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1.
Sci Rep ; 8(1): 1956, 2018 01 31.
Artigo em Inglês | MEDLINE | ID: mdl-29386632

RESUMO

China is currently the only country that has commercialized genetically engineered tree species, and this has attracted worldwide attention. As a perennial tree species, transgenic poplar has a long growth cycle and needs to be tested for long-term ecological risks. The main purpose of this study was to explore the ecological safety of perennial transgenic poplars in arthropod community, physical and chemical properties of soil, gene flow, and soil microbial diversity. The study found transgenic poplars could effectively inhibit the number of pests. Moreover, transgenic poplar 741 did not affect the stability of the arthropod community. Studies on the microbial diversity of poplar showed that transgenic poplars did not affect the physical and chemical properties of the soil and the soil microbial community structure. Furthermore, the microbial community structure was obviously affected by location and season. The results showed that a 5-year-old transgenic 741 poplar did not pose an ecological risk, and did not affect the microbial community structure or functional diversity. This study provides a reference for the ecological security evaluation of transgenic poplars, and provides a theoretical basis for promoting the commercialization of transgenic poplars.


Assuntos
Artrópodes/fisiologia , Bacillus thuringiensis/fisiologia , Biodiversidade , Populus/genética , Populus/parasitologia , Microbiologia do Solo , Animais , Análise Discriminante , Fluxo Gênico , Plantas Geneticamente Modificadas , Análise de Componente Principal , RNA Ribossômico 16S/genética , Solo/química , Especificidade da Espécie , Transgenes
2.
Ying Yong Sheng Tai Xue Bao ; 17(3): 472-6, 2006 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-16724745

RESUMO

Employing community character indices and canonical correlation analysis, this paper studied the insect communi structure and its relationship with the occurrence degree of Ceroplastes japonicus in jujube orchards. The results showed that based on the community discrepancy coefficient of 0.20, the insect community in various sampling fields could be categorized into two groups, i. e. , plain and hill. The occurrence of C. japonicus in plain region was heavier, with lower insect community diversity, smaller species number, and higher dominance of phytophagous insects, while that in hill region was lighter, with higher insect community diversity, more abundant species, and higher dominance of natural enemy insects. Canonical correlation analysis indicated that at the significant level of 0.05, the first and second pairs of canonical correlation coefficients of C. japonicus occurrence characters and insect community characters were 0. 9904 and 0.8538, respectively, suggesting that the occurrence of C.japonicus was significantly correlated with the characters of insect community. Community diversity (with the coefficient of 3. 4893), species number (with the coefficient of 5.8060), and dominance (with the coefficient of 6.9353) had most important effects on the occurrence of C. japonicus.


Assuntos
Biodiversidade , Insetos/fisiologia , Comportamento Predatório/fisiologia , Ziziphus/parasitologia , Animais , Controle de Insetos , Dinâmica Populacional
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