Leaf anatomy and morphology of Agave L. (Agavaceae) under greenhouse culture
N. Nuzhyna, M. Gaydarzhy
Educational and Scientific Centre “Institute of Biology” of Taras Shevchenko National University of Kyiv
1, Symon Petlura St., Kyiv 01032, Ukraine
The comparative characteristics of anatomical and morphological structure of leaves and the correlation between morphometric and quantitative indicators in 9 species of Agave L. from two subgenera have been given: subgenus Littaea: Agave attenuata, A. filifera, A. geminiflora, A. mitis; subgenus Agave: A. americana, A. fourcroydes, A. sisalana, A. vivipara, A. stricta. Within the genus there are several types of epidermal cells: thin cuticle and papillae in A. attenuata, A. mitis and A. sisalana; goblet shape epidermal cells in A. geminiflora, A. fourcroydes and A. filifera; arch shape outer cell wall with a thick cuticle in A. americana, A. stricta, A. vivipara. This outer epidermal wall structure can serve as an additional taxonomic criterion for distinguishing A. sisalana from A. americana and A. vivipara. For the first time it was found a negative correlation between the stomata width and size of leaf, and positive correlation – between stomata width, number of leaves in the rosette and degree of phloem lignification. Considered morphological and anatomical parameters of leaves can not be used as diagnostic features at the subgenus level.
Keywords: Agave L., leaf anatomy, leaf morphology