Abstract:
The structure of stomata and trichomes in 18 species of family Caesalpiniaceae are described. The trichomes are usually non glandular in nature and are of two types. (1) Unicellular, uniseriate (2) with a rounded thick walled base and a terminal unicellular body which may be blunt or sharply pointed towards the tip. Capitate, clavate, or cylindric hairs have also been observed, which may be glandular or aglandular. Leaflets are amphistomatic in all species except Bauhinia alba, B. purpurea. B. variegata. Caesalpinia bonduc, C. pulcherrimm, Cassia fistula, C. glauca C. javanica, and Haematoxylum campechianum in which they are hypostomatic. Exclusively paracytic stomata have been observed in most of the species of genus Bauhinia, Cassia, Delonix regia, Haematoylum campechianum and Tamarindus indica. In the rest of the species studied stomata are either of more than one type or of anomocytic type only. Inspite of all this diversity the most frequent type in this family is paracytic. Anisocytic stomata in all cases are derived from paracytic one by the formation of transverse or oblique wall in subsidiary cell. A study of literature about the development of stomata in the allied families shows that development of a paracytic stomata may be mesogenous or masoperigenous, that of stomata with one subsidiary cell mesoperigenous but anomocytic stomata are ontogenetically perigenous.
Page(s):
65-80
DOI:
DOI not available
Published:
Journal: Biologia, Volume: 32, Issue: 1, Year: 1986