MORPHOLOGY AND MICROMORPHOLOGY OF THE GENUS FRAXINUS L. IN IRAN
Publish place: The Iranian Journal of Botany، Vol: 20، Issue: 2
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJB-20-2_009
تاریخ نمایه سازی: 28 آذر 1402
Abstract:
Fraxinus L. is one of the ۲۴ genera in Oleaceae family and comprises ۴۳ species that are distributed in northern hemisphere. Two species: F. excelsior L. and F. angustifolia Vahl. are reported from Iran. These species are very similar on the basis of morphological characteristics which make their identification difficult. In order to overcome the ambiguity of these two species and their subspecific ranks, morphological and micromorphological traits of the species in ۵۵ populations were studied. Forty nine qualitative and quantitative morphological characteristics were studied. Phenetic analysis was carried out using SPSS ver. ۱۶ software and phenogram of the species considering morphological characters were plotted. Furthermore, PCA analysis was carried out and the most variable characters were determined. Factor analysis revealed the color of adaxial and abaxial surfaces of leaflets, color of winter buds, type of inflorescence, shape of fruit and its tip, and margin of leaflets are the most effective separating characters. According to descriptive analysis, three factors including the type of inflorescence, color of winter bud and shape of the margin serration of the leaflets are the most important ones. Micromorphological studies using scanning electron microscope, revealed two types of trichomes: acicular and capitate. Pollen grains in all specimens are monad and tricolpate. An identification key was prepared using morphological and micromorphological features.
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Authors
Mona Kaveh
Department of Biology, Faculty of Science, Alzahra University, Tehran
Akhtar Tavassoli
Department of Biology, Faculty of Science, Alzahra University, Tehran
Rahman Azadi
Research Institute of Forests & Rangelands, Tehran
Farshid Memariani
Department of Botany, Research Institute for Plant Sciences, Ferdowsi University of Mashhad
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