BIOCHEMICAL CHANGES OF SOME OILY SEEDS AS INFLUENCED BY fUNGIINFECTION

Abstract

Seeds of soybean (Glycine max) variety (Clark) and sunflower (Giza 4) were obtained from Goremorate Monofiya, Egypt. Fungi associated with soybean and sunflower seeds were isolated and identified using the morphological characteristics of mycelia. The identified fungi were Aspergillus niger, Fusarium spp. Aspergillusjlavus, penicillium spp. Two from the isolated fungi were used in the present study depending on they were the most pathogenic from the isolated fungi. These fungi were Aspergillus niger and Fusarium spp. The seeds mixed with fungi in rate 20% of seeds weight and then stored for various periods 2,4 and 6 months the effect of fungi on chemical constituents of soybean and sunflower seeds could be summerised as follows: 1- Fungi under study caused decrerase the total protein content and total carohydrate, meanwhile lipid content increased in soybean seeds stored for various periods as result of fungi infection. 2- Changes in the major constiuents of sunflower seeds as results of fungi infection can summarized as follows: increas in total lipids and total carbohydrate decreased in seeds infected by Aspergillus niger and Fusarium spp. in all storing periods. 3- Fungi infection caused decrease in all carbohydrate fraction of soybean seeds in all periods of storing. 4- Fungi infection caused decrease in the non-reducing and total soluble sugars, meanwhile the reducing sugars increased as result of fungi infection of sunflower seeds.