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BAMBOOS OF INDI A

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Introduction<br />

9<br />

10<br />

➤<br />

Collection of seeds after gregarious flowering<br />

➤<br />

Separation of seeds by winnowing<br />

➤<br />

One year old seedling suitable for multiplication<br />

season and part of the culm. The nodes contain less water soluble extractives, pentosans<br />

and lignin but more cellulose than internodes. Silica content is high in the epidermis, with<br />

very little in the nodes and is absent in the internodes. Cellulose in bamboo is holocellulose<br />

and consists of 1, 4 bonded hydroglucose units and the degree of polymerization is<br />

higher than that of dicotyledonous woods. The bamboo hemicellulose consists of<br />

4-O-methyl D-glucuronic acid, L-arabinose and D-xylose. Bamboo lignin, which is typical<br />

of the grasses, is built up from three phenyl-propane units, p-coumaryl, coniferyl and<br />

sinapyl alcohols interconnected through biosynthetic pathways (Liese, 1987).<br />

11<br />

The chemical composition of 18 species belonging to 10 genera is known from India (Singh<br />

et al., 1976; Singh and Bhola, 1978). Hemicellulose studied for three species showed a<br />

difference in the yield of sugars (Rita Dhawan and Singh, 1982). The difference in lignin<br />

content of various species is negligible. A few reports are available on nutritive value of<br />

12

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