STUDY OF SOME PHYSIOLOGICAL RESPONSES TO OXIDATIVE STRESS CAUSED BY ULTRAVIOLET RADIATION IN CANOLA (BRASSICA NAPUS L.) SEEDLINGS

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NASIBI F.; MANOCHEHRI KALANTARI M.

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Journal: IRANIAN JOURNAL OF BIOLOGY Year:2003 | Volume:13 | Issue:3-4 Page(s): 28-38

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Title

STUDY OF SOME PHYSIOLOGICAL RESPONSES TO OXIDATIVE STRESS CAUSED BY ULTRAVIOLET RADIATION IN CANOLA (BRASSICA NAPUS L.) SEEDLINGS

Author(s)

NASIBI F. | MANOCHEHRI KALANTARI M. | Issue Writer Certificate

Keywords

BRASSICA NAPUS L.Q2

OXIDATIVE STRESSQ3

UV RADIATIONQ4

Abstract

Today many researchers investigate the effects of increased UV RADIATION caused by decrease in ozone layer. Production of reactive oxygen species (ROS) and OXIDATIVE STRESS in plant tissuee specially in photosynthetic tissue are one of the effects of this radiation. In this research, we used fluorescence tube enemates wavelength of 250-280, 280-320 and 320-390 nanometer, which include, UV-C, UV-B and UV-A respectively. To investigate some antioxidant activities including ascorbic acid (ASA), carotenoids, lipid peroxidation reaction and amouts of secondary metabolits which absorb UV RADIATION, we used seven days canola seedlings which have been exposed 30 min a days to UV RADIATION for 4 days. Measurment of ASA showed increased of these compound in this plant because of their role in removal of free radicals. chlorophyll decreased specially in B and C bands however carotenoids did not decrease significantly. Malondealdehyde (MDA) is the indicator of the lipid proxidation reaction. Significant increase in MDA in treated plant by UV in our experiment is the indication of fatty acid oxidation in the present of free radicals generated by UV RADIATION. Aggregation of UV absorbent compounds in epidermis layer is one of the protection mechanisms which plants used against increased UV RADIATION. The enzymes of the phenylpropanoid pathway were activated because of the UV RADIATION effects. This activation produced compounds like flavonoids and anthocyanins which prevent penetration of UV to the more sensitive tissue especially mesophylls tissue. In this experiment we observed significant increase of this compounds in UV treated seedlings of canola.

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APA: Copy

NASIBI, F., & MANOCHEHRI KALANTARI, M.. (2003). STUDY OF SOME PHYSIOLOGICAL RESPONSES TO OXIDATIVE STRESS CAUSED BY ULTRAVIOLET RADIATION IN CANOLA (BRASSICA NAPUS L.) SEEDLINGS. IRANIAN JOURNAL OF BIOLOGY, 13(3-4), 28-38. SID. https://sid.ir/paper/21218/en

Vancouver: Copy

NASIBI F., MANOCHEHRI KALANTARI M.. STUDY OF SOME PHYSIOLOGICAL RESPONSES TO OXIDATIVE STRESS CAUSED BY ULTRAVIOLET RADIATION IN CANOLA (BRASSICA NAPUS L.) SEEDLINGS. IRANIAN JOURNAL OF BIOLOGY[Internet]. 2003;13(3-4):28-38. Available from: https://sid.ir/paper/21218/en

IEEE: Copy

F. NASIBI, and M. MANOCHEHRI KALANTARI, “STUDY OF SOME PHYSIOLOGICAL RESPONSES TO OXIDATIVE STRESS CAUSED BY ULTRAVIOLET RADIATION IN CANOLA (BRASSICA NAPUS L.) SEEDLINGS,” IRANIAN JOURNAL OF BIOLOGY, vol. 13, no. 3-4, pp. 28–38, 2003, [Online]. Available: https://sid.ir/paper/21218/en

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