Structure and Development of Stomata on the Vegetative and Floral Organs of Some Amaryllidaceae

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Abstract
The structure and development of stomata in 10 Amaryllidaceous members are described. The study is made on the leaves and floral organs of Amaryllis belladona, Crinum asiaticum, C. bulbispermum, C. latifolium, C. pratense, Pancratium sp., Polianthes tuberosa, and Zephyranthes atamsco, and on leaves of Agave sp. and Curculigo orchioides. In most of the organs of the different plants studied more than one type of stoma occur, even on the same surface. However, the stomata are largely anomocytic in Amaryllis, Crinum, Pancratium, Polianthes, and Zephyranthes, but they are tetracytic in Agave and Curculigo. An increase in the number of subsidiary cells in teracytic, tricytic, paracytic, and stomata with one subsidiary cell has been noted. It may be due to wall formation in the subsidiary cells or by the neighbouring perigenes assuming their form. The range of variation in different types of stomata in each organ has been studied. Abnormal features such as juxtaposed or superimposed contiguous stomata, connections between guard cells of nearby stomata, transformation of meristemoids into epidermal cells are observed. The development of different types of stomata in different organs of the same plant is perigenous. The systematic position of different genera is discussed in light of the present findings. A method of preparing epidermal imprints by the use of Depex, a mounting medium, and white of an egg is also described.

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