Compared with the salt stress group, the rate of O − 2 production in wheat seedlings after treatment with different exogenous substances showed a decreasing trend, among which the COS-G group showed a more obvious decrease of 12.5% ( p < 0.05), indicating that COS-G inhibited the rate of O − 2 production in plants under salt stress to some extent, and the O − 2 content was restored to the normal level.
The exogenous application of COS-G alleviated the inhibitory effect of salt stress on wheat shoot length and root length, and the shoot fresh weight of seedlings showed an increasing trend of 48.9%, which was better than that of the raw materials and SNP.
The NaCl treatment resulted in a highly significant increase in the H 2 O 2 content in wheat seedlings compared to the group without salt stress treatment (CK), as shown in Figure 6 b, which was 43.2% higher than the CK group.