الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 166 |  |  |
| | | from | 166 | | |
Abstract
The present study provides a detailed description of the floristic features, ecological features and economic potentialities of four halophytes species of family Chenopodiaceae namely, Atriplex halimus L., Atriplex lindleyi Moq., Atriplex protulacoids L. and Atriplex semibaccata R.Br. growing naturally in the Deltaic Mediterranean coastal land of Egypt and, it aims at the following objectives: Recognition of the habitat type of the selected species of family Chenopodiaceae in the Deltaic Mediterranean coastal land of Egypt. Study the floristic features including: record of species, life-span, life-form spectra and floristic categories of the species in the study area to detect the taxonomic and phytogeographical significance of its floristic components. Quantitative analysis of vegetation structure of the communities associated with the selected species in the habitat type in terms of spatial variations in abundance using multivariate analysis (classification and ordination). Evaluation of the economic potentialities of the selected four halophytes species of family Chenopodiaceae growing naturally in the study area by studying: phytochemical analysis, allelopathic potentiality, antimicrobial and antioxidant activity. The area chosen for the present study is located in the northern part of the Nile Delta region of Egypt which covers the northern borders of three Governorates namely: Damietta, El-Dakahlia, and Kafr El-Sheikh. The natural plant wealth of this area was composed of 92 species belonging to 73 genera and related to 24 families. Out of these families, Poaceae, Asteraceae, Chenopodiaceae, Fabaceae and Brassicaceae are considered the major families as they contribute collectively about 61.95% of the total recorded species. This indicated that, these five families are leading taxa and constitute the major bulk of the flora of the study area. The economic potentialities of the four halophytes species of family Chenopodiaceae which are growing naturally in the study area have been studied. Moisture content, dry matter, total ash, crude lipid, crude fiber, total nitrogen, crude protein, total soluble sugar, glucose, sucrose and total carbohydrates have been estimated in the shoot of four studied plants. On the other hand, the elementary analysis (macro and microelements) were also determined in all investigated plants. The quantitative determination of the secondary chemical constituents (tannins, saponins, flavonoids, alkaloids and phenolics) were determined.