BOTANICAL STUDIES ON SOME GENERA OF MIMOSACEAE AND CAESALPINIACEAE I- MORPHOLOGICAL AND ULTRASTRUCTURAL FEATURES OF LEAVES:

Youssef,, Fadia A.; Khattab, A. M.; El—Kobisy, O. S.; Emara, Kh. S.

doi:10.21608/jpp.2006.236421

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	BOTANICAL STUDIES ON SOME GENERA OF MIMOSACEAE AND CAESALPINIACEAE I- MORPHOLOGICAL AND ULTRASTRUCTURAL FEATURES OF LEAVES:
Article 7, Volume 31, Issue 12, December 2006, Page 7617-7627 PDF (174.75 K)
Document Type: Original Article
DOI: 10.21608/jpp.2006.236421
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Authors
Fadia A. Youssef,; A. M. Khattab; O. S. El—Kobisy; Kh. S. Emara
Agricultural Botany Department, Fac. of Agric. Cairo Univ., Giza, Egypt.
Abstract
Taxonomic relationships between 4 species belong to 3 genera of two fabaceous fami’ies; namely? Mimosaceae and Caesalpiniaceae were ¡dentified. These species were; Leucaena Ieucocephala, Bauhinia varie gata, Bauhinia alba and Delonix regia. The objective of this study was to through the light on the taxonomic relationships between these species by using leaf morphological characters and the lamina surface characteristics (stomata and trichomes) under the Scanning Electron Microscope (SEM). Single Linkage Clustering technique was applied to analyze these characters to represent the relationships between the studied species. Morphological description results indicated that both species of genus Bauhinia and the species of genus Delonix are more close to each other in most of the studied characters. The SEM on lamina surface is supporting the obtained morphological results. A key includes morphological and SEM features studied was proposed. INTRODUCTION Bentham and Hooker, 1862 and Englar and Pranti, 1931(c.a. Shukia and Misra, 2001) and many other taxonomists considered Caesalpinioideae. Mimosoideae and Papilionoídeae as 3 sub-families of the family Leguminosae under order Rosales. While, these sub-families are treated as distinct families by many botanists (Heywood, 1993 and Pandey, 2004) except those who cling to tradition. The authors are accepting the last point of view as separate families based on vast diversity of fruits and certain other characters. Hutchinson, 1969 (c.a. Pandey, 2001) has treated the 3 sub- families under order Leguminaes. Recently, the order Fabales includes 3 families; namely, Fabaceae, Mimosaceae and Caesafpiniaceae (Pandey, 2004). The family Mimosaceae (Acacia family), the smallest family of order Fabales; mainly tropical and sub tropical trees and shrubs. It includes approximately 40 genera and 500-2000 species (Rendle, 1959). Leaves are often bipinnate and flowers regular with petals valvate in floral bud, with 10 or more stamens. Mimosaceae can be separated into 8 tribes on the basis primarily of the leaves nature and the number and degree of the stamens fusion (Willis, 1973). In addition, some classified it into 5 groups based on pollen type (Heywood, 1993). The family Caesalpiniaceae (Cassia family) mainly tropical and subtropical trees and shrubs. The family comprised of 133 genera and 2500m 3000 species (Rend le, 1959). Leaves are usually pinnate, but some times bipinnate. Flowers are usually more or less irregular with lateral petals (wings) covering the standard inside the floral bud, and with 10 or fewer


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