Laxmi Chauhan , R. D. Raturi , Sangeeta Gupta

Abstract

Anatomical parameters of wood quality such as fibre characteristics, vessel frequency and diameter and proportion oftissues were examined in 8 year old trees of six Populus deltoides clones growing in plantations. Statistical analyses were conducted to determine clonal variations and effect of age on anatomical properties. The analysis indicated significant clonal variation in specific gravity, fibre length vessel length, fibre diameter, lumen diameter, vessel frequency and vessel diameter. The specific gravity, fibre lengt.h and vessel length also show an increase with age. The specific gravity has been found to be positively correlated with fibre length in all the clones but with vessel diameter only in 4 clones. A relative correlation was also observed between vessel area and specific gravity. Cell type percentage was not found to be significantly different among the clones but increase in fibre percentage is found to be related to the decrease in vessel percentage. The variation in wood quality parameters studied offers possibilities for selection of breeding stock with desirable wood quality.

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Laxmi Chauhan , R. D. Raturi , R. V. Rao , R. Dayal

Abstract

Wood Anatomy of 8 genera of Indian Flacourtiaceae has been described in detail. The study indicates that type of ray-vessel pitting and perforation plate are of diagnostic value in separating the genera Hydnocarpus and Gynocardia. The remaining genera have more or less similar anatomical features. However the important anatomical features have been tabulated for facilitating specific identification.

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R. Vijendra Rao , R. Dayal , R. D. Raturi

Abstract

Wood Anatomy of the Indian Myristicaceae viz. Gymnacranthera, Horsfieldia, Knema and Myristica has been described in detail. The study indicates that the four Indian genera can be easily distinguished from each other on the basis of their wood structure. Woods of some foreign genera both African and American have also been investigated for a better understanding of their relationship with the Asiatic members Of the family and to confirm certain observations made by earlier workers. The occurrences of reticulate, irregular anastomosing type of vesselperforations in Pycnanthus and scalariform type in Cephalosphaera (both African genera) has been recorded for the first time Observations also show that oil cells and crystals in the rays are completely lacking in the, African and Indian representatives. Other observations which are contrary or in agreement to the findings of the earlier workers have also been recorded.

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R. D. Raturi , R. Dayal

Abstract

Anatomical structure of the wood of Clethra monoslachya Rebder & Wilson of the family Cletbraceae has been described.

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