Concentration and speciation of arsenic in an insect feeding on the leaves of Pteris vittata  

作　　者：Xiaoming Wan Mei Lei Tongbin Chen 

机构地区：[1]Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China [2]University of Chinese Academy of Sciences,Beijing 100089,China

出　　处：《Soil Ecology Letters》2021年第3期279-287,共9页土壤生态学快报（英文）

基　　金：the National Natural Science Foundation of China(Grant No.42077136);grants from the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2017075).

摘　　要：The development of an effective and green bioinsecticide is a research hotspot.This study demonstrated the possibility of using an arsenic(As)hyperaccumulator as a bioinsecticide.When the As concentration in the Pteris vittata fronds exceeded 138 mg kg^(–1),the larva of the hawk moth(Theretra clotho)displayed apparent preference to lower-As-concentration P.vittata fronds.The As concentration in the larva body was as high as 850 mg kg^(–1).Such high concentration of As in the larva body might have been the case that T.clotho lacks a process to exclude As.The larval frass showed an As concentration of only 1%–4%of that in the larva body.The predominant As species in the larva body and frass was As(III)-SH.The percentage of As(III)-SH was slightly higher in the frass than that in the larval body.Chelation with thiols may be a universal detoxification mechanism for As in both plants and insects.In general,the adoption of P.vittata as a bioinsecticide should be feasible.However,the exact processes to achieve this goal still need further study.The mechanism of different animals to detoxify As is another interesting research topic.

关 键 词：Arsenic speciation BIOINSECTICIDE Hawk moth HERBIVORE HYPERACCUMULATOR 

分 类 号：TQ453.5[化学工程—农药化工]