The effects of pesticides on bacterial nitrogen fixers in peanut-growing area

被引：24

作者：

Angelini, Jorge ^{[1
]}

Silvina, Ghio ^{[1
]}

Taurian, Tania ^{[1
]}

Ibanez, Fernando ^{[1
]}

Laura Tonelli, Maria ^{[1
]}

Valetti, Lucio ^{[1
]}

Soledad Anzuay, Maria ^{[1
]}

Luduena, Liliana ^{[1
]}

Munoz, Vanina ^{[1
]}

Fabra, Adriana ^{[1
]}

机构：

[1] Univ Nacl Rio Cuarto, Dept Ciencias Nat, Fac Ciencias Exactas Fis Quim & Nat, RA-5800 Cordoba, Argentina

来源：

ARCHIVES OF MICROBIOLOGY | 2013年 / 195卷 / 10-11期

关键词：

Peanut; Pesticides; Soil diazotrophs; nifH; SOIL; FIXATION; MICROORGANISMS; DIVERSITY; INFECTION; ROOTS; STATE; FIELD; DNA;

D O I：

10.1007/s00203-013-0919-1

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

In the peanut production, the applications of herbicides and fungicides are a common practice. In this work, studies done under field conditions demonstrated that pesticides affected negatively the number and nitrogenase activity of diazotrophic populations of soil. Agrochemical effects were not transient, since these parameters were not recovered to pre-treatment levels even 1 year after pesticides application. Results obtained from greenhouse experiments revealed that the addition of herbicide or fungicides diminished the free-living diazotrophs number reaching levels found in soil amended with the pesticides and that the number of symbiotic diazotrophs was not affected by the insecticide assayed. The soil nitrogenase activity was not affected by fungicides and glyphosate. The effect of pesticides on the nitrogen-fixing bacteria diversity was evaluated both in field and greenhouse experiments. Analysis of clone libraries generated from the amplification of soil nifH gene showed a diminution in the genetic diversity of this bacterial community.

引用

页码：683 / 692

页数：10

共 48 条

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