A comparison of physiological responses among four cultivars of soybean (Glycine max (L.) Merr.) to single and combined exposure of ozone and peroxides

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  • A comparison of physiological responses among four cultivars of soybean (<i>Glycine max</i> (L.) Merr.) to single and combined exposure of ozone and peroxides

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Crop response to future air pollution stress is important information for crop production in the future. Ozone (O3) and peroxides are recognized as significantly damaging air pollutants to plants. Therefore, the present research aimed to investigate the single and combined effects of O3 and peroxides on leaf injury and physiological responses, and to compare the soybean cultivar sensitivities under exposure to single O3 and combined O3 and peroxides. Two Japanese soybean cultivars, Tachinagaha (TC), and Chamame (CM) and two Thai soybeans, A75 and Sorjor 5 (SJ5) were selected as plant materials. Four treatment plots were set up, including a control plot (C plot: free O3 and peroxides), O3 50 ppbv (O plot), O3 50 ppbv and peroxides 2-3 ppbv (OP1 plot) and O3 50 ppbv and peroxides 4-5 ppbv (OP2 plot). We found that combined O3 and several ppbv peroxides (OP2 plot) caused more severe damage than the OP1 plot and single O3 (O plot) to leaf injury, chlorophyll content and photosynthetic rate, and reduced total dry weight and pod dry weight. In combined O3 and peroxides exposure, SJ5 showed the most sensitive cultivar in leaf injury, photosynthetic rate, biomass and pod dry weight, while CM showed less sensitivity for photosynthetic rate and pod dry weight.

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  • 農業気象

    農業気象 69 (3), 135-145, 2013

    日本農業気象学会

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