Characteristics of the Stem-Leaf Transitional Zone in Some Species of Caesalpinioideae (Leguminosae)

The vascular supply of the proximal, middle, and distal parts of the petiole were studied in 11 caesalpinioid species with the aim of documenting any changes in vascular anatomy that occurred within and between the petioles. The characters that proved to be taxonomically useful include vascular trace shape, pericyclic fibre forms, number of abaxial and adaxial vascular bundles, number and relative position of secondary vascular bundles, accessory vascular bundle status, the tendency of abaxial vascular bundles to divide, distribution of sclerenchyma, distribution of cluster crystals, and type of petiole trichomes. There is variation between studied species in the number of abaxial, adaxial, and secondary bundles, as seen in transection of the petiole. There are also differences between leaf trace structure of the proximal, middle, and distal regions of the petioles within each examined species. Senna italica Mill. and Bauhinia variegata L. show an abnormality in their leaf trace structure, having accessory bundles (concentric bundles) in the core of the trace. This study supports the moving of Ceratonia L. from the tribe Cassieae to the tribe Detarieae. Most of the characters give valuable taxonomic evidence reliable for delimiting the species investigated (especially between Cassia L. and Senna (Cav.) H.S.Irwin & Barneby) at the generic and specific levels, as well as their phylogenetic relationships.

Anahtar Kelimeler:

Abaxial, adaxial, accessory, secondary vascular bundles, indumentum, pericyclic fibre

Characteristics of the Stem-Leaf Transitional Zone in Some Species of Caesalpinioideae (Leguminosae)

Keywords:

Abaxial, adaxial, accessory, secondary vascular bundles, indumentum, pericyclic fibre,

PDF

___

Agbaywa IO & Ndukwu BC (2004). The value of morpho-anatomical features in the systematic of Cucurbita species in Nigeria. Afr J Biotechnol 3: 541-546.
Armstrong JE (1985). The delimitation of Bignoniaceae and Scrophuloriaceae based on floral anatomy and the placement of problem genera. Am J Bot 72: 755-766.
Bentham G (1871). Revision of the genus Cassia. Tran Linn Soc 27: 503-591.
Boughton HV (1986). Phyllodes structure, taxonomy and distribution in Australian Acacias. Aust J Bot 34: 663-74.
Boulos L (1999). Flora of Egypt vol. 1 (Azollaceae-Oxalidaceae) All Hadra publishing, Cairo, Egypt: 362.
Briggs BG & Johnson LAS (1979). Evolution in the Myrtaceae evidence from inflorescence structure. Proc Linn Soc NSW 7: 157-256.
Bruneau AF, Forest PS, Herendeen, BB, Klitgaard & Lewis GP (2001). Phylogenetic relationships in the Caesalpinioideae (Leguminosae) as inferred from chloroplast intron sequences. Syst Bot 26:: 487- 514.
Ennos AI, Spatz Hch. & Speck TT (2000). The function morphology of the petiole of the banana, Musa textilis. J Exp Bot 51: 2085- 2093.
Fernando E & Quinn CJ (1992). Pericarp anatomy and systematic of Simarousbaceae sensu lato. Aust J Bot 40: 263-85.
Herendeen PS, Bruneau GP & Lewis GP (2003). Floral morphology in caesalpinioid legumes: Testing the morphology of the “Umtiza clade”. Intern J Plant Sci 164: 394-407.
Hussein IF, Khalifa SFl, Ghareb A & Fawzy N (2002a). Taxonomic criterion of the characteristic features in seeds of some selected species of caesalpinioids. Egypt J Biotechnol 12: 280-298.
Hussein IF, Khalifa SFl, Ghareb A & Fawzy N (2002b). Taxonomic importance of seed characteristics of some species of Cassia and Cenna. Caesalpinioideae. Egypt J Biotechnol 12: 248-265.
Lewis GP, Schrire B, Mackinder & Lock M (2005). Legumes of the world. Royal Botanical Gardens, Kew, UK: 591
Maria BG & Rodriigo (2003). Leaf anatomy of rubber tree clones. Sci Agric 60: 709-713.
Polhill RM & Raven PH (1981). Advances in legume Systematics vol. 2 part 1 & 2. Royal Botanical Gardens, Kew, UK.
Robbertse P (1973). The genus Acacia Miller in South Africa-6. Boissiera, 24a: 263-270.
Saquaro A (2005). Leaf morphology and anatomy of the ficus plant. Afr J Biotechnol 5: 331-346.
Seetharam YK & Kotresha K (1998). Foliar venation of some species of Bauhinia L. and Hardwickia binata Roxb. (Caesalpinioideae), Phytomorphology 48: 51-59.
Shaheen AM (1995). Morphological and cytogenetical variations in the ecological population of Acacia Mill in Egypt, Ph.D. Thesis, South Valley University, Aswan Faculty of Science, Egypt.
Shaheen AM (2002). Taxonomic importance of seed characters in native and naturalized species of Solanum. Taeckholmia 22: 131-141.
Shaheen AM (2004). Flora of Egyptian Nubia after High Dam construction. Proc of Third Intern Conf of Biol Sci Faculty of Science, Tanta University. Tanta, Egypt 3: 21-40.
Shaheen AM (2006). The value of vascular supply of the petiole trace characteristics in the systematic of some species of subfamily: Mimosoideae-Leguminosae. Assiut Univ J Bot 35: 193-213.
Stuessy FT (1990). Plant taxonomy. The Systematic Evolution of Comparative Data, Columbia University Presses. New York.
Tomlinson PB (1982). Chance and design in the construction of plants. Acta Biothear 31A: 162-139.
Tomlinson PB (1984). Vegetation morphology. Some enigmas in relation to some plant systematize. In: (Eds.V.H. Heywood and D.M. Mooie). Current Concepts in Plant Taxonomy: 49-66. Academic Press: London.