University of Isfahan Journal of Plant Biological Sciences 3041-9603 2 6 2011 02 20 The effects of post-harvest UV-B radiation on some antioxidant compounds, PAL activity and total protein contents of ripe red tomato (Lycopersicon esculentum) The effects of post-harvest UV-B radiation on some antioxidant compounds, PAL activity and total protein contents of ripe red tomato (Lycopersicon esculentum) 29 38 18794 FA Azadeh Bijami Farkhondeh Rezanejad Department of Biology, Faculty of Science, Shahid Bahonar University, Kerman Hossein Ali Sasan Department of Biology, Faculty of Science, Shahid Bahonar University, Kerman Journal Article 2016 06 14 Ultraviolet radiation is a part of sunlight spectrum and is divided into three bands A, B, and C, due to the wavelength. Plants which are incapable of movements, protect themselves against this kind of radiation, by two enzymatic and non-enzymatic mechanisms. These mechanisms can be used in order to increase medicinal products. In This study, the effects of different UV-B dosages (application of different post harvest illumination durations 1, 2 and 4 hours) on the content of some antioxidant compounds (i.e., flavonoids, anthocyanin, total phenolic and lecopene contents), activity of PAL and total protein of ripe red tomato fruit (Lycopersicon esculentum Mill.) were studied. The amount of flavonoids increased in comparison with the control, in all treatments. The changes of anthocyanin content was similar to that of the flavonoids. UV treatment of 2 and 4 hours increased total phenolic compounds. Similar results were observed in lycopene content under UV-B. This radiation increased PAL activity, but decreased protein content. Thus, it is concluded that exposure of tomato fruit to UV-B increased antioxidant compounds. Ultraviolet radiation is a part of sunlight spectrum and is divided into three bands A, B, and C, due to the wavelength. Plants which are incapable of movements, protect themselves against this kind of radiation, by two enzymatic and non-enzymatic mechanisms. These mechanisms can be used in order to increase medicinal products. In This study, the effects of different UV-B dosages (application of different post harvest illumination durations 1, 2 and 4 hours) on the content of some antioxidant compounds (i.e., flavonoids, anthocyanin, total phenolic and lecopene contents), activity of PAL and total protein of ripe red tomato fruit (Lycopersicon esculentum Mill.) were studied. The amount of flavonoids increased in comparison with the control, in all treatments. The changes of anthocyanin content was similar to that of the flavonoids. UV treatment of 2 and 4 hours increased total phenolic compounds. Similar results were observed in lycopene content under UV-B. This radiation increased PAL activity, but decreased protein content. Thus, it is concluded that exposure of tomato fruit to UV-B increased antioxidant compounds. https://ijpb.ui.ac.ir/article_18794_4b56a98252606a90d5ae03332bca0a82.pdf