LED lights increase an antioxidant capacity of Arabidopsis thaliana under wound-induced stresses

被引:7
|
作者
Mirzahosseini, Zahra [1 ]
Shabani, Leila [1 ,2 ]
Sabzalian, Mohammad R. [3 ]
机构
[1] Shahrekord Univ, Dept Biol, Fac Sci, Shahrekord, Iran
[2] Shahrekord Univ, Res Inst Biotechnol, Shahrekord, Iran
[3] Isfahan Univ Technol, Coll Agr, Dept Agron & Plant Breeding, Esfahan 8415683111, Iran
关键词
anthocyanin; antioxidant enzyme; Arabidopsis thaliana; light emitting diode; phenolic compounds; wounding; BLUE-LIGHT; RED-LIGHT; PHENOLIC-COMPOUNDS; GENE-EXPRESSION; EMITTING-DIODES; PLANT-GROWTH; IRRADIATION; GREENHOUSE; INFECTION; RESPONSES;
D O I
10.1071/FP19343
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
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.
引用
收藏
页码:853 / 864
页数:12
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