List of Articles Open Access Article Abstract Page Full-Text 1 - The effect of sulphate on amount of pigments photosynthesis and activity of catalase,peroxidase and nitrate reductase in leaf and root of canola (Brassica napus L. cv Hyola 401) Maryam Niakan Mohammad hossain Mohammadi Vali ollah Rameah Abbas ali Nourinia 10.30495/iper.2006.689405 Open Access Article Abstract Page Full-Text 2 - The effect of continuous illumination and photoperiods on growth and heterocyst frequency of cyanobacterium Fischerella ambigua from Golestan province Fereshte Vakili Kayvan Ghorchibeigi Neda Soltani Shadman Shokravi 10.30495/iper.2006.690227 Open Access Article Abstract Page Full-Text 3 - Early effects of salinity on nitrate assimilation in soybean (Glycine max L cv. Pershing) seedlings Arian Sateie Mahlagha Gorbanli Open Access Article Abstract Page Full-Text 4 - Selection of wheat (Triticum aestivum L.) genotypes under salt stress condition Abbasali Nourinia Open Access Article Abstract Page Full-Text 5 - Effect of auxin on growth, development and yield of two cultivars of peanut (Arachis hypogaea L.) Open Access Article Abstract Page Full-Text 6 - Ethnobotany and folk pharmaceutical knowledge of the major trees or shrubs in North of Iran معصومه Mazandarani Open Access Article Abstract Page Full-Text 7 - A micro – macro morphological survey to assess the taxonomic relationship of Linm species in Iran فریبا Sharifnia مصطفی Assadi,