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Introduction
1.1. Amla (Emblica officinalis)
Amla (Emblica officinalis) (EO) has a hallowed position in Ayurveda- an Indian indigenous system of medicine1. According to belief in Indian mythology, Amla is the first tree to be created in the universe; which belongs to the family of Euphorbiaceae and is also known as Phyllanthus emblica or Indian gooseberry1. Amla is native to India and also grows in tropical and subtropical regions of Pakistan, Uzbekistan, Sri Lanka, South East Asia, China and Malaysia1. The fruits of Amla are widely used in the Ayurvedic preparation and are believed to increase defence against diseases2. It has a beneficial role in degenerative diseases like cancer, diabetes, liver treatment, ulcer, anaemia, heart trouble1 and also is an important constituent in hepatoprotective formulas available2.
1.1.1. Morphology
Amla tree is a small to medium sized deciduous tree with an average height of 8-18 m, with thin light grey bark exfoliating in small thin irregular flakes, exposing the fresh surface of a different color underneath the older bark. The average girth of the main stem is 70 cm. In most cases, the main trunk is divided into 2 to 7 scaffolds very near to the base3. The image of Amla tree is shown in Fig 1.1a. Leaves are 10 -13 mm long, 3 mm wide, closely set in pinnate faishon3 which makes the branches feathery in general appearance. After setting of the fruits leaves develop. Flowers are unisexual, 4 to 5 mm in length4, pale green in color, borne in leaf axils in clusters of 6 to 10. Fruits are fleshy, almost depressed to globose shape, 2.1-2.4 cm in diameter, 5.3-5.7 g in weight, 4.5-5.0 mL in volume. The image of Amla fruit is given in Fig 1.1b. The stone of the fruit is 6 ribbed, splitting into three segments4 each containing usually two seeds; seeds are 4-5 mm long and 2-3 mm wide, each weighing 572 to 590 mg4-5.
1.1.2. The fruiting season of Amla
Amla is a deciduous tree and the emergence of new shoots starts in the beginning of April7. The fruiting season of Amla fruit is exceptionally long. The fruit become fit for harvesting in December which can be retained on the tree up to March without any significant loss in quality or yield. The picking of fruit is generally in January to March. Amla tree is a heavy bearer and the fruits also remain free from the attacks of birds and wild animals8.