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Effects of Potassium Fertilization Application on Microbial Community and Transcriptome in Sugarcane Tillering Stages

文献类型： 外文期刊

作者： Zhang, Zhongfu 1 ; Dao, Jingmei 1 ; Wang, Yutong 1 ; Ai, Jing 1 ; Liu, Jiayong 1 ; Deng, Jun 1 ; Zhao, Yong 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Natl Key Lab Trop Crop Biol Breeding, Kunming 650000, Peoples R China

2.Yunnan Acad Agr Sci, Sugarcane Res Inst, Kaiyuan 661699, Yunnan, Peoples R China

关键词： Sugarcane; Potassium fertilizer; Root endophyte microorganism; Sugarcane transcriptome; Metabolic pathway

期刊名称：TROPICAL PLANT BIOLOGY （ 影响因子：1.4； 五年影响因子：1.7 ）

ISSN： 1935-9756

年卷期： 2025 年 18 卷 1 期

页码：

收录情况： SCI

摘要： Increased potassium application is known to enhance sugar content, drought resistance, and disease resistance in sugarcane, with plant resistance often closely linked to the plant microbiome. However, limited research has been conducted on the changes in root microbial community structure and transcriptome expression following potassium fertilization in sugarcane. To explore the impact of potassium application on sugarcane root microbial characteristics and the transcriptome changes, this study collected sugarcane root samples at the tillering stage under four potassium fertilization gradients. Through analyses of the microbiome, the results showed that appropriate potassium fertilization can influence the retention of soil nutrients in the soil and alter soil enzyme activities. Additionally, potassium fertilization has a significant impact on the microbial community during the tillering stage, Myxococcota, Proteobacteria, Chloroflexi, and Actinobacteriota were enriched at different potassium concentration gradients in bacterial, while Ascomycota, Mortierellomycota, and Basidiomycota were enriched in fungi. Transcriptomic analysis indicated that, compared to the control, at a potassium application rate of 150 kg/hm(2), 3,895 genes were upregulated, and 2,045 genes were downregulated in the sugarcane root transcriptome. Further Gene Ontology (GO) functional annotation showed that potassium application significantly enriched genes related to cellular chemical homeostasis, cellular ion homeostasis, and cellular metal ion homeostasis. Additionally, significant changes were observed in metabolic pathways, including glycerolipid metabolism, phosphatidylinositol signaling system, and alanine, aspartate, and glutamate metabolism. This study provides valuable insights into the ecological mechanisms through which potassium application influences microbial communities and transcriptome gene expression, offering theoretical support for improving nutrient utilization efficiency and promoting sustainable sugarcane production.

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