• Parveen Farooqui

      Articles written in Proceedings – Plant Sciences

    • Seasonal changes in the ultrastructure of cambium ofFagus sylvatica L.

      Parveen Farooqui A W Robards

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      Cells of the resting vascular cambium ofFagus sylvatica contain vesiculate smooth endoplasmic reticulum, free ribosomes, oil droplets, protein bodies and few or no vacuoles. Active cambial cells and young differentiating xylem elements are highly vacuolate and contain rough cisternal ER and polyribosomes. The Golgi apparatus is active in the production of vesicles and particles of about 25 nm diameter are found just outside the plasmalemma of differentiating xylem cells. The possibility that vacuoles are formed by the progressive dissolution of stored proteins during the onset of cambial activity, and that protein bodies are formed by deposition of storage products in vacuoles, is confirmed.

    • Ontogeny of stomata in some Nymphaeaceae

      Parveen Farooqui

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      In all the three species studied stomata are mostly confined to the upper epidermis but a few occur on the lower surface as well. Development is of the perigenous type. The reduction in number of cell divisions in and around the stomata in parasitic and aquatic plants is discussed.

    • Ontogeny of the tricytic stoma—Variations and modifications

      Parveen Farooqui

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      The tricytic stoma is studied on the basis of published literature and illustrations. It is found that it may be formed in a variety of ways. These are classified and reviewed.

    • Ontogeny of the Anomocytic stoma—variations and modifications

      Parveen Farooqui

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      Recent studies on the ontogeny of stomata in a number of plants have shown that the anomocytic stoma is not always perigenous or haplocheilic in origin as was previously believed but may be formed in a variety of ways. These are classified and reviewed in the present paper. The need to investigate ontogeny of this type of stoma in more plant groups is emphasized.

    • Ontogeny of the paracytic stoma: Variations and modifications

      Parveen Farooqui

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      It was generally believed that the topography of the cells surrounding the guard cells in the mature condition indicate their mode of development. However, it has now been established that more than one ontogenetic type may correspond to a single mature type, or it may lead to the development of varied stomatal types. The paracytic stoma was studied from this viewpoint. It was found that it may be formed through one of at least eight different modes. These are classified and reviewed. The need to undertake studies on the ontogeny of this type of stoma in various groups of plants has been emphasized.

    • Cork-warts inEucalyptus species

      Parveen Farooqui

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      Four different types of cork-warts, the ordinary cork-warts, the d-scars, wound cork and trichome scars have been described fromE. citriodora andE. torellina. The differences between them are discussed.

    • Use of cuticular studies in distinguishing species ofDalbergia

      Parveen Farooqui N Venkatasubramanian V K Nallasamy

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      Cuticular characters were studied in 3 species ofDalbergia. In the closely related and often confusing speciesDalbergia latifolia andDalbergia sissoides, it has been found that the two species can be distinguished on the basis of cuticular characters. Epidermal cells of the lower epidermis ofDalbergia latifolia are prominantly papillate while those ofDalbergia sissoides are non-papillate. Some other interesting characters of the epidermis are also described.

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