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Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (3): 482-488.DOI: 10.3969/j.issn.1000-2561.2020.03.009

• Phytophysiology and Biochemistry • Previous Articles     Next Articles

Analysis on Acid-aluminum Stress Response of Two Wild Alfalfa Resources in Yunnan

WU Lifang1,WEI Xiaomei1,ZHANG Lifang1,GUI Baolin2   

  1. 1. College of Biological Resource and Food Engineering / Center for Yunnan Plateau Biological Resources Protection and Utilization, Qujing Normal University, Qujing, Yunnan 655011, China
    2. Soil Fertilizer Workstation, Xundian County Agricultural Bureau, Xundian, Yunnan 650224, China
  • Received:2019-07-16 Revised:2019-08-28 Online:2020-03-25 Published:2020-04-16


Two wild alfalfa resources (Medicago lupulina, Medicago sativa) in Yunnan were used to study the effects of acid-aluminum stress on alfalfa seedling growth under water culture. The tolerance of the two alfalfa to acid and aluminum was compared by analyzing the changes of peroxidase and superoxide dismutase activities, root length, plant height, biomass, root vigor, chlorophyll content, malondialdehyde content under single and compound treatment of acid and aluminum. The seedling growth of the two alfalfas was inhibited significantly under acidity treatment. Comparation with pH 7.0 and pH 3.0, the root length, plant height, biomass and root activity of M. lupulina increased less than that of M. sativa. There were significant differences in the indexes for root length, plant height, biomass, root vigor between the two alfalfa resources under aluminum treatment. Seedling growth was seriously reduced with the increase of aluminum concentration. The influences of acidity and aluminum compound treatment on the seedling growth of the two alfalfa were greater than those of either stress in isolation. The growth of the two alfalfa was most severely inhibited under the pH 4.5, Al 3+ 300 mg/L treatment. Under the conditions of acid, aluminum or acid-aluminum stress treatments, the tolerance of M. lupulina to acid, aluminum and acid-aluminum was better than that of M. sativa from the point of view of the indexes of growth or decline of seedling growth, physiological indicators, inhibition rate.

Key words: alfalfa, acid-aluminum stress, seedling growth, antioxidant enzyme system

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