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Resistance of highland barley seedlings to alkaline salt and freeze-thaw stress with the addition of potassium fulvic acid

Author

Listed:
  • Yan Qu

    (Key Laboratory of Groundwater Resources and Environment of the Ministry of Education (Jilin University); Jilin Provincial Key Laboratory of Water Resources and Environment; College of New Energy and Environment, Jilin University, Changchun, P.R. China)

  • Guozhang Bao

    (Key Laboratory of Groundwater Resources and Environment of the Ministry of Education (Jilin University); Jilin Provincial Key Laboratory of Water Resources and Environment; College of New Energy and Environment, Jilin University, Changchun, P.R. China)

  • Xinyu Pan

    (Key Laboratory of Groundwater Resources and Environment of the Ministry of Education (Jilin University); Jilin Provincial Key Laboratory of Water Resources and Environment; College of New Energy and Environment, Jilin University, Changchun, P.R. China)

  • Jiancai Guo

    (Key Laboratory of Groundwater Resources and Environment of the Ministry of Education (Jilin University); Jilin Provincial Key Laboratory of Water Resources and Environment; College of New Energy and Environment, Jilin University, Changchun, P.R. China)

  • Tong Xiang

    (Key Laboratory of Groundwater Resources and Environment of the Ministry of Education (Jilin University); Jilin Provincial Key Laboratory of Water Resources and Environment; College of New Energy and Environment, Jilin University, Changchun, P.R. China)

  • Xinyu Fan

    (Key Laboratory of Groundwater Resources and Environment of the Ministry of Education (Jilin University); Jilin Provincial Key Laboratory of Water Resources and Environment; College of New Energy and Environment, Jilin University, Changchun, P.R. China)

  • Xin Zhang

    (College of Biological and Agricultural Engineering, Jilin University, Changchun, P.R. China)

  • Yinan Yang

    (College of Horticulture, Jilin Agricultural University, Changchun, P.R. China)

  • Bairu Yan

    (Environmental Monitoring Center Station of Jilin Province, Changchun, P.R. China)

  • Hongwei Zhao

    (The Administration of Jingyu Water Conservation, Jingyu, Jilin Province, Jingyu, P.R. China)

  • Guomei Li

    (Yushu Forestry and Grassland Comprehensive Service Center, Yushu, P.R. China)

Abstract

Crops are commonly subjected to freeze-thaw and salt stress factors simultaneously in Qinghai-Tibet Plateau. In the agricultural field, potassium fulvic acid can not only promote plant growth and increase crop yield but also enhance plant resistance to stress. In this study, the changes of osmotic adjustment substances, antioxidant enzyme activities and photosynthetic characteristics of barley seedlings under alkaline salt and freeze-thaw stress were investigated by laboratory simulation. The results showed that under single alkaline salt stress, the soluble protein content increased significantly (P < 0.05), and the malondialdehyde (MDA) content of seedlings increased by 63.1%; however, antioxidant enzymes activities and photosynthetic rate of barley seedlings decreased. Under combined stresses of alkaline salt and freeze-thaw, the soluble protein content, antioxidant enzyme activities, and photosynthetic rate of barley seedlings decreased; in contrast, the MDA content of seedlings increased. With the addition of potassium fulvic acid, the soluble protein content of seedlings increased, MDA content decreased significantly (P < 0.05), and enzyme activities tended to be stable. This study revealed that the addition of a proper amount of potassium fulvic acid could mitigate the damage of alkali salt and freeze-thaw stress on barley seedlings.

Suggested Citation

  • Yan Qu & Guozhang Bao & Xinyu Pan & Jiancai Guo & Tong Xiang & Xinyu Fan & Xin Zhang & Yinan Yang & Bairu Yan & Hongwei Zhao & Guomei Li, 2022. "Resistance of highland barley seedlings to alkaline salt and freeze-thaw stress with the addition of potassium fulvic acid," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 68(7), pages 299-308.
    • Handle: RePEc:caa:jnlpse:v:68:y:2022:i:7:id:84-2022-pse
    DOI: 10.17221/84/2022-PSE
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