Rhododendrons in Indian Himalayan Region: Diversity and Conservation

K. Chandra  Sekar; Sunil Kumar  Srivastava

doi:10.4236/ajps.2010.12017

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AJPS Vol.1 No.2 , December 2010

Rhododendrons in Indian Himalayan Region: Diversity and Conservation

K. Chandra Sekar, Sunil Kumar Srivastava

Abstract: The genus Rhododendron of Indian Himalayan Region (IHR) has been enumerated in the present paper. A total of 87 species, 12 subspecies and 8 varieties of Rhododendrons recorded in IHR, among these 6 species and one subspecies are reported from Western Himalaya. The maximum concentration of 86% observed in Arunachal Pradesh (75 species). The species of Rhododendrons exhibit significant diversity in habit and broad range of distribution from the altitude of 800-6000 m. and the best range is observed in 3001-3500 m altitudes. In analysis revealed 20 taxa are endemic, 30 are rare, 24 are threatened / endangered, 3 are vulnerable and 47 taxa have to be assessed. The major threats to rhododendrons are deforestation and unsustainable extraction for firewood and incense by local people has been discussed.

Keywords: Rhododendrons, Indian Himalayan Region, Ericaceae, India

Cite this paper: nullK. Sekar and S. Srivastava, "Rhododendrons in Indian Himalayan Region: Diversity and Conservation," American Journal of Plant Sciences, Vol. 1 No. 2, 2010, pp. 131-137. doi: 10.4236/ajps.2010.12017.

References

[1] C. Linnaeus, “Species Plantarum,” Vol. 1, London, 1753, pp. 392.

[2] D. J. Mabberley, “Mabberley’s Plant-Book. A Portable Dictionary of Plants, Their Classifications and Uses,” 2nd Edition, Cambridge University Press, Cambridge, 2008.

[3] U. C. Pradhan, “A Preliminary enumeration of Rhododendrons of the Indian region—Part 1,” Himalayan Plant Journal, Vol. 3, No. 8, 1985, pp. 110-123.

[4] J. Cullen, “A Revision of Rhododendron. I. Subgenus Rhododendron Sections Rhododendron and Pogonanthum,” Notes from the Royal Botanic Garden Edinburgh Vol. 39, 1980, pp. 1-207.

[5] D. F. Chamberlain, “A Revision of Rhododendron II. Subgenus Hymenanthes,” Notes from the Royal Botanic Garden Edinburgh, Vol. 39, 1982, pp. 209-486.

[6] W. R. Philipson and M. N. Philipson, “A Revision of Rhododendron III. Subgenera Azaleastrum, Mumeazalea, Candidastrum and Therorhodion,” Notes from the Royal Botanic Garden Edinburgh, Vol. 44, 1986, pp. 1-23.

[7] D.F. Chamberlain and S. J. Rae, “A revision of Rhododendron IV. Subgenus Tsutsusi,” Edinburgh Journal of Botany, Vol. 47, 1990, pp. 89-200.

[8] K. A. Kron, “A Revision of Rhododendron Section Pentanthera,” Edinburgh Journal of Botany, Vol. 50, 1993, pp. 249-364.

[9] W. S. Judd and K. A. Kron, “A Revision of Rhododendron VI. Subgenus Pentanthera (Sections Sciadorhodion, Rhodora, and Viscidula),” Edinburgh Journal of Botany, Vol. 52, 1995, pp. 1-54.

[10] U.C. Pradhan, “A Preliminary Enumeration of Rhododendrons of the Indian region—Part 2,” Himalayan Plant Journal, Vol. 4, No. 11-12, 1986, pp. 73-76.

[11] R.B. Ghosh and U.P. Samaddar, “The Rhododendrons of the North-East India,” Journal of Economic and Taxonomic Botany, Vol. 13, No. 1, 1989, pp. 205-220.

[12] D. Bhattacharyya and M. Sanjappa, “Rhododendrons Habitats in India,” Journal of American Rhododendron Society Vol. 62, No. 1, 2008, pp. 14-18.

[13] A. R. K. Sastry and P.K. Hajra, “Rare and endemic species of Rhododendrons in India—A Preliminary Study,” In: S. K. Jain and R. R. Rao, Eds., An Assessment of Threatened Plants of India, BSI, Calcutta, 1983, pp. 222-231.

[14] A. A. Mao, K. P. Singh and P. K. Hajra, “Rhododendrons,” In: N. P. Singh and D. K. Singh, Eds., Floristic Diversity and Conservation Strategies in India, BSI, Calcutta, 2002, pp. 2167-2202.

[15] U. C. Pradhan and S. T. Lachungpa, “Sikkim Himalayan Rhododendrons,” Primulaceae Books, Kalimpong, 1990.

[16] K. K. Singh, S. Kumar, L. K. Rai and A. P. Krishna, “Rhododendron Conservation in Sikkim Himalaya,” Current Science, Vol. 85, 2003, pp. 602-606.

[17] J. Y. Yumnam, “Rhododendrons in Meghalaya Need Attention,” Current Science, Vol. 95, No. 7, 2008, pp. 817-818.

[18] D. K. Singh and P. K. Hajra, “Floristic Diversity,” In: G. S. Gujral and V. Sharma, Eds., Changing Perspectives of Biodiversity Status in the Himalaya, British Council, New Delhi, 1996.

[19] S. S. Samant, U. Dhar and L. M. S. Palni, “Medicinal Plants of Indian Himalaya: Diversity Distribution Potential Values,” Gyanodaya Prakashan, Nainitial, 1998.

[20] N. P. Singh, J. R. Sharma, K. P. Singh and V. Mudgal, “Species Diversity in Angiosperms,” In: N. P. Singh and D. K. Singh, Eds., Floristic Diversity and Conservation Strategies in India, Botanical Survey of India, Kolkata, Vol. 5, 2002, pp. 1631-1674.

[21] Anonymous, “IUCN Red List of Threatened Species,” Version 2009.2. http://www.iucnrelist.org/

[22] F. Mingyuan, F. Ruizheng, H. Mingyou, H. Linzhen, Y. Hanbi and D. F. Chamberlain, “Rhododendron,” In: W. Zhengyi, P. H. Raven and H. Deyuan, Eds., Flora of China, Science Press, Beijing and Missouri Botanical Garden Press, St. Louis. 2005, Vol. 14, pp. 260-455.

[23] P. Thakur, Y. D. Sharma, B. Kashyap and A. Thakur, “Vegetative propagation of native ornamentals of Himachal Pradesh in India,” Abstract of XXVII International Horticultural Congress—IHC2006, Himachal Pradesh, 2006.

[24] K. K. Singh, S. Kumar and R. Shanti, “Raising Planting Materials of Sikkim Himalayan Rhododendron through Vegetative Propagation Using Air-Wet Technique,” Journal of American Rhododendron Society, Vol. 62, 2008, pp. 136-138.

[25] K. K. Singh, and B. Gurung, “In vitro Propagation of R. maddeni Hook. f. an Endangered Rhododendron Species of Sikkim Himalaya,” Notulae Botanicae Horti Agrobotanici Cluj-Napoca, Vol. 37, No. 1, 2009, pp. 79-83.

[26] G. Lloyd and B. McCown, “Community-Feasible Micropropagation of Mountain Laurel, Kalmia latifolia, by Use of Shoot Tip Culture,” Proceedings of International Plant Propagation Society, Vol. 30, 1981, pp. 421-427.

[27] W. C. Anderson, “A revised Medium for Shoot Proliferation of Rhododendron,” Journal of American Society & Horticultural Science, Vol. 109, 1984, pp. 343-347.

[28] G. C. Douglas, “Propagation of Eight Cultivars of Rhododendron in vitro Using Agar-Solidified and Liquid Media and Direct Rooting of Shoots in vivo,” Scientia Horticulturae, Vol. 24, 1984, pp. 337-347.

[29] B.H. McCown and G.B. Lloyd, “A Survey of the Response of Rhododendrons to in vitro Cultures,” Plant cell tissue and organ culture, Vol. 2, 1985, pp. 77-85.

[30] B. A. Briggs, S. M. McCulloch and L. A. Caton, “In vitro propagation of Rhododendron,” Acta Horticulturae, Vol. 364, 1994, pp. 21-26.

[31] P. W. Evers, J. Donkers, A. Prat and E. Vermeer, “Micropropagation of forest trees through tissue culture,” Centre for Agricultural Publishing and Documentation, Wageningen, 1988.

[32] R. Almeida, S. Gon?alves and A. Romano, “In vitro Micropropagation of Endangered Rhododendron ponticum L. subsp. baeticum (Boissier & Reuter) Handel-Mazzetti,” Biodiversity and Conservation Vol. 14, No. 5, 2005, pp. 1059-1069.