الفهرس Only 14 pages are availabe for public view
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Abstract
The present study was carried out to investigate the halophtic plant M. forsskalei as wide ecological amplitude plant naturally growing under different habitat conditions of three concerned habitats ( coastal saline habitat , dry saline habitat and irrigated saline habitat.
Plant- soil – inter relationships of the representative plant growing in the naturally selected habitats under different degree of stress conditions were studied in a trail to elucidate some of various ecophysiological adaptive responses of these plants to accommodate their habitats. Quantitative and qualitative analysis in soil mineral composition, photosynthetic pigments , carbohydrates , nucleic acid contents ,nitrogen contents ( total soluble – N; protein –N and amino –N), plant minerals composition , total soluble proteins , growth regulators, terrenes and sterols, fatty acid composition , hydrocarbons and flavonoida content were determined in relations to habitat conditions , including the general physical characteristics , pH, electrical conductance and mineral composition of the associated soil profilees in the selected habitats. The halophyte plant M. forsskalei of wide ecological amplitude showed different mechanisms in their adjustment to different habitat conditions. Data of the present study revealed that the coastal saline habitat plants tended to accumulate higher levels of Ca 2+ and K+ in seesling stage and Na+ in the flowering stage of growth Mg + recorded the highest concentrations 56 mg/ dry g in the dry saline habitat plants if the flowering stage.