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V. S. Dadwal , S. S. Bisen , M. Chaurasia , Jamaluddin

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K. Palanisamy , S. S. Bisen

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Laxmi Chauhan , S. S. Bisen , S. P. Agrawal

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This paper deals with the leaf epidermal features of 10 species of Bambusa Schreb. The observations are well illustrated through photomicrographs and the diagnostic features are tabulated for identification purposes.

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P. L. Soni , S. S. Bisen

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Naturally exuded gums are in use in different food preparations. Gums are natural polymers of monosugars. SEM studies of nine monosaccharides, three disaccharides and two gum polysaccharides were undertaken to determine their morphology. Monosaccharides and disaccharides exhibited their distinct crystalline morphology. Naturally exuded Acacia catechu gum and Prosopis juliflora seed polysaccharides also indicated characteristic morphology.

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S. S. Bisen , G. P. Mishra , S. C. Sharm

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This study was taken up mainly for evaluation of the importance of epidermal features on the culm and leaf of bamboos. Critical analysis of the epidermal features present on the culm and leaf surface from the 36 species belonging to 22 genera either naturally growing or cultivated, show that the epidermal features are very useful in differentisting the genera and their species. The culm epidermis however is not that reliable, due to the variations from bottom to the top of the culm, associated with encrustations masking the details. The leaf epidermal features can be relied upon for identification, of genera and their species, as they show no variations due to age, locality, soil and environmental factors. If this approach is widely tried on the other genera and species growing in China, Japan, Indonesia, Malaysia and South America, the validity of this approach can be furtber tested, which will go a long way in bamboo identification and classification in the absence of flower.

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Laxmi Chauhan , S. S. Bisen , S. P. Agrawal

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A systematic study of leaf epidermis of Indian bamboos was undertaken under light microscope for facilitating their identification based on epidermal features. The present paper deals with 10 spcies of the genus Dendrocalamus Nees. Epidermal features of diagnostic value have been tabulated and illustrated through photomicrographs.

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S. S. Bisen , V. V. Prabhu , K. S. Theagarajan

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Eucalyptus hybrid is grown on a large scale throughout the country mainly as pulpwood and to some extent as fuelwood. The leaves of Eucalyptus hybrid go to waste at present even-through they yield essential oil containing pinenes, cineole and other aromatic chemicals. Earlier investigations showed that some of the trees yield 'cineole-rich' oil resembling that of E. globulus (blue gum). As they are morphologically indistinguishable from others, a simple and rapid test based on the relationship between refractive index and cineole content of the oil was developed to distinguish these trees from others The results of preliminary studies under light microscope supported by SEM or the epidermal features of the leaves indicate that stomatal characters such as stomatal frequency, wax plugging and raticulate cuticle can serve as useful criteria for differentiating cineole-rich ones from others. Lesser number of stomata per unit area appears to be the most important characteristic of a 'cineole-rich' leaf. This will permit screening, using equipment like LM that could be set up more easlly in the field without the need of a distillation unit and its necessary heating arrangement.

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