• Journal of Species Research
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• 제1권2호
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• pp.232-239
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• 2012

Taxonomy of umbelliferous taxa Heracleum moellendorffii complex has been unclear in their species delimitation in the far-eastern Asian regions. In both Korea and China Heracleum moellendorffii was adopted for their description while H. sphondylium was chosen to describe Japanese Heracleum. From Genbank accessions, taxa collected from Kamtchatka and Promorskiy, Russia were defined as H. maximum, endemic taxon to North America. In this study, we reviewed the taxonomy of Heracleum moellendorffii complex in Korea and neighboring countries on the basis of molecular phylogenies derived from sequences of nuclear ribosomal DNA internal transcribed spacer (ITS) regions. From three Korean accessions of Heracleum investigated in this study, two types of ITS sequences were obtained; two accessions were related to Chinese H. moellendorffii var. moellendorffii and North American H. maximum without forming a clade while the other one was identical to accession from H. maximum from Primorskiy, Russia. In the other hand, Japanese H. moellendorffii (=H. sphondylium ssp. sphondylium var. nipponicum in the flora of Japan) was closely related to H. maximum accessions from Korea and Russia, not nested within the clade comprising several subspecies of H. sphondylium. In order to delimit species boundaries among putatively closely related Heracleum species in fareastern Asian countries, more samples and much more rapidly evolved DNA regions must be investigated with interpretation of morphological and anatomical features.

• 현장농수산연구지
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• 제19권1호
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• pp.91-97
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• 2017

This study was carried out to establish a proper cultivation site and to diagnose the drought tolerance of Heracleum moellendorffii leaves by using pressure-volume curves. As a result of analysing data measured, the leaf of H. moellendorffii showed the osmotic pressure at full turgor (Ψ_o^sat) was -1.0MPa, and that at incipient plasmolysis (Ψ_o^tlp) -1.2MPa. Then, the value of maximum bulk modulus of elasticity Emax was 28MPa, showing the sightly strong drought tolerance of H. moellendorffii. Furthermore, the values of relative water contents RWC^tlp and RWC^* were above 88%, showing that the function of osmoregulation is somewhat better. Thus, responses to water relations such as Ψ_o^sat, Ψ_o^tlp, E_max, RWC^tlp and RWC^* of H. moellendorffii showed it's slightly high drought tolerance property.

• 현장농수산연구지
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• 제18권1호
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• pp.63-70
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• 2016

산채의 일종으로 현재 임업농가에서 활발히 재배되고 있는 눈개승마와 어수리의 수증기압차(vapor pressure deficit; VPD)에 따른 순광합성 속도 등 생리반응을 조사하여 효율적인 생산과 재배관리를 위한 기초자료를 제공하고자 하였다. 건조한 High-VPD 환경에서 눈개승마가 어수리에 비해 증산량을 줄이면서 수분이용효율을 높이는 기작을 통해 높은 순광합성 속도를 유지하는 것을 알 수 있었으며, 어수리에 비해 눈개승마는 엽의 수분 퍼텐셜의 감소가 비교적 크지 않고, 엽의 수분 불포화도 역시 큰 변화가 없는 것으로 보아 건조한 대기 환경에 따른 수분스트레스의 적응력이 비교적 양호한 종임을 알 수 있었다. 어수리는 VPD가 3.0kPa 이상으로 높게 나타나는 건조한 대기상태가 되면 순광합성 속도의 감소가 뚜렷히 나타나고 수분 퍼텐셜의 급속한 저하 및 엽의 수분 불포화도가 10배 이상 높게 나타나 상대적으로 건조한 대기 환경에서 생육하기 어려운 종임을 알 수 있었다. 따라서 재배지의 환경조건이 VPD 3.0kPa 이상의 건조한 환경이 자주 형성되는 곳은 어수리의 생육에 불리할 수 있으며, 눈개승마의 경우 어수리 보다 다소 건조한 대기환경에 더 높은 적응력을 지닌 것을 알 수 있었다.