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- Title
臭氧污染和EDU喷施对小麦叶际细菌群落的影响.
- Authors
苏熠; 程诚; 王琪; 刘园园; 徐彦森; 冯兆忠
- Abstract
In order to study the effects of elevated O3, ethylenediurea (EDU), and their interactions with the phyllospheric microbial community, Triticum aestivum L. Nongmai88 was grown in the China O3 Free-Air Concentration Enrichment (O3-FACE) platform under either ambient atmospheric O3 concentration (A) or 1.5 times ambient atmospheric O3 (E), and the foliage was sprayed with 450 mg·L-1 EDU or water every ten days from March 1st to May 13th. Compared with A treatment, plant height decreased by 9.4% under E treatment, while plant height increased by 11.0% when EDU was sprayed on leaves under E treatment. Based on alpha diversity analysis of the phyllospheric bacterial community, elevated O3, EDU, and their interactions had no significant effect on alpha diversity indices. Both NMDA and PCoA results indicated that the structure of the phyllospheric bacterial community was significantly affected by elevated O3 and EDU, respectively. At the phylum level, the dominant phyllospheric bacteria included Proteobacteria (84.7% - 94.8%) (with Gammaproteobacteria accounting for 75.2% – 94.3%), Bacteroidetes (1.3% – 13.1%), and Firmicutes (1.6% – 5.4%) . Under E treatment, EDU significantly reduced the relative abundance of Gammaproteobacteria and increased the relative abundance of Bacteroidetes compared with the control group (water treatment) . In addition, the relative abundance of the abundant genera also changed significantly. Compared with A treatment, E significantly decreased the relative abundance of Pseudomonas and Serratia by 50.6%–57.2% and 41.4%– 65.5%, respectively. Under E treatment, EDU reduced the relative abundance of Erwinia by 73.0% compared with the control group. In conclusion, both elevated O3 and EDU change the phyllospheric bacterial community structure of wheat plants, although they have no effect on alpha -diversity. EDU may improve the tolerance of wheat to O3 stress by increasing the abundance of environmentally adaptable microbiota. In order to study the effects of elevated O3, ethylenediurea (EDU), and their interactions with the phyllospheric microbial community, Triticum aestivum L. Nongmai88 was grown in the China O3 Free-Air Concentration Enrichment (O3-FACE) platform under either ambient atmospheric O3 concentration (A) or 1.5 times ambient atmospheric O3 (E), and the foliage was sprayed with 450 mg·L-1 EDU or water every ten days from March 1st to May 13th. Compared with A treatment, plant height decreased by 9.4% under E treatment, while plant height increased by 11.0% when EDU was sprayed on leaves under E treatment. Based on alpha diversity analysis of the phyllospheric bacterial community, elevated O3, EDU, and their interactions had no significant effect on alpha diversity indices. Both NMDA and PCoA results indicated that the structure of the phyllospheric bacterial community was significantly affected by elevated O3 and EDU, respectively. At the phylum level, the dominant phyllospheric bacteria included Proteobacteria (84.7% - 94.8%) (with Gammaproteobacteria accounting for 75.2% – 94.3%), Bacteroidetes (1.3% – 13.1%), and Firmicutes (1.6% – 5.4%) . Under E treatment, EDU significantly reduced the relative abundance of Gammaproteobacteria and increased the relative abundance of Bacteroidetes compared with the control group (water treatment) . In addition, the relative abundance of the abundant genera also changed significantly. Compared with A treatment, E significantly decreased the relative abundance of Pseudomonas and Serratia by 50.6%–57.2% and 41.4%– 65.5%, respectively. Under E treatment, EDU reduced the relative abundance of Erwinia by 73.0% compared with the control group. In conclusion, both elevated O3 and EDU change the phyllospheric bacterial community structure of wheat plants, although they have no effect on alpha -diversity. EDU may improve the tolerance of wheat to O3 stress by increasing the abundance of environmentally adaptable microbiota.
- Subjects
CHINA; BACTERIAL communities; WATER purification; MICROBIAL communities; PLANT anatomy; BACTEROIDETES; ERWINIA; WHEAT
- Publication
Journal of Agro-Environment Science, 2023, Vol 42, Issue 5, p984
- ISSN
1672-2043
- Publication type
Article
- DOI
10.11654/jaes.2022-0792