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Wu Ya, Chen Si, Zhang Wei-Hong, Liu Da-Lin, Fan Ji-Biao, Xu Zhi-Peng, Shen Yu. Growth and physiological responses of Lolium multiflorum to aluminum stress[J]. Plant Science Journal, 2018, 36(5): 755-760. DOI: 10.11913/PSJ.2095-0837.2018.50755
Citation: Wu Ya, Chen Si, Zhang Wei-Hong, Liu Da-Lin, Fan Ji-Biao, Xu Zhi-Peng, Shen Yu. Growth and physiological responses of Lolium multiflorum to aluminum stress[J]. Plant Science Journal, 2018, 36(5): 755-760. DOI: 10.11913/PSJ.2095-0837.2018.50755

Growth and physiological responses of Lolium multiflorum to aluminum stress

  • We used a pot experiment to determine physiological and growth indicators of Lolium multiflorum Lam. under Al3+ stress (0, 100, 200, 300, 400, 500 mg/kg). Results showed that aluminum stress inhibited the growth and biomass accumulation of ryegrass, with higher Al3+ content resulting in stronger inhibition. When Al3+ content in the soil was 500 mg/kg, plant height and shoot dry weight were significantly inhibited; however, when Al3+ content was 100 mg/kg, root length and root dry weight were significantly inhibited. Furthermore, chlorophyll-a, chlorophyll-b, and total chlorophyll in the leaves decreased with the increase in Al3+ concentration. When Al3+ content was 500 mg/kg, chlorophyll-a and chlorophyll-b decreased by 56.81% and 46.57%, respectively. However, soluble sugar content, free proline content, MDA content, and SOD activity in the above-ground shoot and below-ground root systems increased with the increase in Al3+ concentration; however, these four indicators were higher in the shoot than root system.
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