Effects of cadmium stress on physiological indexes and fruiting body nutritions of Agaricus brasiliensis

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.

Bioaccumulation and physiological changes in the fruiting body of Agaricus bisporus (Large) sing in response to cadmium

“…However, the protein content inconsiderably increased with the increase of Cd stress content in the flat stage. Similar results are found 38 . The changes in protein content were independent of stress content without a significant change.…”

“…3 a), which was significantly higher than in CK, i.e., an increase of 26.69%. In the closed cup stage, the SOD activities increased with the increase of Cd content but were still lower than CK, which was similar to Cd stress in A. brasiliensis strain J1 38 . Here, SOD activity decreased with Cd stress content, indicating that SOD fails to be sufficient to detoxify O 2 − to protect the plant from cellular damage which resulted in the generation of more O 2 − under Cd stress 40 .…”

“…Most of the previous reports have found the content of soluble sugar in the body increased under heavy metals stress 35 , 40 . For example, With the increase of Cd concentration, polysaccharides of A. brasiliensis strain J1 showed an upward trend with a significant difference compared with the control treatment, which indicated that Cd concentration might promote the accumulation of polysaccharides of J1 38 . In the present study, the soluble sugar content in the closed-cup stage gradually decreased with the increase of Cd stress content, and only the T1 was higher than that of the CK, while the flat stage showed the opposite trend (Fig.…”

“…Most of the previous reports have found the content of soluble sugar in the body increased under heavy metals stress 35,40 . For example, With the increase of Cd concentration, polysaccharides of A. brasiliensis strain J1 showed an upward trend with a significant difference compared with the control treatment, which indicated that Cd concentration might promote the accumulation of polysaccharides of J1 38 .…”

The Impact of High Temperatures in the Field on Leaf Tissue Structure in Different Grape Cultivars

“…The most obvious sign of a plant response to heat stress is the change in the tissue structure of grapevine leaves. When evaluating how well various grapevine genetic resources can withstand heat, this method is frequently applied as one of the evaluation indicators of the extent of high temperature damage to the plant [3,4]. Leaves, as the Horticulturae 2023, 9, 731 2 of 17 primary organs of land plants, play a crucial role in photosynthesis.…”