Variability amongThymelaea hirsuta (L.)Endl. populations in Egypt |
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Authors: | Kamal Shaltout Nicole Denelle Pierre Jacquard Francois Romane |
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Affiliation: | 1. Botany Department, Faculty of Science, Tanta University, Tanta, Egypt 2. Centre Louis Emberger, C.N.R.S., B.P. 5051, 34033, Montpellier Cedex, France
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Abstract: | The present study depicts the presence of a gradient in the morphological characters ofThymelaea hirsuta (L.)Endl. leaves which correlated with the environmental gradient prevailing in the Western Mediterranean region of Egypt. The less arid and more calcareous habitats harbour individuals with obtuse and gentle curved leaf apices and gentle involute leaf margins. With the increase of aridity and decrease of CaCO3, the leaf apices become acute and strongly curved, and the leaf margins become strongly involuted. Significant variations in seed weight, seedling emergence and viability of seed embryos inT. hirsuta, in relation to habitat types, are also shown and discussed. |
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