Structure Ontogeny of Stomata in some Polemoniales.
by Patel R. C., Inamdar J. A. (1971)
in Annals of Botany: Vol. 35, 389-409. –
The ontogeny and structure of stomata in 22 genera and 51 species of the Polemoniales are described.
Five main types of stomata noticed are: anisocytic, anomocytic, diacytic, paracytic, and stomata with a single subsidiary cell.
Three modes of stomatal development: syndetocheilic or mesogenous, haplocheilic or perigenous, and meso-perigenous or syndeto-haplocheilic are observed.
Abnormalities seen are: stomata with single guard cells, arrested development and contiguous stomata variously oriented. Contiguous stomata result from adjacently placed meristemoids or readjustment during maturation. Stomata with a single guard cell are formed as a result of degeneration of one of the guard cells before or after pore formation.
The stomatal apparatus varies in different organs of a plant in form, number, orientation and arrangement of the subsidiary and also the surrounding cells.
Three lines leading to Polemoniales, Boraginales, and Solanales are distinct.