Notes on the Sikkim Himalayan rhododendrons: a taxa of great conservation importance

Rhododendrons form dominating species all along the temperate, subalpine and alpine zones in the Sikkim Himalaya. Rhododendron L. is one of the largest genus of the Ericaceae family, occurring in the higher altitudes having ecological significance and economic importance in addition to its splendiferous flowers. It has aesthetic, sacred, aromatic, medicinal and fuelwood values. There are 36 species with 45 different forms (including subspecies and varieties) in the Sikkim Himalaya. Using IUCN guidelines for categorization eight species are being evaluated according to population characters. It has been observed recently that the rhododendrons of the region are under pressure, which are basically exploitations, and some of the species are in the verge of extinction. An effort is made in this note to understand the current status of the rhododendrons in the region.

Notes on the Sikkim Himalayan rhododendrons: a taxa of great conservation importance

Rhododendrons form dominating species all along the temperate, subalpine and alpine zones in the Sikkim Himalaya. Rhododendron L. is one of the largest genus of the Ericaceae family, occurring in the higher altitudes having ecological significance and economic importance in addition to its splendiferous flowers. It has aesthetic, sacred, aromatic, medicinal and fuelwood values. There are 36 species with 45 different forms (including subspecies and varieties) in the Sikkim Himalaya. Using IUCN guidelines for categorization eight species are being evaluated according to population characters. It has been observed recently that the rhododendrons of the region are under pressure, which are basically exploitations, and some of the species are in the verge of extinction. An effort is made in this note to understand the current status of the rhododendrons in the region.

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  • Anderson WC (1975). Micropropagation of rhododendrons by tissue culture; part I Development of culture medium for multiplication of shoots. Proc Intl Plant Prop Soc 25: 129-135.
  • Badola HK, Singh KK, Gut Lepcha, Kumar S & Pradhan B (2006). Rare and threatened plant conservation park in Gangtok- Sikkim. Hima-Paryavaran 18(2): 15-16.
  • Bhattacharyya DM & Sanjappa M (2008). Rhododendron habitats in India. Journal American Rhododendrons Society 62: 14-18.
  • Chamberlain DR, Hyam G, Argent GF & Walter KS (1996). The Genus Rhododendron, Its Classification and Synonym. Royal Botanical Garden. Edinburgh. pp. 181.
  • Cowan AM & Cowan JM (1938). Trees of the Northern Bengal, Calcutta.
  • Gamble J (1936). A Manual of Indian Timbers, London.
  • Hooker JD (1849). Notes, chiefly botanical, made during an excursion from Darjeeling to Tonglu. J Asia Soc Beng 18: 419– 446.
  • Hooker JD (1949-51). The Rhododendron of the Sikkim Himalaya; being and account, botanical & geographical of the Rhododendron recently discovered in the mountains of eastern Himalaya. Reeve, London.
  • IUCN (2001). IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, UK.
  • Kumar S, Singh KK & Rai LK (2004). In Vitro Propagation of a endangered Sikkim Himalayan Rhododendron (R. maddeni) from cotyledonary nodal segments. J Am Rhododendrons Soc 58 (2): 101.
  • Leach DG (1961). Rhododendrons of the World. Charles Scribners's Sons, New York.
  • Paul A, Khan ML, Arunachalam A & Arunachalam K (2005). Biodiversity and conservation of rhododendrons in Arunachal Pradesh in the Indo-burma biodiversity hotspot. Current Science 89 (4): 623.
  • Pradhan UC & Lachungpa ST (1990). Sikkim Himalayan Rhododendrons. Primulaceae Books, Kalimpong, West Bengal.
  • Singh KK (2008). In Vitro Plant Regeneration of an endangered Sikkim Himalayan Rhododendron (R. maddeni Hook. f.) from alginate-encapsulated shoot tips. Biotechnology 7(1): 144-148.
  • Singh KK, Kumar S, Rai LK & Krishna AP (2003). Rhododendron conservation in Sikkim Himalaya. Current Science 85 (5): 602.
  • Singh, KK, Kumar, S & Pandey A (2008a). Soil treatments for improving seed germination of rare and endangered Sikkim Himalayan Rhododendrons. World J Agric Sci 4 (2): 288-296.
  • Singh KK, Kumar, S & Shanti R (2008b). Raising planting materials of Sikkim Himalayan Rhododendron through vegetative propagation using “Air-wet technique”. J Am Rhododendrons Soc 62: 136-138.
Turkish Journal of Botany-Cover
  • ISSN: 1300-008X
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
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