الفهرس Only 14 pages are availabe for public view
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Abstract
North Sinai Governorate is subjected to a great problem of agriculture with underground saline water and this causes serious effects to crop production especially wheat crop. Of the 59 plant species surveyed from soils of North Sinai Governorate, 53 had mycorrhizal infection and 6 plants were non-mycorrhizal. Most cultivated plant species were infected with mycorrhizal fungi. Arbuscular mycorrhizal Fungal species isolated are, Glomus mosseae, Glomus clarum, Glomus monosporum, Glomus caledonium, Gigaspora margarita and Acaulospora laevis. A pot experiment was carried out to evaluate the changes of growth criteria, photosynthetic pigment, main metabolites concentration, some water relations and some enzymes activity in tillering, booting and anthesis stages of wheat plants irrigated with underground saline water. Furthermore, polyamines level was also investigated in the anthesis phase. AM colonization has been reported to increase plant growth under saline conditions by overcoming the detrimental growth effects of NaCl. AM have been shown to decrease yield losses of wheat plants in saline soils. The intensity of mycorrhizal infection of wheat roots was significantly higher in inoculated plants as compared with non-inoculated ones. At yield stage of wheat plants, salinity stress significantly reduced the grain yield, grains number, grain biomass and harvest index. Also high salinity greatly affect the biochemical aspects of the developed wheat grains.