摘要
为了从子实体水平探究重金属铅在基质-食用菌系统的迁移规律,研究利用大球盖菇Strophar-ia rugoso-annulata开展外源铅添加试验,对其基质总铅含量(Pbtotal)和有效态铅含量(Pbavail),以及子实体铅含量(Pb)进行检测分析.结果表明:(1)基质Pbavail 与Pbtotal 之间具有良好的线性关系,随着Pbtotal 增加,Pbavail 增加,Pbavail 在Pbtotal 的占比也增加;(2)大球盖菇子实体的铅含量随基质Pbtotal 和Pbavail 的增加,呈现先增大后减小的趋势;(3)铅从基质向大球盖菇子实体转移的迁移系数TF(TFtotal 和TFavail)随基质Pbtotal 及Pbavail 的增加,先增大后减小.研究揭示了在不同铅浓度条件下,重金属铅从基质向大球盖菇子实体迁移的变化规律,也表明基质的总铅含量及有效态铅含量可作为管控食用菌产品质量安全的有效指标.
Abstract
This study aims to investigate the transfer law of lead from the substrate-to-fungi system at the fruiting body level.An exogenous lead gradient addition test was carried out in Stropharia rugoso-annulata,and the total lead content(Pbtotal)and available lead content(Pbavail)in the substrate,and the lead content in the fruiting body were detected.The results indicated that there was a significant positive correlation between to-tal lead concentration and available lead concentration in substrate.With the increase of Pbtotal and Pbavail in the substrate,the lead content in the fruiting body raised first and then fell.The transfer coefficient of lead(TFtotal and TFavail)from the substrate-to-fungi system showed a trend of increasing first and then decreasing,with the increase of Pbtotal and Pbavail in the substrate.This study revealed the transfer law of lead from the substrate-to-fungi system at the fruiting body level of S.rugoso-annulata under different lead concentrations.The total amount and the available content of heavy metals may be effective indexes to the quality and safety of edible fungi.
基金项目
广东省林业局科研监测项目(2023KJQT001)
NETL
NSTL
万方数据