Effect of drought and low light on growth and enzymatic antioxidant system of Picea asperata seedlings

• Autorzy: Yang Y. , Han C. , Liu Q. , Lin B. , Wang J.
• Języki publikacji: EN

Abstrakty

EN

The combined effects of drought and low light on biomass partition, foliar nitrogen concentration, membrane stability and active oxygen species (AOS) and antioxidant system were investigated in dragon spruce (Picea asperata Mast.) seedlings grown at two watering regimes (well-watered, 100% of field capacity and drought, 30% of field capacity) and light availabilities (HL, 100% of full sunlight and low light, 15% of full sunlight). Under high light condition drought not only reduced foliar nitrogen concentration (Nmass) and membrane stability index (MSI) but also significantly increased biomass partitioning to roots, AOS, ascorbic acid (AsA) content and antioxidant enzyme activities including superoxide dismutase (SOD, EC 1.15.1.1), peroxidase (POD, EC 1.11.1.7), catalase (CAT, EC 1.11.1.6), ascorbate peroxidase (APX, EC 1.11.1.11) and glutathione reductase(GR, EC 1.6.4.2). However, no prominently drought-induced differences in biomass partitioning to root, SOD, GR activities, hydrogen peroxide (H2O2) and MSI were observed in low light seedlings. On the other hand, significant interaction of drought and low light was found on MSI, the antioxidant enzymes activities (SOD, POD, CAT, APX, GR), H2O2 and superoxide radical (O2-). These results suggested that seedlings grown at the understory were more sensitive to drought than low light.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2008
• Tom: 30
• Numer: 4
• Opis fizyczny: p.433-440,fig.,ref.

Twórcy

autor

Yang Y.

• Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, 610041 Chengdu, People's Republic of China
• Graduade School of the Chinese Academy of Sciences, 10039 Beijing, People's Republic of China

autor

Han C.

• Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, 610041 Chengdu, People's Republic of China
• Graduade School of the Chinese Academy of Sciences, 10039 Beijing, People's Republic of China

autor

Liu Q.

• Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, 610041 Chengdu, People's Republic of China

autor

Lin B.

• Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, 610041 Chengdu, People's Republic of China

autor

Wang J.

• West Sichuan Forestry Bureau, 623102 Miyaluo, People's Republic of China

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