Thai Journal of Botany
     
Article's details
 
Title: Taxonomic value of pollen micromorphological characters of Urticaceae in Thailand
ชื่อบทความ: -
Author: NATTHAWUT TRIYUTTHACHAI1, PRAMOTE TRIBOUN2, SAKUNTALA NINKAEW1 & PIMWADEE PORNPONGRUNGRUENG1,*
ชื่อผู้แต่ง : -
Pages: 107 - 119
Year: 2565
Year No.: 14
Volume: 2   Show All Articles
Abstract:

          Pollen morphology of 13 genera and 26 species of Urticaceae in Thailand were investigated in order to examine the taxonomic significance of the pollen morphological characters for this family. The pollen grains were acetolyzed and investigated under the light and scanning electron microscopes. The results show that the general pollen characters of Urticaceae are monad and radially symmetrical. The size of pollen grains is small (1016 μm) or minute (79 μm). The pollen types are 23-porategrains, pore with or without annulus. The pollen shape isoblate spheroidal, suboblate, prolate spheroidal and subprolate. The exine sculpturing are granulate, microbaculate, microechinate and microverrucatemicroechinate. The presence of annulus around the pore is the diagnostic character of the Elatostema group (Elatostema, Pellionia and Procris).The pollen morphological characters can be used for the identifi cation of only some genera of Thai Urticaceae and are helpful for distinguishing some species. Thus, the taxonomic implication of pollen morphology for Urticaceae is limited.

download count: 59
 



    right-buttom
     
 

There are 2280 online

All rights reserved The Botanical Garden Organization,Thailand