University of Tabriz Journal of Plant Physiology and Breeding 2008-5168 7 2 2017 12 01 Effect of Putresine and Methyl Jasmonate on Antioxidant Responses in Peel and Pulp of Orange (Citrus sinensis L. var. Valencia) Fruit تاثیر پوتریسین و متیل جاسمونات روی پاسخ های آنتی اکسیدانی در پوست و گوشت میوه های پرتقال رقم والنسیا 41 52 7974 EN Soheila Mohammadrezakhani Department of Horticultural Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran Zahra Pakkish Department of Horticultural Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran Vahid Reza Saffari Department of Horticultural Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran Journal Article 2016 05 27 <br />This experiment was carried out to determine the effects of putrescine and methyl jasmonate on lipid peroxidation and altering the peroxide hydrogen of peel and pulp of Valencia orange fruit. Orange fruits were treated with 0 (control), 2.5 and 5 mM putrescine, and 0 (control), 10 and 20 µM methyl jasmonate, then stored at 5±1 °C, 85-90% relative humidity for four months. Oranges treated with 5 mM putrescine and 10 µM methyl jasmonate had significantly lower lipid peroxidation and peroxide hydrogen of peel and pulp and lower chilling injury percentage than the non-treated fruits. Polyphenol oxidase (PPO) activity was considerably increased in the treated and non-treated fruits but, the treated fruits exhibited significantly lower activity of PPO. Peroxidase (POD) activity increased at first and then decreased. However, the treated fruits exhibited significantly higher activity of POD than the control fruits during the storage period. In conclusion, fruits treated with 5 mM putrescine combined with 10 µM methyl jasmonate showed the best effect.<br />  https://breeding.tabrizu.ac.ir/article_7974_80ec7a677757ebeb18af07280524d0ea.pdf