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Assessment of the modes of pollen dispersal of Vernonia amygdalina Del. and Vernonia calvoana Hook

Assessment of the modes of pollen dispersal of Vernonia amygdalina Del. and Vernonia calvoana Hook

Authors :
Zapfack Louis
Ntsomboh-Ntsefong Godswill
Youmbi Emmanuel
Temegne Nono Carine
Nguimkeng Gaintse Eric Dumas
Source :
African Journal of Plant Science. 11:362-368
Publication Year :
2017
Publisher :
Academic Journals, 2017.

Abstract

The study of pollen dispersal and mode of fertilization of Vernonia amygdalina and Vernonia calvoana is a prerequisite to the understanding of genetic diversity and elaboration of improvement programs for the Vernonia genus. In this study, precise experimental designs were made for morphological and biological observations on Vernonia species capitulum in order to assess the distinctive effects of each of the three possible pollen transportation agents (insects, wind and rain water) on pollination. Results obtained show that the exclusive mode of pollen dispersal is entomophilous. Even though allogamy and autogamy are observed as two possible modes of fertilization in Vernonia spp., some arguments tend to favour allogamy. However, there is no clear cut position on the issue, hence the need for confirmation by further experimentation in controlled pollination. This study paves the way for the establishment of a genetic improvement program for this genus based on the results on pollen dispersal. Key words: Vernonia species, allogamy, autogamy, pollination agent.

Details

ISSN :
19960824
Volume :
11
Database :
OpenAIRE
Journal :
African Journal of Plant Science
Accession number :
edsair.doi...........1cbdfaca7222af84406d5e65033ed935
Full Text :
https://doi.org/10.5897/ajps2017.1550