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Responses in the physiology and biochemistry of Korean pine (Pinus koraiensis) under supplementary UV-B radiation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zu, Yuan Gang Wei, Xiao-Xia Yu, Jing Hua Li, Dong Pang, H. H. Tong, Li-Jin |
| Copyright Year | 2011 |
| Abstract | The effect of supplementary UV-B radiation on Korean pine (Pinus koraiensis Sieb. et Zucc) was investigated. Compared with the control, the T1, T2, and T3 UV-B treatments increased by 1.40, 2.81, and 4.22 kJ m−2 d−1, respectively. Gas-exchange parameters, photosynthetic pigment concentrations, contents of secondary metabolites, epicuticular wax, free radical, malondialdehyde (MDA), and the activities of antioxidant enzymes were determined after 40 d of exposure. The concentrations of chlorophyll (Chl) a, Chl b, total Chl, carotenoid (Car), and the ratio Chl a/b in the pine needles were in the following order: T1 > T2 > T3. Compared with the control, the contents of flavonoids and epicuticular wax significantly decreased in all levels of supplementary UV-B radiations (p<0.05). Moreover, the contents of hydrogen peroxide (H2O2) and MDA significantly increased with the enhanced UV-B radiations (p<0.05). Korean pine can increase the catalase, ascorbate peroxidase, and superoxide dismutase activities to prevent oxidative stress by supplementary UV-B radiation. However, its defence mechanism is not efficient enough to prevent UV-Binduced damage. |
| Starting Page | 448 |
| Ending Page | 458 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s11099-011-0057-4 |
| Volume Number | 49 |
| Alternate Webpage(s) | https://ps.ueb.cas.cz/pdfs/phs/2011/03/15.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/s11099-011-0057-4 |
| Journal | Photosynthetica |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
