Transcriptome Analysis of Plant Growth-promoting Bacteria Alleviating Microplastic and Heavy Metal Combined Pollution Stress in Sorghum

被引：1
|
作者：
Liu Y.-Q. [1 ]
Zhao S.-Y. [1 ]
Ren X.-M. [2 ]
Li Y.-Y. [1 ]
Zhang Y.-J. [2 ]
Zhang H. [1 ]
Han H. [1 ]
Chen Z.-J. [1 ]
机构：
[1] International Joint Laboratory of Watershed Ecological Security, Collaborative Innovation Center of Water Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, College of Water Resource and Environment E
[2] School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang
来源：
Huanjing Kexue/Environmental Science | 2024年 / 45卷 / 01期
关键词：
cadmium（Cd）; polyethylene（PE）; rhizosphere growth-promoting bacteria; sorghum; transcriptome;
D O I：
10.13227/j.hjkx.202301158
中图分类号：
学科分类号：
摘要：
Microplastics can become potential transport carriers of other environmental pollutants（such as heavy metals），so the combined pollution of microplastics and heavy metals has attracted increasing attention from researchers. To explore the mechanism of plant growth-promoting bacteria VY-1 alleviating the combined pollution stress of heavy metals and microplastics in sorghum，the effects of inoculation on biomass and accumulation of heavy metals in sorghum were analyzed using a hydroponics experiment，and the effects of inoculation on gene expression in sorghum were analyzed via transcriptomics. The results showed that the combined pollution of polyethylene（PE）and cadmium（Cd）decreased the dry weight of above-ground and underground parts by 17. 04% and 10. 36%，respectively，compared with that under the single Cd pollution，which showed that the combined toxicity effect of the combined pollution on plant growth was enhanced. The inoculation of plant growth-promoting bacteria VY-1 could alleviate the toxicity of Cd-PE combined pollution and increase the length of aboveground and underground parts by 33. 83% and 73. 21% and the dry weight by 56. 64% and 33. 44%，respectively. Transcriptome sequencing showed that 904 genes were up-regulated after inoculation with VY-1. Inoculation with growth-promoting bacteria VY-1 could up-regulate the expression of several genes in the auxin，abscisic acid，flavonoid synthesis，and lignin biosynthesis pathways，which promoted the response ability of sorghum under Cd-PE combined pollution stress and improved its resistance. The above results indicated that plant growth-promoting bacteria could alleviate the stress of heavy metal and microplastic combined pollution by regulating plant gene expression，which provided a reference for plant-microbial joint remediation of heavy metal and microplastic combined pollution. © 2024 Science Press. All rights reserved.
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页码：480 / 488
页数：8
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