Palyno-taxonomic studies of some tree species of Fabaceae from Sajjan Niwas Bagh of Udaipur District, Rajasthan, India.

Abstract

Green corridors are the key elements of urban ecology. These corridors include both new inceptions and historical gardens. Udaipur the historically glorified city of Rajasthan state holds Sajjan Niwas Bagh is popularly known as gulab bagh as one of the rich urban biodiversity hotspot. It bears numerous tree species among which Bauhinia variegata, Cassia auriculata, Delonix regia and Erythrina indica of Fabaceae family can be cited for it’s outnumber. These tree species contribute allergenic composition of the area from January to May of the pollen calendar cycle, but their morphological and morphometric analysis scarcely hit the prevailing studies. The present study deals with pollen morphological observations, viability and germination. The morphometric observations were recorded by scanning electron microscopy and it shows that pollen grains of all the studied species differed in shape but except Erythrina indica they were tricolpate. Percent viability and percent germination of Bauhinia variegata and Delonix regia was nearly similar while in case of Cassia auriculata and Erythrina indica the percent germination was poor as compared to viability which was comparatively significant. A pollen kit like adhesive structures were observed in Bauhinia variegate and Cassia auriculata.