第35卷，第5期 2015年5月
光谱学与光谱分析 Spectroscopy and Spectral Analysis
Vol.35,No.5-pp1398-1403
May.2015
ICP-AESDeterminationofMineralContentinBoletusTomentipes
CollectedfromDifferent Sites of China WANG Xue-mei', ZHANG Ji’, LI Tao",LI Jie-qing"
WANG Yuan-zhong
LIUHong-gao
1. College of Agronomy and Biotechnology, Yunnan Agricultural University , Kunming650201 , China 2. Institute of Medicinal Plants , Yunnan Academy of Agricultural Sciences , Kunming650200 , China 3. College of Resources and Environment, Yuxi Normal University , Yuxi 653100 , China
Abstract P, Na, Ca, Cu, Fe, Mg , Zn, As , Cd, Co, Cr and Ni contents have been examined in caps and sti-pes of Boletus tomentipes collected from different sites of Yunnan province , southwest China . The elements were determined using inductively coupled plasma atomic emission spectroscopy (ICP-AES ) with microwave digestion . P, Ca, Mg , Fe , Zn and Cu were the most abundant amongst elements determined in Boletus tomen tipes . The caps were richer in P, Mg , Zn and Cd, and the stipes in Ca , Co and Ni. Cluster analysis showed a difference between Puer (BT7 and BT8 ) and other places . The PCA explained about 77% of the total vari-ance , and the minerals differentiating these places were P (PC1) together with Ca, Cu, Fe , Mg + As and Ni, Na (PC2) together with Cd, and Zn (PC3). The results of this study imply that element concentrations of a mushroom are mutative when collected from the different bedrock soil geochemistry .
KeywordsFungi; Elements ; Wild edible mushroom ; Multivariate analysis ; Bedrock geochemistry
中图分类号：0657.3
Introduction
文献标识码：A
DOI : 10. 3964 /j. issn. 1000-0593 (2015 )05-1398-06
element cyeling and transformationslo123. They are able to accumulate significant amounts of macro- and micro-elements that are beneficial to their consumers(13-15] . Elevated content
Mushrooms are highly appreciated for their nutrition val-ue and medicinal properties as well as for aroma and delicate
texture worldwidel-]
Nevertheless, edible wild-grown
mushrooms have been preferred to cultivated species for their unique flavor characteristics, natural regional features and mineral element contents[5.6]. The consumption of edible wild-grown mushroom is 5 .6 kg of fresh per household yearly in Czech Republic and 2. 5 kg per capita in the United States while higher value was found to be 20~24 kg in Liangshan Yi nationality , China[7-9]
Edible wild-grown mushroom play an important role in Received : 2014-07-13 ; accepted : 2014-10-19
of toxic metals such as As, Hg, Cd and Pb can be found in mushrooms collected from smelters or roadsides[16.17] , Ele-ment content of mushroom is generally affected by environ-mental factors , species , trophic pattern , age of fruiting body and size of less importancel18.0. Recently numerous studies were carried out on mineral constituents in edible wild-grown mushrooms collected from different ecological environments . Researches have shown the correlation between mineral con-centration and different soil bedrock geochemistry , for exam-ple mushrooms growing in serpentine sites contained higher Cd, Cr and Ni than those from volcanic sites[20-22]
Foundation item: the National Natural Science Foundation of China (31260496 , 31160409), the Yunnan Provincial Natural Science Foundation
(2011FB053, 2011FZ195 ), and the Science Foundation of the Yunnan Province Department of Education (2012Y380, 2013Z074)
Biography : WANG Xue-mei, (1987—), a postgraduate student in School of Agronomy and Biotechnology , Yunnan Agricultural University
e-mail : wxm1123520@ 163.com
Corresponding authors
e-mail : boletus@ 126 .com ; honggaoliu@ 126 .com