Responses in the physiology and biochemistry of Korean pine ( Pinus koraiensis ) under supplementary UV-B radiation
作者： Y. G. Zu , X. X. Wei , J. H. Yu , D. W. Li , H. H. Pang
DOI: 10.1007/S11099-011-0057-4
关键词: Epicuticular wax 、 Photosynthetic pigment 、 Chlorophyll 、 Botany 、 Catalase 、 Antioxidant 、 Malondialdehyde 、 Superoxide dismutase 、 Biology 、 Pinus koraiensis 、 Food science
摘要: The effect of supplementary UV-B radiation on Korean pine (Pinus koraiensis Sieb. et Zucc) was investigated. Compared with the control, T1, T2, and T3 treatments increased by 1.40, 2.81, 4.22 kJ m−2 d−1, respectively. Gas-exchange parameters, photosynthetic pigment concentrations, contents secondary metabolites, epicuticular wax, free radical, malondialdehyde (MDA), activities antioxidant enzymes were determined after 40 d exposure. concentrations chlorophyll (Chl) a, Chl b, total Chl, carotenoid (Car), ratio a/b in needles following order: T1 > T2 T3. flavonoids wax significantly decreased all levels radiations (p<0.05). Moreover, hydrogen peroxide (H2O2) MDA enhanced can increase catalase, ascorbate peroxidase, superoxide dismutase to prevent oxidative stress radiation. However, its defence mechanism is not efficient enough UV-Binduced damage.
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