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1

Copper oxide nanoparticle toxicity in mung bean (Vigna radiata L.) seedlings: physiological and molecular level responses of in vitro grown plants

100%
Gopalakrishnan Nair P. M., Kim S.-H., Chung I. M.
Acta Physiologiae Plantarum
|
2014
|
tom 36
|
nr 11
In this study, the toxic effect of copper oxide nanoparticles (CuONPs) at the physiological and molecular level was investigated in mung bean (Vigna radiata L.) plants. The seedlings were grown in half strength Murashige and Skoog medium supplemented with different concentrations of CuONPs (0, 20, 50, 100, 200 and 500 mg l⁻¹) for 21 days under controlled growth conditions. Exposure to 200 and 500 mg l⁻¹ of CuONPs significantly reduced shoot length and biomass. Significant reduction in root length and biomass was observed upon exposure to all concentrations of CuONPs. Retardation of primary and lateral root growth was observed upon exposure to different concentrations of CuONPs. At 100, 200 and 500 mg l⁻¹ of CuONPs exposure, the total chlorophyll contents reduced significantly. Exposure to different concentrations of CuONPs has not resulted in any significant change in carotenoid contents. The proline content significantly increased upon exposure to 100, 200 and 500 mg l⁻¹ of CuONPs. Significant increase in hydrogen peroxide content and lipid peroxidation was observed in roots upon exposure to 20, 50, 100, 200 and 500 mg l⁻¹ of CuONPs. Histochemical staining with nitroblue tetrazolium and treatment with 30 -(p-hydroxyphenyl) fluorescein indicated a concentration-dependent increase in reactive oxygen species generation in roots. Exposure to CuONPs has resulted in excess lignification of roots cells as revealed by phloroglucionol-HCl staining. Gene expression analysis using real-time polymerase chain reaction showed modulations in the expression of CuZn superoxide dismutase, catalase and ascorbate peroxidase genes in roots of CuONPs exposed plants.
2

Profiling volatile and phenolic compound composition and characterization of the morphological and biological activities of Perilla frutescence Britton var. Japonica accessions

88%
Ghimire B. K., Yoo J. H., Yu C. Y., Kim S.-H., Chung I.-M.
Acta Physiologiae Plantarum
|
2019
|
tom 41
|
nr 07
This study was carried out to evaluate the morphological characteristics of Perilla accessions, as well as to determine their antioxidant, antimicrobial, and cytotoxic activities using crude extracts fractionated by different solvents, collected from different part of China and Japan. The composition and concentration of the phenolic compounds and volatile components in the Perilla accessions were determined using high-performance liquid chromatography (HPLC) and gas chromatography–mass spectrometry (GC–MS) analysis. HPLC analysis showed chlorogenic acid, homogentisic acid, myricetin, benzoic acid, and naringenin to be the dominant phenolic compounds in all the Perilla accessions. Beta-caryophyllene, isoegomaketone egomaketone, perillaketone, and perillene1-octen-3-ol were the dominant volatile compounds in Chinese accessions, and beta-caryophyllene, perillaldehyde, limonene, alpha-pinene, and 1-octen-3-ol in Japanese accessions. Accessions 140 and 141 showed higher DPPH radical scavenging activity (2 µg/mL). Ethyl acetate and hexane extracts from accessions 102 and 114 showed high antimicrobial activity against Staphylococcus aureus, Bacillus subtilis, Salmonella typhimurium, Klebsiella pneumonia, and Escherichia coli. Among all the tested microbes, S. aureus was the most sensitive to the tested extracts of accession. A wide and dose-dependent variation in the inhibition of cancer cells (H-1299 cells derived from lymph node) proliferation was observed. At an extract concentration of up to 1.50 µg/mL, the percentage of dead cells varied from 56.4 to 87.7%. These results suggest that the ethyl acetate and hexane extracts from Perilla accessions show potential antioxidant, antimicrobial, and cytotoxic activities and could be used as an important bioresource for the pharmaceutical and food industries.
3

Establishment of culturing conditions and assessment of antioxidant activity and somaclonal variation in the adventitious root suspension cultures of Oplopanax elatus Nakai

64%
Ghimire B.-K., Kim H.-Y., Seong E.-S., Yoo J.-H., Lee J.-H., Park S.-K., Kim S.-H., Yu C.-Y., Chung I.-M.
Acta Physiologiae Plantarum
|
2018
|
tom 40
|
nr 03
4

Ras-related proteins (Rab) are key proteins related to male fertility following a unique activation mechanism

64%
Bae J.-W., Kim S.-H., Kim D.-H., Ha J. J., Yi J. K., Hwang S., Ryu B.-Y., Pang M.-G., Kwon W.-S.
Reproductive Biology
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2019
|
tom 19
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nr 4
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