있는 과채류이며 ‘설향’은 국내 시장에서 재배되고 있는 주요 품종 중 하나이다. 딸기의 생장과 화아 유도는 이 작물의 과실에 수량에 직접적으로 영향을 미치는 과정이다. 본 연 구에서는 벤질아데닌(BA), 지베렐린 산(GA3), 살리실 산(SA)이 ‘설향’ 딸기의 생장과 화아 유도에 미치는 영향 을 조사하였다. 21구 트레이에서 번식된 지 3주가 경과한 런너묘를 온도는 25oC/15oC(주간/야간), 상대습도는 70%, 광원은 백색 LED, 광도는 300 μmol·m-2·s-1 PPFD로 유지되는 생장 챔버에서 재배하였다. BA, GA3 및 SA를 각 0(대조구), 100, 200 mg·L-1로 런너묘에 처리하였다. 이러한 생장조절제를 런너묘의 잎에 2주 간격으 로 2회 엽면살포하였다. 9주 후의 생육을 비교한 결과, 생장조절제를 엽면살포한 모든 처리에서 대조구에 비해 근장과 엽록소함량(SPAD)이 감소하는 경향을 보였다. GA3 처리에서 엽록소함량(SPAD)이 가장 낮았다. 하지만 GA3 200 mg·L-1 처리에서 엽면적, 잎 생체중, 식물 생체중이 증가하였다. 화아유도율과 화수는 SA 200 mg·L-1 처리에서 각 85%와 식물체당 4.3개로 가장 높았고 그 다음으로 SA 200 mg·L-1 처리에서 높았다. 전체적으로 GA3 처리에서 식물 생장을 향상시켰고, SA 처리에서는 개화를 촉진하였다. 더 나아가 GA3와 SA를 혼합한 처 리를 추가한 연구를 수행하여 생장조절제간의 관계를 구명하고 그 결과에서의 분자 메커니즘과 관련된 반응을 조사하는 것이 필요하다고 판단된다.

키워드
화아분화
엽면살포
딸기
식물생장조절제
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Protected Horticulture and Plant Factory
  • Journal Title(Ko) :시설원예ㆍ식물공장
  • Volume : 28
  • No :2
  • Pages :178-184
  • Received Date : 2019-03-19
  • Revised Date : 2019-04-22
  • Accepted Date : 2019-04-26
  • DOI :https://doi.org/10.12791/KSBEC.2019.28.2.178
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