• Journal of Plant Biology
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• 제37권3호
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• pp.277-284
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• 1994

I investigated levels of genetic diversity, population genetic structure, and gene flow in Hostacapitata, a herbaceous perennial native to South Korea and southwestern Japan. Starch gel electrophoresis was conducted on leaves collected from 310 plants in 19 Korean populations. Twenty-two of 25 putative loci examined were polymorphic in at least one populatin and the mean number of alleles per locus was 1.65. In addition, mean expected heterozygosity within populations (Hep=0.153) was higher than average values for species with similar life history traits. Significant differences in allele frequency were detected between populations at all loci (P<0.01), and slightly over 30% of the genetic variation was found among populatins (GST=0.308). Indirect estimates of the number of migrants per generation (Nm) (0.506, calculated from GST; 0.852, calculated from the mean frequency of ten private alleles) indicate that gene flow is restricted among the isolated Korean populations of H. capitata. Factors contributing to the high levels of genetic differentiation among populations of H. capitata include small and discrete populations, human disturbance, and low frequencies of pollinator foraging behavior.

• Journal of Plant Biology
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• 제27권3호
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• pp.107-127
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• 1984

An anthecological study of Tilia in Korea was undertaken for six native and one introduced species. Flowers are protoandrous with anther and stigma opening during the day-time in section(sect) Anastraea and the night-time in sect Astrophilyra. Nectar production was coincided with anther and stigma opening. It is revealed that the primary role of floral bracts was attracting pollinators especially in sect Astrophilyra. The peak of stamen and stigma function, and the production of nectar and odor were closely related with pollinator attraction. Forthy-three species of insects in 30 families were identified for the pollination studies; bees were the most commonly observed visitors in sect Anastraea, while moths were the primary visitors in sect Astrophilyra. Pollination study indicate that it is section specific. But within a section, pollination is not species specific thus interspecific hybridization occurs.

• 식품과학과 산업
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• 제55권2호
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• pp.166-175
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• 2022

Current food system has developed with the agricultural innovation to feed the increasing population of the world, but with high costs such as environmental contamination and inequality with low sustainability. Human has developed long history of mutualistic interaction with honey bee. This manuscript describes the multi-functionality of honey bee for food production. Firstly honey bee produces honey, bee pollen, royal jelly and propolis which are rich in functionality. Second honey bee serves as the main pollinator for crop production which is worth for 28% of total crop production values in Korea. Lastly honey bee can be an alternative meat produciton system with lower energy, carbon costs but higher nutritional security. This manuscript described those parts and discussed the multi-functionality of honey bees for eco-friendly food security pursuing lowered environmental cost and carbon-zero strategies in the climate change era.

• The Plant Pathology Journal
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• 제37권3호
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• pp.299-306
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• 2021

Pollination is an essential process for plants to carry on their generation. Pollination is carried out in various ways depending on the type of plant species. Among them, pollination by insect pollinator accounts for the most common. However, these pollinators have be decreasing in population density due to environmental factors. Therefore, use of artificial pollination is increasing. However, there is a lack of information on microorganisms present in the artificial pollens. We showed the composition of bacteria structure present in the artificial pollens of apple, kiwifruit, peach and pear, and contamination of high-risk pathogens was investigated. Acidovorax spp., Pantoea spp., Erwinia spp., Pseudomonas spp., and Xanthomonas spp., which are classified as potential high-risk pathogens, have been identified in imported pollens. This study presented the pollen-associated bacterial community structure, and the results are expected to be foundation for strengthening biosecurity in orchard industry.

• 농약과학회지
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• 제21권1호
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• pp.90-96
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• 2017

국내에서 생산하는 과채류에서 발생되는 잿빛곰팡이병은 명확한 생물학적 방제 방법으로 제시된 바가 없는 실정이다. 국내에서 사용 및 개발되고 있는 화학적 방제 약제의 경우 약제저항성 병원균의 출현이 지속되고 있는 상황이다. 또한 임의 기생성으로 인해 기주의 여부에 상관 없이 생존이 가능하므로 경종적 방제 또한 어려운 실정이다. 이에 본 연구에서는 토마토 꽃에 정착력이 우수한 길항미생물을 선발하기 위해 시설재배지의 토마토 화기와 벌집 시료로 미생물을 분리하여 방제균을 선발하였다. 총 6개월의 토마토 재배기간 중 꽃에서 1,004개 균주, 벌집에서 925균주를 분리하여, 잿빛곰팡이 병원균을 억제력이 우수한 6균주를 선발하였다. 선발된 6균주는 잿빛곰팡이 병원균에 대한 항균활성이 우수할 뿐 아니라, cellulase와 protease의 활성 또한 우수한 것으로 검증되었다. 선발된 균주는 Paenibacillus polymyxa 로 동정 되었으며, 토마토의 잿빛곰팡이 발병률을 약 75% 감소시키는 효과를 나타내었다.

• 한국응용곤충학회지
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• 제56권4호
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• pp.365-370
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• 2017

생대추가 신소득 작목으로 부각되면서 재배지가 확대되고 있으나 우리나라 장마기와 최근 이상기후로 인해 대추 수분 수정 및 착과에 문제가 발생하고 있는 실정이다. 이에 생대추 재배를 위해 도입된 비가림하우스에서 서양종 꿀벌과 서양뒤영벌을 이용하여 화분매개곤충의 활동 특성과 착과 효율에 어떠한 영향을 미치는지 구명하고자 본 시험을 수행하였다. 대추 복조 품종을 대상으로 비가림하우스에 망실을 씌워 서양종 꿀벌과 서양뒤영벌을 2016년 6월 1일부터 7월 25일까지 약 55일정도 방사하였다. 서양종 꿀벌은 주로 오후에 활동이 많았으나 서양뒤영벌의 활동은 시간에 관계없이 다소 균일하였다. 대추 신초 가지의 착과율을 조사한 결과 방화곤충을 차단한 무처리 5.5% 대비 서양종 꿀벌은 10.2%, 서양뒤영벌은 8.9%로 대추 비가림하우스내 화분매개곤충 활용시 착과량 증진으로 농가 소득증대에 기여할 것으로 생각된다.

• 한국잠사곤충학회지
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• 제50권2호
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• pp.41-47
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• 2012

여름철의 시설수박에서 인공수분을 대체할 수 있는 화분매개곤충을 선발하기 위하여 화분매개곤충을 방사하여 인공수분과 비교하였다. 여름철 시설수박 하우스의 고온과 낮은 습도 등으로 인하여 화분매개환경이 매우 열악하여 호박벌과 서양뒤영벌은 외부로 탈출하는 일벌수가 많고 화분매개활동수가 적어져서 경제적인 수분과 착과에 도달하지 못하였다. 꿀벌은 외부 탈출일벌이 야간 발생하였으나, 많은 일벌이 수박꽃에서 충분한 화분매개활동을 하여 인공수분과 같은 경제적인 수분에 도달하였고, 생산물도 인공수분구와 같이 정상적으로 생산되었다. 따라서 여름철 시설수박하우스에서 수박꽃의 수분은 꿀벌은 화분매개곤충으로 사용이 가능한 것으로 조사되었고, 뒤영벌은 사용이 불가능한 것으로 조사되었다.

• 한국환경생태학회지
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• 제33권4호
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• pp.408-421
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• 2019

수입되는 서양뒤영벌과 그에 대한 화분매개 대체안들을 비교 평가하기 위해 증분이익을 추정하여 분석하였다. 분석결과, 판매수익에서 공통 생산원가를 차감한 증분수익은 인공수분을 사용할 때보다 화분매개곤충을 사용할 때 더 많았으며, 증분원가는 수입산 서양뒤영벌이나 꿀벌을 사용할 때보다 국내산 서양뒤영벌이나 인공수분을 사용할 때 더 적었다. 각 대안별 증분이익을 살펴보면, 수입산 서양뒤영벌 46,801 백만원, 국내산 서양뒤영벌 47,170 백만원, 꿀벌 46,975 백만원, 인공수분 29,839 백만원이었다. 증분이익은 각 대안을 선택했을 경우 얻을 수 있는 회계적 이윤을 의미한다. 다만, 회계적 이윤 전부를 화분매개 대안이 기여한 것으로 볼 수 없으며, 귀속지대나 정상이윤과 같은 잠재적 비용이 포함되어 있다. 잠재적 비용에 해당하는 기회원가를 고려할 때, 수입산 서양뒤영벌을 사용하는 대안은 경제적 손실이 발생하는 것으로 나타났다. 이는 과수 작물 생산농가가 수입산 서양뒤영벌을 사용하는 대신 다른 대체안을 선택할 경우 추가적인 경제적 이윤을 창출할 수 있음을 의미한다.

• Journal of Plant Biology
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• 제37권2호
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• pp.141-149
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• 1994

Levels of genetic diversity, population genetic structure, and gene flow in Hosta yingeri, a herbaceous perennial endemic to Taehuksan, Sohuksan, and Hong Islands, were investigated. Starch gel electrophoresis was conducted on leaves for 101 plants collected from three populations. Although the distribution of thespecies is restricted in the islands, it maintains high levels of genetic variatin; 64% of polymorphic loci in at least one population (Ps), the mean number of alleles per locus (Ap) of 1.92, and the mean effective number of alleles per locus (Aep) of 1.52. Overall, mean genetic diversity (Hep=0.250) was substantially higher than mean estimate for species with very similarlife history traits (0.102). Large populaton size, the persistence of multiple generations within populations, high fecundity, predominantly outcrossing breeding system, large size of pollinator visitation areas may be explanatory factors contributing the higher level of genetic diversity maintained within populations. Analysis of fixation indices showed an overall slight excess of heterozygotes (mean FIS=-0.066) relative to Hardy-Weinberg expectations, which may in part be due to the near self-incompatible breeding system in the species. Significant differences in allele frequencies among populaitns were found for 14 out of 16 polymorphic loci (P<0.05). Slightly more than 80% of the total variation in the species was common to all populations (GST=0.198). As expected, indirect estimate of the number of migrants per generation (Nm=0.45, calculated from mean GST) and nine private alleles found in the three populations indicate that gene movement among three isolated island populations was low.

• Journal of Ecology and Environment
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• 제44권1호
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• pp.26-32
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• 2020

Background: Pollen is an important source of protein and lipids for many animals including honey bees. In order to understand the foraging behaviour of honey bee colonies and preference among the available floral resources, pollen collections from three experimental healthy colonies of honey bees were analysed in the month of June. Results: The amount of pollen collections were related to the colony's need which was indicated by the number of larval and adult bees present in the hive. Interesting was the sequence of pollen collection from different floral sources. All honey bee colonies collected pollens from Trifolium repens first, then Erigeron annus and the third choice was Coreopsis drummondii and Oenothera biennis flowers. Total protein content of Trifolium pollen was the highest (20.0 g/100 g DM), and the others were in the range of 8.9-11.4 g/100 g DM. Conclusion: The results indicated that the first criteria for honey bee foraging preference of pollens would be the nutritional contents of protein and the resource availability of the lesser nutritious floral sources. This information can help pollinator protection programmes of habitat manipulation using flowering plants for nectar and pollen sources.