A comparison among four light emitting diode (LED) lights including red LED (R), blue LED (B), red (70%) + blue (30%) LED (RB) and white LED (W) as well as fluorescent (F) light was made on antioxidative capacity of Arabidopsis thaliana (L.) Heynh. in response to wounding. Under wound-stress condition, LED-exposed plants, especially RB-irradiated plants, maintained significantly higher shoot dry weight and antioxidant enzymes activities compared with those irradiated with fluorescent lights. The highest amounts of both chlorophyll a and b were observed in the leaves treated with B light. Also, the concentration of H2O2 was higher under the condition of RB and B lights compared with the other light environments. The highest amount of malondialdehyde was measured in plants exposed to F and B lights. Similarly, wounded leaves under F and B light conditions showed the maximum lipoxygenase activity, whereas R-exposed leaves had the lowest lipoxygenase activity. In contrast, the highest level of phenolic compounds was found in R and RB exposed leaves in response to wounding. Among the five light treatments, RB and B lights were more effective in stimulating anthocyanin synthesis; however, RB-exposed plants were more efficient in the late-induction of the PAL gene (phenylalanine ammonia lyase catalyses the first step of the general phenylpropanoid pathway). Collectively, we reasoned that RB light condition gives a superior capacity to Arabidopsis thaliana to tolerate wound-stress. Also, we propose the probable signalling role of ROS in light-stimulated wound responses in Arabidopsis.
机构:
Department of Plant Physiology, Maria Curie-Skłodowska Univ., Akademicka 19, 20-033 Lublin, PolandDepartment of Plant Physiology, Maria Curie-Skłodowska Univ., Akademicka 19, 20-033 Lublin, Poland
Dra̧zkiewicz M.
Skórzyńska-Polit E.
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Department of Plant Physiology, Maria Curie-Skłodowska Univ., Akademicka 19, 20-033 Lublin, PolandDepartment of Plant Physiology, Maria Curie-Skłodowska Univ., Akademicka 19, 20-033 Lublin, Poland
Skórzyńska-Polit E.
Krupa Z.
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Department of Plant Physiology, Maria Curie-Skłodowska Univ., Akademicka 19, 20-033 Lublin, PolandDepartment of Plant Physiology, Maria Curie-Skłodowska Univ., Akademicka 19, 20-033 Lublin, Poland
机构:
Korea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea
Univ Sci & Technol, KRIBB Sch Biosci, Dept Funct Genom, Daejeon 34113, South KoreaKorea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea
Shin, Seung Yong
Park, Su-Jin
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Korea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea
Univ Sci & Technol, KRIBB Sch Biotechnol, Dept Biosyst & Bioengn, Daejeon 34113, South KoreaKorea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea
Park, Su-Jin
Kim, Hyun-Soon
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Korea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea
Univ Sci & Technol, KRIBB Sch Biotechnol, Dept Biosyst & Bioengn, Daejeon 34113, South KoreaKorea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea
Kim, Hyun-Soon
Jeon, Jae-Heung
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Korea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South KoreaKorea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea
Jeon, Jae-Heung
Lee, Hyo-Jun
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Korea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea
Univ Sci & Technol, KRIBB Sch Biosci, Dept Funct Genom, Daejeon 34113, South KoreaKorea Res Inst Biosci & Biotechnol, Plant Syst Engn Res Ctr, Daejeon 34141, South Korea