A Cytogenetic Review of Chromosomal Diversity and Karyotype Variation in Endemic Plants of El-Jabal El-Akhdar, Libya
DOI:
https://doi.org/10.37375/vqpjkz81Keywords:
plant endemism, chromosome number, karyotype variation, ploidy level, satellite chromosomesAbstract
The El-Jabal El-Akhdar region in northeastern Libya constitutes one of the most important centers of plant endemism within the country; however, cytogenetic information on its flora remains scarce. This review compiles available data on chromosome numbers and karyotype characteristics for 61 endemic taxa (54 species and 7 subspecies) belonging to 48 genera and 28 families, based on previously published studies and chromosme information documented in IPCN database. Somatic chromosome numbers have been reported for only (17/61≈27.87%) of these taxa, varying from 2n = 8 to 2n = 96, with diploidy representing the most common ploidy level (14.75%). Available karyotype studies indicate considerable variation in ploidy levels, karyotype symmetry and asymmetry, chromosome size, and the occurrence of satellite chromosomes. Marked chromosomal differences among closely related species highlight the value of karyotype data in plant taxonomy. Nevertheless, the majority of endemic taxa remain cytogenetically unexplored, highlighting the urgent need for comprehensive cytogenetic investigations to clarify evolutionary relationships and to support effective conservation strategies.
References
Adeigbe, O.O., Omoloye, A.A., Aliyu, O.M., Adewale, B.D., & Oyewole, S.O. (2013). Karyomorphotypic variation in Eriospermum abyssinicum Baker. African Journal of Biotechnology,12(10),1010-1015. DOI: 10.5897/AJB12.1460
Ali, S.I., & Jafri, S.M.H. (Eds.). (1976-1989). Flora of Libya (Vol. 1-147). Department of Botany, Al-Faateh University, Tripoli, Libya.
Al-Sodany, Y. M., Shehata, M.N., & Shaltout, K.H. (2003). Vegetation along an elevation gradient in El-Jabal El-Akhdar, Libya. Ecologia Mediterranea, 29(2),125-138. DOI: 10.3406/ecmed.2003.1547
Bartolo, G., Brullo, S., Pavone, P., & Terrasi, M.C. (1984). Cytotaxonomical notes on some "Liliaceae" of N. Cyrenaica.Webbia,38(1),601-622. DOI: 10.1080/00837792.1984.10670329
Boyce, P.C.(1989). A new classification of Arum with keys to the infra generic taxa. Kew Bulletin, 44(3),383-395. DOI:10.2307/4110359
Brullo, S., Guglielmo, A., Pavone, P., & Terrasi, M. N. (1990). Chromosome counts of flowering plants from N. Cyrenaica. Candollea, 45(1), 65-74.
Chiarugi, A. (1949). Saggio di una revision cito-sistematica della flora Italiana. I:II tetraploidismo della Bellevalia webbiana Parl. e il suo diritto di cittadinana nella flora Italiana. Caryologia, 1(3), 362–377. DOI:10.1080/00087114.1949.10797519
Dhar, U. (2002). Conservation implications of plant endemism in high-altitude Himalaya. Current Science,82(2),141-148.
Dobignard, A., & Chatelain, C. (2010-2013). Index Synonymique de la Flore D’Afrique du Nord (Vols. 1-5). Éditions Des Conservatoire et Jardin Botaniques.
El-Barasi, Y.M., & Saaed, M.B. (2013). Threats to plant diversity in the north eastern part of Libya (El-Jabal El-Akhdar and Marmarica Plateau). Journal of Environmental Science & Engineering, 2:41-58. DOI:10.17265/2162-5298/2013.01.006
El-Darier, S. M., & El-Mogaspi, F. M. (2009). Ethnobotany and relative importance of some endemic plant species at El-Jabal El-Akhdar region (Libya). World Journal of Agricultural Sciences, 5(3), 353-360.
Elshatshat, S. (2009). Biological conservation of the endemic Arbutus pavarii Pamp: Seed germination as attempt. International Journal of Human Geography and Environmental Studies, 1(1), 20-22.
Favarger, C., & Contandriopoulus, J. (1961). Essai sur L'endémisme. Bulletin de la Société Botanique Suisse, 71, 384-408. DOI:10.2307/1219531
Garbari, F. (1975). The genus Allium in Italy. V. Allium subgen. Chamaeprason (F. Hermann), status novus. Taxon,24,541-542. DOI:10.1080/00378941.1968.10838582
Guittonneau, G., & Le Houérou, H. N. (1968). Deux nouvelles espéces du genre Erodium L'Hérit. Découvertes en Libye. Bulletin de la Société Botanique de France, 115(7-8), 591-599. DOI:10.1016/j.revpalbo.2024.105272
Hunt, C., McClung, L.C., Edwards, L., & el-Rishi, H. (2024). Pollen-vegetation-rainfall relationships in the Gebel al-Akhdar, Northeast Libya. Review of Palaeobotany and Palynology, 334(6), 105272. DOI:10.1007/978-94-009-9156-9
IPCN. (2024). Index to Plant Chromosome Numbers. Missouri Botanical Garden. Retrieved October 26, 2024, from http://www.tropicos.org/Project/IPCN/
Itswaart, J.H. (1980). A taxonomic revision of the genus Origanum (Labiatae). Netherlands: Leiden University Press. DOI:10.1002/9781444390001
Ladle, R.J., & Whittaker, R.J. (2011). Conservation biogeography. Wiley-Blackwell. DOI:10.1038/nature04291
Lamoreux, J. F., Morrison, J. C., Ricketts, T.H., Olson, D.M, Dinerstein, E., McKnight, M. W., & Shugart, H.H. (2006). Global tests of biodiversity concordance and the importance of endemism. Nature, 440, 212-214. DOI:10.1201/9780429469800-5
Legro, R. A. H.(1959). The cytological background of Cyclamen breeding. Mededelingen van de Landbouwhogeschool te Wageningen, Netherland, 59(8), 1-51.
Maire, R.(1958). Flore de I'Afrique du Nord (Vol. 5, pp. 284-298). Paris.
Mahklouf, H.M., & Etayeb, S.K. (2018). Biodiversity in Libya: Selected countries in Africa. Global Biodiversity, 3(5), 113-132. DOI:10.2307/4119780
Marchant, C.J. (1973). Chromosome variation in Araceae: V. Acoreae to Lasieae. Kew Bulletin, 28 (2), 199-210. DOI:10.5735/085.057.0120
Martin,E., Dirmenci,T., Arabaci, T., Yazici, T., & Özcan, T. (2020). Karyotype studies on the genus Origanum L.(Lamiaceae) species and some hybrids defining homoploidy. Caryologia, 73(2), 127-143. DOI:10.1080/00087114.2014.998526
Mirzaghaderi, G., & Marzangi, K. (2015). IdeoKar: An ideogram constructing and karyotype analyzing software. Caryologia, 68(1), 31-35. DOI:10.1007/978-3-642-20992-5_1
Mittermeier, R. A., Turner, W. R., Larsen, F.W., Brooks, T.M. & Gascon, C. 2011. Global biodiversity conservation: The critical role of hotspots, Biodiversity hotspots. In: achos, F., Habel, J. (eds.) Biodiversity hotspots (pp.3-22). Springer, Berlin, Heidelberg. DOI:10.1007/978-3-642-20992-5_1
Mossa, L., & Scrugli, A.E. (1970). Osservazioni cariologiche in Allium chamaemoly L. Morisia, 2, 53-62.
Myers, N., Mittermeier, R. A., Mittermeier, C. G., da Fonseca, G. A. B. & Kent, J. 2000. Biodiversity hotspots for conservation priorities. Nature, 403(6772), 853-858. DOI:10.1038/35002501
Peruzzi, L., Leitch, I.J., & Caparelli ,K.F. (2009). Chromosome diversity and evolution in Liliaceae. Annals of Botany, 103, 459–475. DOI:10.1093/aob/mcn230
POWO. (2024). Plants of the World Online | Kew Science. Facilitated by the Royal Botanic Gardens,Kew.RetrievedOctober26,2024,from https://powo.science.kew.org/
Qaiser, M., & El-Gadi, A. (1984). A critical analysis of the flora of Libya. Libyan Science Jour¬nal, 13, 31-40.
Radford, E.A., Catullo, G., & de Montmollin, B. (Eds.). (2011). Important plant areas of the south and east Mediterranean region: priority sites for conservation. IUCN, Gland, Switzerland and Malaga, Spain.
Rivero, R., Sessa, E.B., & Ferguson, R.Z. (2019). EyeChrom and CCDBcurator: Visualizing chromosome count data from plants. Applications in Plant Sciences, 7(1):1-5. DOI:10.1002/aps3.1207
Sharaf, A.T.(1971). Geography of Libya. Monshaat Al-Maaref, Alexandria, Egypt.
Siljak-Yakovlev, S., & Peruzzi, L. (2012). Cytogenetic characterization of endemics: Past and future. Plant Biosystems,146(3),694-702. DOI:10.1080/11263504.2012.716796
Stebbins, G. L., & Major, J. (1965). Endemism and speciation in the California flora. Ecological Monographs, 35(1), 1-35.
Sun, W.G., Sun, H., & Li, Z.M. (2019). Chromosome data mining and its application in plant diversity research. Plant Science Journal, 37(2), 260-269. DOI: 10.11913/PSJ.2095-0837.2019.20260
Thor, G., & Nascimbene, J. (2010). An annotated checklist and bibliography of lichens and lichenicolous fungi of Libya. Cryptogamie Mycologie, 31(1), 67-95.
Van de Peer, Y., Mizrachi, E. & Marchal, K.(2017). The evolutionary significance of polyploidy. Nature Reviews Genetics, 18:411–424. DOI: 10.1038/nrg.2017.26
Villa, S., Montagna, M., & Pierce, S. (2022). Endemism in recently diverged angiosperms is associated with polyploidy. Plant Ecology, 223(4), 479-492. DOI:10.1007/s11258-022-01223-y
Wendel, J.F.(2015). The wondrous cycles of polyploidy in plants. American Journal of Botany, 102(11),1753-1756. DOI:10.3732/ajb.1500320
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