Effects of exogenous Ca2+ on re-greening physiological characteristics of Lamiophlomis rotata

doi:10.7522/j.issn.1000-694X.2019.00079

Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (2): 156-164.DOI: 10.7522/j.issn.1000-694X.2019.00079

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Effects of exogenous Ca²⁺ on re-greening physiological characteristics of Lamiophlomis rotata

Sha Jie¹, Chen Yuan^1,2, Guo Fengxia¹, Hu Longsheng³, Liang Wei¹, Zhao Ruiming¹

1. Gansu Provincial Key Lab. of Good Agricultural Production for Traditional Chinese Medicines/Gansu Provincial Engineering Research Centre for Medical Plant Cultivation and Breeding/Gansu Provincial Key Lab. of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China;
2. Gansu Engineering Lab. of Resource Reservation and Utilization for Characteristic Medical Plants/Gansu Cultivated Engineering and Technology Research Center of Standardization and Traceability for Characteristic Chinese Medicine, Gansu Tasly Zhongtian Pharmace. Co., Ltd, Dingxi 748100, Gansu, China;
3. Agricultural and rural Bureau of Chengguan District of Lanzhou City, Lanzhou 730000, Gansu, China

Received:2019-07-23 Revised:2019-09-25 Online:2020-03-20 Published:2020-04-26

Abstract

Abstract: Lamiophlomis rotata is an endangered medicinal plant distributed in the Qinghai-Tibet Plateau. In order to study the effects of exogenous Ca²⁺ on the L.rotata, 36 plants and 36 seedlings were selected at Maqu Wild Tending Base, different concentrations of CaCl₂ (0, 5, 10, 15, 20 and 25 mmol·L^-1) were sprayed at different times before wintering. And each treatment sample was taken back to the laboratory to determine the resistance related physiological and biochemical indexes, such as the membrane stability, osmotic adjustment, membrane lipid peroxidation, antioxidant enzymes in the leaves. The results shown that exogenous Ca²⁺ had a significant impact on the resistance index of L. rotate after low temperature treatment in different concentrations. The degree of influence varies with the treatment concentrations and spray times. The proper CaCl₂ concentration (the best concentration located to 2 twice 15 mmol·L^-1) can significantly regulate soluble sugar content, antioxidant enzymes such as SOD and POD activities, which consequently mitigate the membrane lipid peroxidation and enhance the stability of the membrane systems. Moreover, exogenous Ca²⁺ can reduce the relative conductivity and MDA content, and increase root activity. In conclution, exogenous Ca²⁺ can increase the rate of re-green of L. rotata, and which have a potential application value in domestication and nurture of L. rotate.

Key words: Lamiophlomis rotata, exogenous Ca²⁺, live through the winter, physiological traits

CLC Number:

Q945.79

Sha Jie, Chen Yuan, Guo Fengxia, Hu Longsheng, Liang Wei, Zhao Ruiming. Effects of exogenous Ca²⁺ on re-greening physiological characteristics of Lamiophlomis rotata[J]. Journal of Desert Research, 2020, 40(2): 156-164.

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Effects of exogenous Ca²⁺ on re-greening physiological characteristics of Lamiophlomis rotata

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