| Autor: |
Zhang H; Research Center of Henan Provincial Agricultural Biomass Resource Engineering and Technology, Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China., Sun J; Research Center of Henan Provincial Agricultural Biomass Resource Engineering and Technology, Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China., Yang HY; Research Center of Henan Provincial Agricultural Biomass Resource Engineering and Technology, Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China., Dong LZ; Research Center of Henan Provincial Agricultural Biomass Resource Engineering and Technology, Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China., Hua ZW; Research Center of Henan Provincial Agricultural Biomass Resource Engineering and Technology, Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China., Han H; Research Center of Henan Provincial Agricultural Biomass Resource Engineering and Technology, Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China., Chen ZJ; School of Water Resources and Environmental Engineering, Nanyang Normal University, Nanyang 473061, China. |
| Jazyk: |
čínština |
| Zdroj: |
Huan jing ke xue= Huanjing kexue [Huan Jing Ke Xue] 2023 May 08; Vol. 44 (5), pp. 2955-2964. |
| DOI: |
10.13227/j.hjkx.202205332 |
| Abstrakt: |
Plastic mulch, especially polyethylene mulch, is widely used in agricultural production in China, but the microplastics formed by its degradation gradually have accumulated in soil, causing a series of environmental problems. At present, there have been many reports on the environmental biological effects of microplastics in farmland soil, but studies on the effects of microplastics on crop growth, disease occurrence, and rhizosphere soil bacterial communities are still lacking. In the previous study, it was found that 1% high-density polyethylene (HDPE, 500 mesh) could increase the incidence rate of cotton Fusarium wilt (33.3%) and inhibit growth, but this phenomenon was not found after soil sterilization. It was speculated that HDPE could affect the growth and occurrence of Fusarium wilt by regulating the soil microbial community. Therefore, high-throughput sequencing technology, combined with network and FAPROTAX function analysis, were used to investigate the effects of HDPE on the bacterial community structure, interaction network, and soil function in cotton rhizosphere in order to analyze the mechanism of HDPE. NovaSeq sequencing showed that the bacterial community of HDPE-treated cotton rhizosphere soil was composed of 54 phyla and 472 genera; the number of phyla and genera was higher than that in untreated soil. The α and β diversity and ANOSIM/Adonis analyses showed that HDPE significantly reduced the richness of the bacterial community and changed the composition of the community structure. Based on a T -test species difference analysis, HDPE significantly reduced the relative abundance of bacteria with biological control, pollutant degradation, and antifungal drug synthesis (such as Kribbella , Massiliam , Hailiangium , and Ramlibacter ).The change in the bacterial community will lead to the change in soil bacterial function. Further analysis of FAPROTAX function revealed that HDPE weakened some biochemical functions of bacteria in the cotton rhizosphere soil, such as aerobic chemoheterotrophy, fermentation, and nitrate reduction. The correlation network at the genus level showed that HDPE treatment weakened the interaction between rhizosphere bacteria, reduced the number of positive correlation connections, increased the number of negative correlation connections, simplified network structure, and changed the key flora. The above results showed that HDPE could reduce the cotton growth and the occurrence of Fusarium wilt by changing the bacterial community, interaction, and functional metabolism in rhizosphere soil, which can provide guidance for evaluating the ecological risk of polyethylene microplastics and the remediation of contaminated soil. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
