AJPS  Vol.6 No.9 , June 2015
Macro and Micromorphological Studies on Seven Species of Heliotropium L. (Boraginaceae Juss.) in South West of Saudi Arabia
Abstract: Genus Heliotropium L. (Heliotropiaceae) in south west of Saudi Arabia has been studied; seven species of H. arbainense Fresen, H. longiflorum (D.C.) Jauber & Spach, H. petrocarpum Hockst & Steud, H. strigosium Willd, H. zeylanicum Lam., H. jizanense Al-Turki and H. lasiocarpum Fisch were collected, recognized, typed and nomenclatured. The most valuable characters were those of macro and distinct micromorphological data such as stomata, hairs, pollen grains and stem anatomy. Light microscopy has been used in these studies. From the obtained results, trichomes and pollen grains data in addition to stem anatomy indicated good taxonomic tools to differentiate between species of this genus. Different traditional measurements were strikingly also helpful for the discrimination of species. H. longiflorum was characterized by distinctive data such as prominent anatomical information, P/E (1.8 μm) in addition to presence of spindle hair which in turn can be separated as a taxonomic level. Also, the results revealed a complete affinity between the two species of H. jizanense and H. lasiocarpum. An artificial key is provided for the differentiation between the studied species.
Cite this paper: Taha Kasem, W. (2015) Macro and Micromorphological Studies on Seven Species of Heliotropium L. (Boraginaceae Juss.) in South West of Saudi Arabia. American Journal of Plant Sciences, 6, 1370-1377. doi: 10.4236/ajps.2015.69136.

[1]   Chase, M.W. (1993) Phylogenetics of Seed Plants: An Analysis of Nucleotid Sequences from the Plastid Gene rbcL. Annals of the Missouri Botanical Garden, 80, 528-580.

[2]   Ferugson, D.M. (1999) Phylogenetic Analysis and Relationship in Hydro-Phyllaceae Based on ndhF Sequence Data. Systematic Botany, 23, 253-268.

[3]   Diane, N., Further, H. and Hilger, H. (2002) A Systematic Analysis of Heliotropium, Tournefortia, and Allied Taxa of the Heliotropiaceae (Boraginales) Based on ITS1 Sequences and Morphological Data. American Journal of Botany, 89, 287-295.

[4]   Olwey, A. (2014) Transcript of Biosystematics Studies of Genus Heliotropium L. (Boraginaceae). MSc Thesis, Department of Botany & Microbiology, Faculty of Science, Assiut University, Assiut.

[5]   Alfarhan, A., Al-Turky, T. and Basahy, A. (2005) Flora of Jazan Region. Final Report, Vol. 1-2, Supported by King Abdulaziz City for Science and Technology, 545.

[6]   Masrahi, Y.S. (2012) A Brief Illustrate to Wild Plants in Jazan Region. King Fahad Library, Jeddaha, 302.

[7]   Metcalf, C.R. and Chalk, L. (1950) Anatomy of the Dicotyledons Vol. II. Clarendon Press, Oxford, 1067-1074.

[8]   Mbagwu, F.N., Nwachukwu, C.U. and Okon, O. (2007) Comparative Leaf Epidermal Studies on Solanum macrocarpon and Solanum nigrum. Nature and Science, 5, 1-6.

[9]   Ayodele, A.E. and Zhou, Z.K. (2008) Scanning Electron Microscopy of Leaves in the West African Polygonaceae. Nigerian Journal of Botany, 21, 252-265.

[10]   Albert, S. and Sharma, B. (2013) Comparative Foliar Micromorphological Studies of Some Bauhinia (Legiminoseae) Species. Turkish Journal of Botany, 37, 278-281.

[11]   Mona, A. and Bukhary, N. (2013) Anatomical Study of Four Species of Heliotropium L. (Boraginaceae) from Saudi Arabia. African Journal of Plant Science, 7, 35-42.

[12]   Hoyam, O. and Maha, A. (2012) Leaf and Stem Anatomy of Five Species from the Genus Heliotropium L. (Boraginaceae) in Sudan. Journal of Chemical and Pharmaceutical Research, 4, 4575-4581.

[13]   Erdtman, G. (1952) Pollen Morphology and Plant Taxonomy—Angiosperms. Almqvist and Wiksell, Stockholm, 539 p.

[14]   Salisbury, E.J. (1927) On the Cause and Ecological Significance of Stomatal Frequency with Special Reference to the Woodland Flora. Philosophical Transactions of the Royal Society of London: Biological Sciences, 216, 1-65.

[15]   Johansen, O.A. (1940) Plant Microtechnique. McGraw-Hill Book Co., Inc., New York.

[16]   Hickey, L.J. and Wolf, J.A. (1975) The Basis of Angiosperm Phylogeny Vegetative Morphology. Annals of the Missouri Botanical Garden, 62, 538-589.

[17]   Ash, A., Ellis, B., Hickey, K., Johnson, P. and Wing, S. (1999) Manual of Leaf Architecture-Morphological Description and Categorization of Dicotyledonous and Net-Veined Monocotyledonous Angiosperms. Smithsonian an Institution, Washington DC.

[18]   Dasti, A.A., Bokhari, T.Z., Malik, S.A. and Akhtar, R. (2003) Epidermal Morphology in Some Members of Family Boraginaceae in Baluchistan. Asian Journal of Plant Sciences, 42, 42-47.

[19]   Qureshi, S.A. (1985) Studies on the Pollen Morphology of the Genus Heliotropium L. Pakistan Journal of Botany, 17, 107-114.