Abstract:
The comparative studies of palyno-anatomical traits are mostly used in resolving taxonomic problems at various taxonomic ranks to define species boundaries for long in the systematics and evolution. Therefore, this study aims to provide new and useful information regarding the extent of pollen and foliar epidermal anatomical diversity among the Asteraceae, Euphorbiaceae and Fabaceae taxa and thus to contribute a better understanding of the taxonomy of these three families by using both light (LM) and scanning electron microscopy (SEM). First, we analyzed the pollen morphology of the Asteraceae taxa that belonged to three subfamilies Asteroideae having eight tribes, Cichorioideae and Vernonioideae each having one tribe. Second, we analyzed the leaf epidermal traits of the Asteraceae taxa. Third, we studied the pollen morphology of the family Euphorbiaceae. Fourth, we studied the foliar epidermal anatomy of the family Euphorbiaceae which is one of the most taxonomically complex and diverse family among the other angiosperm groups. Fifth, we documented the pollen morphology of subfamily Papilionoideae which is also one of the taxonomically complex subfamily with high economic and medicinal potential. Sixth we presented the pollen micro-morphology of some Caesalpinioideae species sampled from different geographical regions of Hainan Island. Seventh, we analyzed the pollen morphology of subfamily Mimosoideae which is one of the taxonomically complex subfamily of Fabaceae. In conclusion, our results showed that palyno-anatomical characterization has a significant taxonomic potential to identify and define species boundaries within Asteraceae, Euphorbiaceae and Fabaceae at various taxonomic ranks. These features collectively can be used as an additional tool for regrouping taxa within these families. This comparative study can support and strengthen the taxonomy of these families and fill the palyno-anatomical gap of these taxa in Hainan Island and will contribute to future systematic studies. Thus the comparative palynoanatomical traits are taxonomically significant in understanding the relationship between and within species. Together, these traits are useful for identification, discrimination and to define species boundaries at various levels. Our study will provide bases for future studies to strengthen the systematic of these families and will also contribute to the currently limited literature on the comparative palyno-antomical traits diversity worldwide.
Page(s):
28-28
DOI:
DOI not available
Published:
Journal: Abstract Book on Second International Conference on Recent Approaches in Plant Sciences (RAPS-23) 4-5 May 2023 , Volume: 0, Issue: 0, Year: 2023
Keywords:
Pollen morphology
,
Asteraceae
,
Statistical analysis
,
Euphorbiaceae
,
Fabaceae
,
foliar epidermal anatomy
,
taxonomic relevance
,
light and scanning electron microscopy