Effects of gamma irradiation on color characteristics and biological activities of extracts of Lonicera japonica (Japanese honeysuckle) with methanol and acetone

Using growth rate method, biological activities of 20 water extracts from 20 different plants were assayed against Colletotrichum gloeosporioides and Agaricodochium camellia Liu. The results show the inhibition rates of the extracts of Syzygium aromaticum, Scutellaria altissima L, Aloe Vera, Lonicera japonica Thunb, Andrgraphis paniculata are more than 60%. The best inhibition effects was S. aromaticum, respectively 96.2% and 98.2%. The toxicity test indicates that the EC50 of S. aromaticum and S. altissima L extracts and the mixture at the 1:1, 1:2, 1:5, 2:1, 5:1 volume ratio against C. gloeosporioides and A. camellia are, respectively ,4.2 and 3.68mg/ml,4.52 and 6.90 mg/ml,5.28 and 5.33 mg/ml,5.84 and 7.01 mg/ml,4.89 and7.01 mg/ml,5.24 and 6.11 mg/ml,4.77 and 5.65mg/ml. Synergistic interaction values are >0.5 and <1.5.

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Analysis of Flower Color Variations at Different Developmental Stages in Two Honeysuckle (Lonicera Japonica Thunb.) Cultivars

HortScience ◽

10.21273/hortsci13819-18 ◽

2019 ◽

Vol 54 (5) ◽

pp. 779-782 ◽

Cited By ~ 1

Author(s):

Jianjun Li ◽

Xiaoya Lian ◽

Chenglin Ye ◽

Lan Wang

Keyword(s):

Chlorophyll Content ◽

Cross Section ◽

Molecular Mechanisms ◽

Developmental Stages ◽

Flower Color ◽

Lonicera Japonica ◽

Carotenoid Content ◽

Factors Affecting ◽

Japanese Honeysuckle ◽

Corolla Color

Lonicera japonica Thunb., known as Japanese honeysuckle or golden-and-silver honeysuckle, belongs to the honeysuckle family and is native to eastern Asia, including China, Japan, and Korea. Microscopy, spectrophotometry, colorimetry, and the Royal Horticulture Society of Colorimetric Card (RHSCC) were used to compare and analyze the pigment distribution, content, and color variations in the Yujin 2 and Damaohua cultivars at different developmental stages. There were notable differences in the corolla color and the cross-section color between different developmental stages and different varieties. The lightness (L*), redness (a*), and yellowness (b*) values were calculated for each period for the two cultivars to observe variation trends. The chlorophyll content in the corollas of both cultivars showed declining trends with different rates. The chlorophyll content decreased rapidly from the young period to the two white period, and changed gradually from the two white period to the golden period. Moreover, the carotenoid content declined slightly from the young period to the silver period and rose sharply during the golden period. The ratio of these two pigment contents increased dramatically during the golden period: by 11.51 and 6.53 times in ‘Yujin 2’ and ‘Damaohua’, respectively. There were significant differences in corolla color, cross-section color, and the content of three pigments between the two varieties of honeysuckle. distribution and variation of pigments were the key factors affecting the flower color of honeysuckle. This study provides a basis for the identification and breeding of honeysuckle varieties and lays a foundation for further studies on the function and molecular mechanisms of pigments.

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Effect Of Different Extraction Methods On Major Bioactive Constituents At Different Flowering Stages Of Japanese Honeysuckle (Lonicera Japonica Thunb.)

Agronomy & Agricultural Science ◽

10.24966/aas-8292/100021 ◽

2020 ◽

Vol 3 (1) ◽

pp. 1-9

Author(s):

Chen Bo-Ching ◽

Keyword(s):

Extraction Methods ◽

Lonicera Japonica ◽

Bioactive Constituents ◽

Japanese Honeysuckle

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