Abstract
In this study, 0, 0.5, 1, 1.5, 2, 4, 6 and 8 mg·kg−1 of cadmium were added to the cultivation materials. In order to study the effects of different concentrations of Cd stress on J1 and J77, the contents of antioxidant enzymes, proline and malondialdehyde, Cd content, agronomic traits and yield of fruiting bodies of Agaricus brasiliensis were determined, and the nutritional components such as polysaccharide, triterpene, protein, total sugar and total amino acid were determined. The results showed that the physiological indexes of strain J1 and J77 changed regularly under different concentrations of Cd stress. J1 was a high absorption and low tolerance variety, while J77 was a low absorption and high tolerance variety. Low concentration of Cd promoted the growth of strain J1, and higher concentration of Cd promoted the growth of strain J77. The contents of protein and total amino acids in the two strains changed greatly, followed by polysaccharides, which indicated that Cd stress had the greatest impact on the three nutrients, and other nutrients were not sensitive to Cd stress.
Highlights
In this study, 0, 0.5, 1, 1.5, 2, 4, 6 and 8 mg·kg−1 of cadmium were added to the cultivation materials
The results showed that the yield of A. brasiliensis decreased under high concentration Cd stress, and with the increase of Cd concentration, the Cd content in fruiting bodies showed an upward trend[19]
Through 20 years of research on the Cd-enrichment regulations of A. brasiliensis, we found that different strains had different capacity of Cd accumulation and J1 was a variety with low Cd tolerance and high Cd accumulation, while J77 was a variety with high Cd tolerance and low Cd a ccumulation[21]
Summary
0, 0.5, 1, 1.5, 2, 4, 6 and 8 mg·kg−1 of cadmium were added to the cultivation materials. In order to study the effects of different concentrations of Cd stress on J1 and J77, the contents of antioxidant enzymes, proline and malondialdehyde, Cd content, agronomic traits and yield of fruiting bodies of Agaricus brasiliensis were determined, and the nutritional components such as polysaccharide, triterpene, protein, total sugar and total amino acid were determined. Heavy metal exposure has been observed to have a plethora of detrimental effects on plant physiology such as stunted growth, chlorosis, reduced biochemical and metabolomic functions, low yields and poor fruit q uality[12]. The main research contents of this study are: (1) The influence of Cd on agronomic traits including yield, stipe length, etc., (2) The influence of Cd on the antioxidant system, (3) The influence of Cd on the nutritions of fruiting bodies. The purpose of the research is to systematically reveal the effect of Cd on the antioxidant system of A. brasiliensis of different genotypes (different Cd absorption and tolerance) and the effect on nutritions, laying the foundation for food safety and nutritions evaluation
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