Morphological studies and development of Ex-situ protocol for rehabilitation of threatened Rheum species under nursery conditions

Abstract

<p><em>Rheum</em> is a strong vigorous plant and can live long even in tough conditions. The <em>Rheum</em> species have been domesticated as medicinal plants for human consumption. <em>Rheum</em> species are perennial stout herbs. Rhubarb is a common English name of the genus <em>Rheum</em>. Rhubarb is a plant name for the many different species of <em>Rheum</em>, distributed in the temperate and sub tropical regions of Himalaya from Kashmir to Sikkim and growing wild in the mountains of the Western and North-western provinces of China and adjoining Tibetan territory. It is cultivated much in Europe and the United States. In Kashmir Himalaya, it ranges from an altitude of 1700 - 5500m. It is famous for its medicinal uses. Roots are long and stout. Stem is erect, hollow, sulcate, glabrous or strigose. It is native to Asia-Temperate to Asia – Tropical, from China to India, Nepal and Pakistan. In India, its found in Himachal Pradesh Jammu & Kashmir and Uttar Pradesh. In Jammu and Kashmir, it grows on open slopes and shrubberies in Kashmir, Leh and Zanaskar valley between 3000-5000 m, where <em>R.webbianum</em> is found. The <em>Rheum spiciforme</em> is also one of most known medicinal plant and is found on high altitudes of Gurez valley(3000m 5000m). <em>Rheum</em> also prefers a full sunny location and thrives in a moist, fertile soil. Most <em>Rheum</em> species can handle heavier clay soils better than many other herbs and makes a striking addition to the spring landscape. Rhubarb is propagated from seeds, seedlings, or pieces of rhizome. </p>