AGRO-MORPHOLOGICAL RESPONSE OF CORN (Zea mays L.) TO A BIOSTIMULANT FROM THE SOUTHEASTERN ALGERIA

Abstract: This study highlights the effect of a biostimulant based on Trichoderma, indigenous antagonistic fungus from the region of Touggourt, on the development of a local variety of corn. This study was conducted at the experimental station of National Institute of Agronomic Research (Sidi Mehdi, Touggourt) as a complete randomaize block designe. The examined agro-morphological parameters showed that the application of this bioproduct stimulates vegetative growth of the plant. Besides, better germination and earliness of seeds. The results showed more interesting values were obtained in the treated plots (height = 135.9 cm, diameter = 28.9 mm, surface of leaves = 318 cm2, Pan = 10.2 panicles/plant) compared to those of the controls (height = 98.6 cm, diameter = 23.7 mm, surface of leaves = 260.4 cm², Pan = 7.4 panicles/plant). Statistical analyzes confirmed the existence of a very highly significant difference between treated and control subjects

Chemical composition and biological properties of Cotula cinerea essential oil from Sahara of Algeria

International audienceThe work focuses on the valorization of the plant Cotula cinerea Del., which grows spontaneously in Algeria. It is collected from two stations in the province of El Oued, to assess the chemical composition of essential oils, from two different zones whereas Beni Guecha is a reg unlike Sidi Aoun is a sandy area characterized by the presence of dunes, and to test biological activities. Oil analysis by CG/MS enabled the identification of 28 terpene components representing 96.94% ± 2.35 of the total oil. The analyzed samples differ significantly in their chemical composition. Dominated by high levels of oxygenated monoterpenes (78% and 41%), the oils are rich in 1.8-cineole, camphor, trans-thujone, cis-chrysanthenol and terpinen-4-ol. Firstly, the antibacterial potential of C. cinerea essential oils showed good inhibition against E. coli ATCC25922 and Staphylococcus aureus ATCC25923 with an inhibitory diameter ranging from (16.70–14.64 mm). In addition, the results of the antioxidant effect of these oils showed that they have moderately weaker antioxidant power than ascorbic acid. On the other hand, these EOs showed significant antifungal potential against the two fungi tested