Abstract
In this study, strawberry seedlings were treated with 250 mmol·L-1 NaCl solution; then the O2- production rate, the content of H2O2 and thiobarbituric acid reactive substance (TBARS), electrolyte leakage (EL), the enzyme activity of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) in the root tip cells were determined to be used for analysis after salt stress. The results revealed that the O2- production rate, EL, and the content of TBARS showed an increasing trend with the time of salt stress, while the content of H2O2, the enzyme activity of SOD, POD and CAT exhibited a pattern of increasing first and decreasing later under the salt stress. In conclusion, the results demonstrated that the oxidative damage in root tip cells of strawberry was increased with the time of salt stress, and the enhanced antioxidant activity was not enough to eliminate the peroxidation damage which was caused by 250 mmol·L-1 NaCl solution. Key words: Strawberry root tip, salt stress, the activities of the antioxidant enzymes.
Highlights
Roots are the most important nutrient uptake organs of plants, and the most sensitive parts of salt stress, and promote the plant to make a further response to stress
Salt stress causes a variety of injuries to plant cells, among which ion toxic, osmotic stress and the accumulation of reactive oxygen species (ROS) are the particular problems (Mittler, 2002)
We found that the production rate and the content of H2O2 in the root tip cells of strawberry increased significantly as stress time increased, which is supported by earlier studies, such as soybean, wheat and chickpea
Summary
Roots are the most important nutrient uptake organs of plants, and the most sensitive parts of salt stress, and promote the plant to make a further response to stress. Roots response to salt stress mainly includes growth inhibition, osmotic regulation, protects the enzyme system to operate effectively, the metabolism of active oxygen, the changes of membrane structure and function in the root (Bohra and Doerffling, 1993). Salt stress leads to accumulation of a variety of reactive oxygen species (ROS) in plant cells, such as H2O2 and O2-; the excessive ROS is toxic to the plant cells and causes the peroxidation of membrane lipid, which leads to an increase in the level of EL level and the content of TRABS, and degradation of biological molecules such as proteins, DNA molecules and carbohydrates (Rusty and Regina, 2005; KOC, 2015; Yang and Guo, 2018), affecting the normal functions of these molecules, which interfere with the normal physiological activities of the cells. With facilities in the development of agricultural technology, the cultivation facilities of strawberry have
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
