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Effects of drought stress on physiology and antioxidative activity in two varieties of Cynanchum thesioides

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Abstract

Cynanchum thesioides (Freyn) K. Schum. with higher drought tolerance has received much research attention in arid and semiarid areas of China. However, no full evaluation of drought resistance had been made. In the current study, we compared relative water content, water saturation deficit, root vitality, root–cap ratio, photosynthetic pigments and ten physiological indices in C. thesioides and C. thesioides (Freyn) K. Schum. var. australe (Maxim.) Tsiang et P.T. Li. seedlings under a gradient of drought stress. The ten indices included superoxide dismutase, peroxidase, catalase, ascorbate peroxidase and malondialdehyde, hydrogen peroxide, superoxide, proline, soluble protein and sugar content of leaves and roots. Based on the analysis of average membership functional values, the drought tolerance of C. thesioides var. australe was better than C. thesioides. In the future, C. thesioides var. australe should be given priority when selecting varieties for use as medicines in arid and semiarid areas of China.

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Abbreviations

CT:

Cynanchum thesioides (Freyn) K. Schum.,

CA:

Cynanchum thesioides (Freyn) K. Schum. var. australe (Maxim.) Tsiang- et P.T. Li

CK:

Control

LS:

Mild drought stress

MS:

Moderate drought stress

SS:

Severe drought stress

O2 :

Superoxide

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Acknowledgements

We thank a National Natural Science Foundation of China (31101541;31160393) Science Fund of Inner Mongolia of China (2015MS0359) Ph.D. award; Start-up Fund of Inner Mongolia Agricultural University (BT09-17); Scientific Research Project of Public Welfare Industry (Agriculture) (201203004); Inner Mongolia President Fund; and Inner Mongolia Agricultural University Science and Technology Innovation (Nurturing) Team (NDPYTD2013-3) for its financial support.

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H, LZ and Y, ZR supervised the experiment. Z, XY and LZ performed the experiment work and prepared the figures and tables. Z, XY wrote the manuscript. Z, FL edited the final version of the manuscript. Z, XY and Y, ZR contributed equally to this work. All authors have approved the final manuscript.

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Correspondence to Fenglan Zhang.

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Zhang, X., Yang, Z., Li, Z. et al. Effects of drought stress on physiology and antioxidative activity in two varieties of Cynanchum thesioides. Braz. J. Bot 43, 1–10 (2020). https://doi.org/10.1007/s40415-019-00573-8

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  • DOI: https://doi.org/10.1007/s40415-019-00573-8

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