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. 2009 Jul;4(7):571-3.
doi: 10.4161/psb.4.7.8794. Epub 2009 Jul 20.

Response of antioxidant defense system to laser radiation apical meristem of Isatis indigotica seedlings exposed to UV-B

Yi-Ping Chen  1
Affiliations

Response of antioxidant defense system to laser radiation apical meristem of Isatis indigotica seedlings exposed to UV-B

Yi-Ping Chen. Plant Signal Behav. 2009 Jul.

Abstract

To determine the response of antioxidant defense system to laser radiation apical meristem of Isatis indigotica seedlings, Isatis indigotica seedlings were subjected to UV-B radiation (10.08 kJ m(-2)) for 8 h day(-1) for 8 days (PAR, 220 micromol m(-2) s(-1)) and then exposed to He-Ne laser radiation (633 nm; 5.23 mW mm(-2); beam diameter: 1.5 mm) for 5 min each day without ambient light radiation. Changes in free radical elimination systems were measured, the results indicate that: (1) UV-B radiation enhanced the concentration of Malondialdahyde (MDA) and decreased the activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) in seedlings compared with the control. The concentration of MDA was decreased and the activities of SOD, CAT and POD were increased when seedlings were subjected to elevated UV-B damage followed by laser; (2) the concentration of UV absorbing compounds and proline were increased progressively with UV-B irradiation, laser irradiation and He-Ne laser irradiation plus UV-B irradiation compared with the control. These results suggest that laser radiation has an active function in repairing UV-B-induced lesions in seedlings.

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References

    1. Mckenzie RL, Bjorn LO, Bais A, Llyasd M. Changes in biologically active ultraviolet radiation reaching the earth's surface. Photochem Photobiol Sci. 2003;2:21–22. - PubMed
    1. Tegelberg R, Veteli T, Aphalo PJ, Julkunen-Tiitto R. Clonal differences in growth and phenolics of willows exposed to elevated ultraviolet-B radiation. Basic Appl Ecol. 2003;7:4219–4228.
    1. Rousseaux MC, Ballare CL, Giordano CV, Scopel AL, Zima AM, Szwarcberg-Bracchitta M, et al. Ozone depletion and UV-B radiation: impact on plant DNA damage in southern South America. Proc Natl Acad Sci USA. 1999;96:15310–15315. - PMC - PubMed
    1. Doughty CJ, Hope AB. Effects of ultraviolet B radiation on the plasma membranes of chaaraorllina. Aust J Plant Physiol. 1976;3:677–684.
    1. Kramer GF, Norman HA, Krizek DT, Mirechi RM. Influence of UV-B radiation polyamines, lipid peroxidation and membrane lipid in cucumber. Phytochemistry. 1991;7:2101–2112.

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