摘要
为了解常规与菌根栽培铁皮石斛茎、叶中的矿物元素含量水平变化,为铁皮石斛茎、叶的食用安全性提供依据。对来自江苏、福建、上海、浙江4个地点的7个铁皮石斛样品,分别进行常规栽培、菌根栽培,通过ICP-MS检测茎、叶中17种矿物元素的含量,分析常规栽培、菌根栽培铁皮石斛的污染元素降低、其他矿物元素增加的显著程度,并利用目标风险指数(THQ)方法对茎中的铅(Pb)、镉(Cd)、汞(Hg)、砷(As)进行健康风险评价。结果表明,铁皮石斛茎、叶中污染元素含量均较低,菌根栽培后污染物含量有所降低。铁皮石斛茎及叶中钾(K)、钙(Ca)、镁(Mg)、磷(P)含量较高,菌根栽培对其他元素含量提高有一定作用,但呈现不规律性。通过计算THQ发现,常规与菌根栽培的铁皮石斛茎食用安全性风险较低,且菌根栽培后食用安全性风险更低。该研究提示菌根培养对于铁皮石斛茎、叶中的元素含量水平有一定影响,今后应当深入研究铁皮石斛培养基质和加工工艺对其矿物元素含量的影响,以及不同矿物元素含量增加或降低的作用机制。
This study aims to analyze the variation of the content of mineral elements in stems and leaves of Dendrobium officinale cultivated with conventional method and mycorrhizal fungi, which is expected to lay a basis for safety of stems and leaves of D. officinale. A total of 7 samples from Jiangsu, Fujian, Shanghai, and Zhejiang were collected, which were then cultivated with conventional method and mycorrhizal fungi, separately. The content of 17 mineral elements in stems and leaves was measured by inductively coupled plasma-mass spectrometry(ICP-MS), and the content changes of the mineral elements were analyzed. The health risks of Pb, Cd, Hg, and As in stems were assessed by target hazard quotient(THQ). The results showed that the content of polluting elements in stems and leaves of D. officinale was low, and the content in the plants cultivated with mycorrhizal fungi was reduced. The content of K, Ca, Mg, and P was high in stems and leaves of the species, suggesting that cultivation with mycorrhizal fungi improved the content of other elements irregularly. According to the THQ, the safety risk of stems of D. officinale cultivated with either conventional method or mycorrhizal fungi was low, particularly the D. officinale cultivated mycorrhizal fungi. The results indicated that cultivation with mycorrhizal fungi influenced the element content in stems and leaves of D. officinale. It is necessary to study the culture substrate, processing technology, and the mechanism of the increase or decrease in mineral elements of D. officinale in the future.
作者
王家祺
田丽霞
陈晓梅
郭顺星
WANG Jia-qi;TIAN Li-xia;CHEN Xiao-mei;GUO Shun-xing(Institute of Medicinal Plant Development,Chinese Academy of Medical Science and Peking Union Medical College,Beijing 100193,China)
出处
《中国中药杂志》
CAS
CSCD
北大核心
2022年第21期5824-5831,共8页
China Journal of Chinese Materia Medica
基金
中国医学科学院医学与健康科技创新工程项目(2017-I2M-3-013)。
关键词
铁皮石斛
菌根培养
矿物元素
健康风险评价
Dendrobium officinale
cultivation with mycorrhizal fungi
mineral elements
health risk assessment
