Lonicera japonica

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Japanese honeysuckle
Honeysuckle 2.jpg
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Dipsacales
Family:
Caprifoliaceae
Genus:
Lonicera
Species:
L. japonica
Binomial name
Lonicera japonica
Synonyms[1]
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  • Caprifolium chinense S.Watson ex Loudon
  • Caprifolium japonicum (Thunb.) Dum.Cours.
  • Caprifolium roseum Lam.
  • Lonicera brachypoda Siebold
  • Lonicera chinensis P. Watson
  • Lonicera fauriei H. Lév. & Vaniot
  • Lonicera shintenensis Hayata

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Lonicera japonica, the Japanese honeysuckle[2] or suikazura (スイカズラ／吸い葛 in Japanese; jinyinhua in Chinese; 忍冬 in Chinese and Japanese) is a species of honeysuckle native to eastern Asia including China, Japan and Korea. It is a twining vine able to climb up to 10 metres (33 ft) high or more in trees, with opposite, simple oval leaves 3–8 centimetres (1.2–3.1 in) long and 2–3 centimetres (0.79–1.18 in) broad. The flowers are double-tongued, opening white and fading to yellow, and sweetly vanilla scented. The fruit is a black spherical berry 3–4 millimetres (0.12–0.16 in) diameter containing a few seeds.[3]

It is an invasive species in a number of countries.

Cultivation and uses

This species is often sold by American nurseries as the cultivar 'Hall's Prolific' (Lonicera japonica var. halliana). It is an effective groundcover, and has pleasant, strong-smelling flowers. It can be cultivated by seed, cuttings, or layering. In addition, it will spread itself via shoots if given enough space to grow.

In both its native and introduced range, Japanese honeysuckle can be a significant source of food for deer, rabbits, hummingbirds and other wildlife.[4]

The variety L. japonica var. repens[5] has gained the Royal Horticultural Society's Award of Garden Merit.

Invasive species

Honeysuckle-1.jpg
Fruit

Japanese honeysuckle has become naturalized in Argentina, Australia, Brazil, Mexico, New Zealand and much of the US, including Hawaii, as well as a number of Pacific and Caribbean islands.

Japanese honeysuckle is classified as a noxious weed in Texas,[6] Illinois, and Virginia, and is banned in New Hampshire.[7] It grows extremely rapidly in parts of America such as southwestern Ohio and is virtually impossible to control in naturalized woodland edge zones due to its rapid spread via tiny fruit seeds. It forms a tall dense woody shrub layer that aggressively displaces native plants. It is also very difficult to manage in semi-wild areas, such as in large rural yards.

It is listed on the New Zealand National Pest Plant Accord as an unwanted organism.[8]

It can be controlled to some degree via labor-intensive methods such as cutting or burning the plant to root level and repeating at two-week intervals until nutrient reserves in the roots are depleted. It can also be controlled through annual applications of glyphosate, or through grubbing if high labor and soil destruction are not of concern. Cutting the honeysuckle to within 5–10 cm of the ground and then applying glyphosate has proven to be more effective[citation needed], provided that the mixture is rather concentrated (20–25%) and is applied immediately after making the cut.

Chemistry

Lonicera japonica contains methyl caffeate, 3,4-di-O-caffeoylquinic acid, methyl 3,4-di-O-caffeoylquinate, protocatechuic acid, methyl chlorogenic acid and luteolin. These compounds have an inhibitory effect on human platelet aggregation that may explain the possible role of Japanese honeysuckle in maintaining vascular homeostasis.[9][10] The two biflavonoids, 3′-O-methyl loniflavone and loniflavone along with luteolin and chrysin can be isolated from the leaves.[11] Other phenolic compounds present in the plant are hyperoside, chlorogenic acid and caffeic acid.[12]

The two secoiridoid glycosides, loniceracetalides A and B, can be isolated, together with 10 known iridoid glycosides, from the flower buds.[13]

The plant also contains the saponins loniceroside A and B[14] and the antiinflammatory loniceroside C.[15]

Traditional Chinese medicine

In traditional Chinese medicine,[16] Lonicera japonica is called rěn dōng téng (Chinese: 忍冬藤;[16] literally "winter enduring vine"[citation needed]) or jīn yín huā[16] (Chinese: 金銀花; literally "gold silver flower"). Alternative Chinese names include er hua and shuang hua.[17] In Korean, it is called geumeunhwa.[citation needed] The dried leaves and flowers (Flos Lonicerae Japonicae) are employed in traditional Chinese medicine, being used to treat fever, headache, cough, thirst and sore throat.[18]

In 2014, Chinese researchers led by Dr Chen-Yu Zhang of Nanjing University reported that "MIR2911, a honeysuckle (HS)-encoded atypical microRNA, directly targets IAVs with a broad spectrum."[19]

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Flora of Taiwan: Lonicera japonica
  4. ↑ Forest Plants of the Southeast and Their Wildlife Uses, James H. Miller and Karl V. Miller, University of Georgia Press, Revised Ed. 2005, p.278
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ http://gencourt.state.nh.us/rules/agr3800.html
  8. ↑ Biosecurity New Zealand - Japanese honeysuckle
  9. ↑ Inhibition of platelet activation and endothelial cell injury by polyphenolic compounds isolated from Lonicera japonica Thunb. W.-C. Chang and F.-L. Hsu, Prostaglandins, Leukotrienes and Essential Fatty Acids, Volume 45, Issue 4, April 1992, Pages 307–312, doi:10.1016/0952-3278(92)90088-Z
  10. ↑ Constituents from Lonicera japonica. Li-Yan Peng, Shuang-Xi Mei, Bei Jiang, Hong Zhou, Han-Dong Sun, Fitoterapia, Volume 71, Issue 6, December 2000, Pages 713–715, doi:10.1016/S0367-326X(00)00212-4
  11. ↑ Biflavonoids from Lonicera japonica. Neeraj Kumar, Bikram Singh, Pamita Bhandari, Ajai P. Gupta, Sanjay K. Uniyal and Vijay K. Kaul, Phytochemistry, December 2005, Volume 66, Issue 23, Pages 2740–2744, doi:10.1016/j.phytochem.2005.10.002
  12. ↑ Determination of Phenolic Acids and Flavones in Lonicera japonica Thumb. by Capillary Electrophoresis with Electrochemical Detection. Youyuan Peng, Fanghua Liu and Jiannong Ye, Electroanalysis, March 2005, Volume 17, Issue 4, pages 356–362, doi:10.1002/elan.200403102
  13. ↑ Secoiridoid glycosides from the flower buds of Lonicera japonica. Rie Kakuda, Mio Imai, Yasunori Yaoita, Koichi Machida and Masao Kikuchi, Phytochemistry, December 2000, Volume 55, Issue 8, Pages 879–881, doi:10.1016/S0031-9422(00)00279-X
  14. ↑ Triterpenoid saponins from the aerial parts of Lonicera japonica. Kun Ho Son, Keun Young Jung, Hyeun Wook Chang, Hyun Pyo Kim and Sam Sik Kang, Phytochemistry, March 1994, Volume 35, Issue 4, Pages 1005–1008, doi:10.1016/S0031-9422(00)90656-3
  15. ↑ Loniceroside C, an Antiinflammatory Saponin from Lonicera japonica. Wie Jong Kwak, Chang Kyun Han, Hyeun Wook Chang, Hyun Pyo Kim, Sam Sik Kang and Kun Ho Son, Chem. Pharm. Bull., 2003, volume 51, issue 3, pages 333—335 (article)
  16. ↑ 16.0 16.1 16.2 Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Chinese Medical Herbology and Pharmacology, John and Tina Chen, Art of Medicine Press, 1st ed. 2001, p. 171
  18. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  19. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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