List of Articles Open Access Article Abstract Page Full-Text 1 - Responses of growth and antioxidative enzymes to various concentrations of nickel in Zea mays leaves and roots. Fatemeh Ghasemi*, Reza Heidari, Rashid Jameii and Latifeh Purakbar 10.30495/ijpp.2012.540777 Open Access Article Abstract Page Full-Text 2 - Effect of gamma irradiation or potassium on oxidative stress and antioxidant system of cadmium stressed Brassica rapa (L.) plant. Shaimaa Abd El-Hameed Abo Hamad, Mahmoud Abu Elyazeed Abd Elhaak and Khalil Mahfouz Ghareeb Saad-Allah* 10.30495/ijpp.2012.540778 Open Access Article Abstract Page Full-Text 3 - Effect of drought stress and different planting dates on safflower yield and its components in Tabriz region. Afsoon Tayebi 1*, Hossein Afshari 2, Farhad Farahvash 3, Jafar Masood Sinki 2 and Somayeh Nezarat4 10.30495/ijpp.2012.540779 Open Access Article Abstract Page Full-Text 4 - Arbuscular Mycorrhizal fungi and precursor feeding improve protein and trypthopan decarboxylase enzyme content in Cathaaranthus roseus L. Samaneh Rahmatzadeh1*, Jalil Khara1 and Seyed Kamal Kazemitabar2 10.30495/ijpp.2012.540780 Open Access Article Abstract Page Full-Text 5 - Seasonal changes in antioxidant activity, flavonoid, anthocyanin and phenolic compounds in Flavoparmelia caperata (L.) Hale and Physcia dubia (Hoffm.) Lettau from Babol forest sites in north of Iran. Mahlagha Ghorbanli*, Tannaz Amirkian Tehran and Maryam Niyakan 10.30495/ijpp.2012.540781 Open Access Article Abstract Page Full-Text 6 - B-Glucan contents in calli of Oryza sativa L. var Hashemi under different nutritional treatments . Golnaz Tajadod1*, Mozhgan Farzami Sepehr2, Zeinab Kalami1 10.30495/ijpp.2012.540782 Open Access Article Abstract Page Full-Text 7 - Early induction of phenolic compounds in aluminum-treated roots of Brassica oleracea L. Roya Saghian1 and Faezeh Ghanati2* 10.30495/ijpp.2012.540783 Open Access Article Abstract Page Full-Text 8 - Investigating the most effective compounds in medicinal plant of Sambucus nigra in Azarbayjan region. Kobra Asaadi 1 , Pezhman Moradi 1*, Kumarss Amini 2, Saeideh Habibi Lahiji1 10.30495/ijpp.2012.540784 Open Access Article Abstract Page Full-Text 9 - Gel Purification of PCR Products. Fatemeh Mehrpooyan* 10.30495/ijpp.2012.540785