• Natural Product Sciences
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• 제5권1호
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• pp.39-47
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• 1999

The flowers of Alcea rosea L., Malvaceae, sold in the Indian market under the trade name 'Gulkhairo', are well known for their expectorant, cooling and diuretic properties and used in many indigenous cough mixtures in India. The present paper deals with the detailed pharmacognosy of the floral parts including morphological, anatomical, phytochemical and fluorescence characters. Some of the diagnostic features of the drug are : pedicel characterized by multicellular appendages, stellate hairs, rosette crystals of Ca-oxalate, starch sheath and large sized mucilage canals; sepals having distinctive multicellular appendages arranged in a semilunar fashion present adaxially at their base; monadelphous stamens, pollen grains pentaporate provided with dimorphic spines; placentation axile, ovules campylotropous; dark green fluorescence of the powder with nitrocellulose in amyl acetate and yellow fluorescence of trichomes under Fluorescence microscope.

• 대한화장품학회지
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• 제44권3호
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• pp.295-302
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• 2018

본 연구에서는 천연 화장품 소재 개발을 위하여 접시꽃 캘러스 생리활성 효능에 대해서 평가하였다. 접시꽃캘러스 추출물의 항산화 효능은 DPPH, ABTS, FRAP assay를 통해서 확인하였다. 그 결과 접시꽃캘러스 추출물은 농도 의존적으로 강력한 항산화 능력을 확인되었다. 더불어, 접시꽃 캘러스 추출물은 10 mg/mL 의 농도에서 세포 내 ROS를 효과적으로 감소시키는 것으로 확인되었다. 접시꽃 캘러스 추출물의 미백효능을 평가하기 위해 tyrosinase 저해 효과를 확인한 결과, 접시꽃 캘러스 추출물은 10 mg/mL 의 농도에서 tyrosinase 활성을 51% 감소시키는 것으로 확인되었다. 이상의 결과를 바탕으로, 접시꽃 캘러스 추출물은 항산화 및 미백효능을 지닌 화장품 기능성 소재로서 적용 가치가 높은 천연소재로 사료된다.

• The Plant Pathology Journal
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• 제36권5호
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• pp.468-475
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• 2020

Malva vein clearing virus (MVCV) is a member of the Potyvirus species, and has a negative impact on the aesthetic development of Alcea rosea. It was first reported in Germany in 1957, but its complete genome sequence data are still scarce. In the present work, A. rosea leaves with vein-clearing and mosaic symptoms were sampled and analyzed with small RNA deep sequencing. By denovo assembly the raw sequences of virus-derived small interfering RNAs (vsiRs) and whole genome amplification of malva vein cleaning virus SX strain (MVCV-SX) by specific primers targeting identified contig gaps, the full-length genome sequences (9,645 nucleotides) of MVCV-SX were characterized, constituting of an open reading frame that is long enough to encode 3,096 amino acids. Phylogenetic analysis showed that MVCV-SX was clustered with euphorbia ringspot virus and yam mosaic virus. Further analyses of the vsiR profiles revealed that the most abundant MVCV-vsiRs were between 21 and 22 nucleotides in length and a strong bias was found for "A" and "U" at the 5′-terminal residue. The results of polarity assessment indicated that the amount of sense strand was almost equal to that of the antisense strand in MVCV-vsiRs, and the main hot-spot region in MVCV-SX genome was found at cylindrical inclusion. In conclusion, our findings could provide new insights into the RNA silencing-mediated host defence mechanism in A. rosea infected with MVCV-SX, and offer a basis for the prevention and treatment of this virus disease.