COMPARATIVE STUDIES ON THE ANATOMICAL STRUCTURE OF STEM AND LEAF OF THREE GENERA OF LAMIACEA | ||
| Journal of Plant Production | ||
| Article 18, Volume 25, Issue 6, June 2000, Pages 3335-3348 PDF (696.22 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2000.259126 | ||
| Authors | ||
| M. U. El Sgai,; A. M. Sabbour | ||
| Dept. of Agricultural Botany, Faculty of Agriculture, Cairo University | ||
| Abstract | ||
| Plants of marjoram, basil and sage all of the family Lamiacea were grown during 1998/ 99 season for studying their anatomical features. Results indicated that stem primary structure in the three genera as the stem layout is quadrangular . Cortex showed cells of different types in corners and edges. The procambial ring is well defined with a considerable number of well differentiated and lignified xylem vessels. The phloem is embedded in a sheath –like ring of small polygonal cells. This sheath has smaller cells as compared with those of the contacting cortical layers. The pith is relatively wide as compared to whole stem diameter in marjoram and sage. It comprises round to oval cells with variable size. Stem secondary structure proved that average thickness of the cortex of the three studied genera is relatively thicker. A complete cylinder of well lignified vascular vessels are found in the three genera. As well as, leaf anatomy of the three studied genera shows some differences in their components. Stomata in the three studied genera are anomocytic which comprises no subsidiary cells. Stomata number and size are varied between the upper and lower epidermis of leaf blade and between the three studied genera. Non-glandular uniseriate hairs of varying length with swollen basal cells are commonly found. Glandular hairs are found in the three studied genera. Though, both marjoram and basil showed glandular heads of 4 cells and short stalks, while heads of 8 cells with long stalks are found in sage. | ||
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