| Abstract: |
SUMMARYThe seed morphological characters and protein electrophoretic profiles of seed 15 taxa belonging to the Mimosoideae were investigated to reveal further seed characters which may be useful in further distinction and delimitation of the examined taxa.The different seed morphological attributes of the studied taxa are presented in the form of commulative tables, photomicrograp and plates as well as photographic picture of seed protein electrophic profiles.An artifical key has been contrasted based on morphological surface scan characteric (lens character) of seeds of the studied taxa. In addition the data produced from seed protein electrophoretic profiles were treated by the numerical analysis.I) Seed Morphology:1. The shape of seed seems to be a reliable criterion for characterization of some of the examined taxa at both the species and infra specific level.Although, the size and colour of seeds are frequently inconsistent attributes, and thus they are not among the valuable taxonomic ones. They here stand diagnostic form some the taxa investigated.2. The areole which represent an area on each face bounded by crack in the testa (the pleurogram) is recorded in seeds of all the taxa examined.3. The presence of three apertures (the micropyle, hilum and lens) altogether at one end of the seed is a common feature among the taxa investigated, however the lens is not detected in seeds of Acacia tortilis subsp tortilis.a) The micropyle shape may be useful in the recognition of Albizia julibrissin from A. Lebbeck.b) Also in the delimitation of the two examined species of Enterolobium: E. contortisiliqum, E. cyclocarpum (Deltoid slit with thickened rim) from all the remaining as they retain a similar shape of micropyle.c) In addition, the micropyle position appear, to be diagnostic for Faidherbia albida and also for the recognition of Prosopis farcta from P. julifora.4. The hilum shape seems to be distinctive for Acacia farnesiana (conspicuous), Faidherbia albdie (Elongate with funicular rement).5. The lens characteristics proved to be diagnostic taxonomic attribute. These characters are position in relation to hilum, lens level of insertion and lens shape. The combination of such characteristics together may be very useful in the delimitation ofa) An atrifical key based on lens characters are constructed.b) The lens when detected is invariable located behind the hilum and is separated from the micrpyle by the hilum. However a pseudolens is also detected to be located next to the micropyle in Acacia tortilis, subsp tortilis, Albizia julibrissin and Inga du6. The spermoderm as viewed under SEM revealed seven basic sculpturing patterns namely: ill-defined, irregularly foveolate, reticulate-foveolate, rugulate, tuberculate, irregularly papillose. Fait polygonal discoid plates covered with microstriations. TheII) Seed Protein Profiles and Numerical Analyzing:1. By using seed protein patterns it showed the similarity matrix between the studied taxa with facilitate the taxonomic relationship between taxa.2. The results of numerical analysis of seed protein patterns reveled a dendogram which shown the interrelations between the examined taxa.3. The numerical analysis divided the studied taxa into eight groups six cultures, three subseries and two series.4. The resulted taxonomic treatment based on numerical analysis is compared with other taxonomic treatment these treatment is agreed with opionin of Pohill Raven (1981).
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