AGARWOOD: THE PRECIOUS TREE

Agarwood is a highly valuable fragrant wood of Aquilaria spp. It is used for incense, perfume, traditional medicine, and other products in all over the world. The chemical constitutes of agarwood include 2-(2-phenylethyl)-4H-chromen-4-one derivatives, terpenoids (sesquiterpenes), flavonoids etc.The aromatic properties and resin character of agarwood are influence by the species, geographical distribution. This review emphasizes the mass cultivation of Aquilaria tree. Mass cultivation by various induction technologies which serve as a sustainable source to obtain agarwood is necessary in order to increase agarwood supply in the global market.

Assessment of the Role of Environmental factors and Associated Plants for the Mass Cultivation of Santalum album L in Nepal and India

Sandalwood (White Sandal) is the fragrant heartwood of some species of genus Santalum. The widely distributed and economically important Santalum genus belongs to the family Santalaceae which includes 30 genera with about 400 species, many of which being completely or partially parasitic (John, 1947). The word Sandal has been derived from Chandana (Sanskrit), Chandan (Persian), Savtador (Greek) and Santal (French). There are references of Sandalwood in Indian mythology, folklore and ancient scripts. ‘Chandana’ the Sanskrit name ascribed to Santalum album L. was known and used in India from the earliest historic times and is frequently mentioned in the ancient Sanskrit writings, some of which dated before Christian era. Kautilya’s Arthashastra (320 B.C.) considered Sandal as one of the important forest products to increase royal revenue.

Isolation and characterization of a motility-defective mutant of Euglena gracilis

Euglena gracilis is a green photosynthetic microalga that swims using its flagellum. This species has been used as a model organism for over half a century to study its metabolism and the mechanisms of its behavior. The development of mass-cultivation technology has led to E. gracilis application as a feedstock in various products such as foods. Therefore, breeding of E. gracilis has been attempted to improve the productivity of this feedstock for potential industrial applications. For this purpose, a characteristic that preserves the microalgal energy e.g., reduces motility, should be added to the cultivars. The objective of this study was to verify our hypothesis that E. gracilis locomotion-defective mutants are suitable for industrial applications because they save the energy required for locomotion. To test this hypothesis, we screened for E. gracilis mutants from Fe-ion-irradiated cell suspensions and established a mutant strain, ${\mathrm{M}}_{3}^{-}$ZFeL, which shows defects in flagellum formation and locomotion. The mutant strain exhibits a growth rate comparable to that of the wild type when cultured under autotrophic conditions, but had a slightly slower growth under heterotrophic conditions. It also stores 1.6 times the amount of paramylon, a crystal of β-1,3-glucan, under autotrophic culture conditions, and shows a faster sedimentation compared with that of the wild type, because of the deficiency in mobility and probably the high amount of paramylon accumulation. Such characteristics make E. gracilis mutant cells suitable for cost-effective mass cultivation and harvesting.