Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (10): 2321-2331.DOI: 10.3969/j.issn.1004-1524.20221550

• Horticultural Science • Previous Articles     Next Articles

Effects on accumulation of cadmium and antioxidant system of different Morchella spp. under cadmium stress

FAN Liying1,2(), FAN Tingting2, TONG Zongjun3, LIANG Liyun2, ZHAO Zhiyong2, CHEN Hui3, ZHOU Changyan2, ZHAO Xiaoyan2,*()   

  1. 1. School of Health Sciences and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
    2. Institute for Agri-Food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
    3. Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
  • Received:2022-11-03 Online:2023-10-25 Published:2023-10-31

Abstract:

Morchella spp., as a kind of edible fungus cultivated in soil, faces the risk of exposure and accumulation of cadmium (Cd) in the soil environment. In this study, the commonly used cultivars Morchella sextelata M25 and Morchella importuna I15 were selected as test materials to compare and analyze the effects of Cd stress on mycelium physiology and Cd accumulation, specifically including the differences in mycelial growth rate, biomass, microstructure, antioxidant enzymes, antioxidant active substances and Cd content. The results showed that I15 had stronger ability of Cd accumulation than M25. The catalase (CAT), glutathione reductase (GR), ascorbate peroxidase (APX) enzyme activities and malondialdehyde (MDA), ascorbic acid (AsA) contents of the different Morchella spp. showed a trend of first increasing and then decreasing with the increase of Cd concentration, but the GR, glutathione peroxidase (GSH-Px) enzyme activities and glutathione (GSH) contents of I15 were higher than M25. Combining the physiology and Cd accumulation capacity of the different Morchella spp., it found that I15 had stronger accumulation ability, better grow, less damage under Cd stress than M25, also had stronger defense ability against cell damage in the glutathione transformation system. The results of this study not only laid the foundation for the screening of Morchella spp. Cd-resistant strains and the innovation of Cd-containing soil cultivation models, but also provided new insights for fungal bioremediation.

Key words: Morchella, cadmium stress, accumulation, antioxidant enzymes, glutathione transformation system

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