Effects of NaHSO3 on Photosynthesis and Reactive Oxygen and Nitrogen Metabolism Enzyme Activity in Ginger Leaves

ACTA HORTICULTURAE SINICA ›› 2013, Vol. 40 ›› Issue (8): 1494-1500.

• Vegetables • Previous Articles Next Articles

Effects of NaHSO₃ on Photosynthesis and Reactive Oxygen and Nitrogen Metabolism Enzyme Activity in Ginger Leaves

LI Hai-dong1，ZHANG Yong-zheng1，XU Kun1,*，and XIAO Jing2

（1College of Horticulture Science and Engineering，Shandong Agricultural University/State Key Laboratory of Crop Biology/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops in Huanghuai Region，Ministry of Agriculture，Tai’an，Shandong 271018，China；2Agrotechnical Station，Agricultural Bureau of Daiyue District，Tai’an，Shandong 271000，China）

Received:2013-02-10 Online:2013-08-25 Published:2013-08-25

Abstract

Abstract: Gas exchange，chlorophyll fluorescence，the Mehler reaction，and activities of nitrate reductase，glutamine synthetase，and glutamate synthase were measured after addition of the photorespiration inhibitor NaHSO₃ in ginger leaves. According to our results，after 1 day of NaHSO₃ treatment，the net photosynthetic rate increased by 19% compared with the control. The rate subsequently decreased and was reduced by 17% compared with the control on day 6. Meanwhile，stomatal conductance and the intercellular CO₂ concentration decreased. NaHSO₃ treatment significantly decreased the F_v/F_m，Ф_PSII，q_P，and activities of nitrate reductase，glutamine synthetase and glutamate synthase，and increased NPQ，the Mehler reaction，and H₂O₂ concentration. These results show that carbon and nitrogen metabolism is reduced when NaHSO₃ inhibits photorespiration in ginger leaves.

Key words: ginger, photorespiration, light energy allocation, nitrogen metabolism

LI Hai-dong1，ZHANG Yong-zheng1，XU Kun1,*，and XIAO Jing2. Effects of NaHSO₃ on Photosynthesis and Reactive Oxygen and Nitrogen Metabolism Enzyme Activity in Ginger Leaves[J]. ACTA HORTICULTURAE SINICA, 2013, 40(8): 1494-1500.

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Effects of NaHSO₃ on Photosynthesis and Reactive Oxygen and Nitrogen Metabolism Enzyme Activity in Ginger Leaves

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