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Mamgain, S. K.
- Ex-situ Conservation of some Endemic and Threatened Plant Species of India
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Indian Forester, Vol 127, No 5 (2001), Pagination: 552-562Abstract
Plant diversity in Indian subcontinent is under threat mainly due to human activities and reproductive isolation of the species. It is estimated that 15-20 per cent of our vascular flora i.e. about 2,500 species of plants are under various degrees of threat of which about 1,000 species are native to tropical and subtropical regions of the country. The increasing loss of plant diversity has turned the attention of various agencies to take the immediate conservation measures and save it from further depletion and extinction. Besides protection of species in-situ, the off-site (ex-situ) conservation of species particularly of those which are rare and endangered, has become an important tool for conservation of biological diversity. Considering the urgency for conservation of plant diversity we have taken up the task of ex-situ conservation of some tropical and subtropical threatened plant species of India in the N.B.R.I. Botanic Garden. The main aim of this work is to acclimatise, cultivate, propagate and multiply such taxa under ex-situ condition and subsequently reintroduce them to natural or semi-natural habitats together with maintenance of the species ex-situ in the botanic garden.- Diversity, Ecology and Distribution of Indian Lactuceae (Asteraceae)
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Indian Forester, Vol 125, No 4 (1999), Pagination: 411-420Abstract
The present communication deals with diversity, ecology and distribution of Indian Lactuceae (Asteraceae) which is represented by 10 genera namely Lactuca L., Prenanthes L., Launaea Cass., Sonchus L., Reichardia Roth, Cicerbita Wallr., Ixeris, Cass., Chondrilla L., Dubyaea DC and Youngia Cass., with 80 taxa in India. Among these 9 genera and 51 taxa are from the Western Himalaya, 7 genera and 31 taxa from Eastern Himalaya, 5 genera and 12 taxa from Western and Eastern Ghats and 6 genera and 15 taxa from Gangetic plains, Rajasthan and other parts of the country. The Lactuceae exhibit wide range of variations in its ecological habitats from sea coast to 5000 m in elevations and exhibit enormous diversity both intraspecifically and interspecifically. The Himalayas are shown to be major centre for Lactuceae diversity and distribution followed by Western Ghats and Gangetic plains. At generic level Lactuca exhibits maximum diversity with 25 species followed by Youngia and Cicerbita, all three are predominantly Himalayan. The genus Dubyaea is endemic to Sino-Himalayan region with 9 species, while 6 of its 9 species are highly localized in this region. The maximum diversity of Lactuceae in the Himalaya is due to a variety of climatic conditions and altitudes which in turn has resulted in diverse habitats. The Lactuceae inhabit every conceivable habitats and reveals a great amount of variation in the populations of different species. The distribution analysis of Lactuceae reveals that its members are chiefly distributed in the Himalaya and poorly represented in Western Ghats, Eastern Ghats and Gangetic plains.- Value Chains Promotion and Development in the Medicinal and Aromatic Plants Sector with Emphasis on Improvement of Sausurea Costus (kuth) and Picrorhiza Kurrooa (kutki) Value Chains in the Chamoli District of Uttarakhand
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1 Deputy Director, MV
1 Deputy Director, MV