Rhizospheric microbiomics integrated with plant transcriptomics provides insight into the Cd response mechanisms of the newly identified Cd accumulator Dahlia pinnata

doi:10.3389/fpls.2022.1091056

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	Rhizospheric microbiomics integrated with plant transcriptomics provides insight into the Cd response mechanisms of the newly identified Cd accumulator Dahlia pinnata
	Li, Xiong; Li, Boqun; Jin, Tao; Chen, Huafang; Zhao, Gaojuan; Qin, Xiangshi; Yang, Yongping; Xu, Jianchu
	2022
发表期刊	FRONTIERS IN PLANT SCIENCE
卷号	13 页码:1091056
摘要	Phytoremediation that depends on excellent plant resources and effective enhancing measures is important for remediating heavy metal-contaminated soils. This study investigated the cadmium (Cd) tolerance and accumulation characteristics of Dahlia pinnata Cav. to evaluate its Cd phytoremediation potential. Testing in soils spiked with 5-45 mg kg(-1) Cd showed that D. pinnata has a strong Cd tolerance capacity and appreciable shoot Cd bioconcentration factors (0.80-1.32) and translocation factors (0.81-1.59), indicating that D. pinnata can be defined as a Cd accumulator. In the rhizosphere, Cd stress (45 mg kg(-1) Cd) did not change the soil physicochemical properties but influenced the bacterial community composition compared to control conditions. Notably, the increased abundance of the bacterial phylum Patescibacteria and the dominance of several Cd-tolerant plant growth-promoting rhizobacteria (e.g., Sphingomonas, Gemmatimonas, Bryobacter, Flavisolibacter, Nocardioides, and Bradyrhizobium) likely facilitated Cd tolerance and accumulation in D. pinnata. Comparative transcriptomic analysis showed that Cd significantly induced (P < 0.001) the expression of genes involved in lignin synthesis in D. pinnata roots and leaves, which are likely to fix Cd2+ to the cell wall and inhibit Cd entry into the cytoplasm. Moreover, Cd induced a sophisticated signal transduction network that initiated detoxification processes in roots as well as ethylene synthesis from methionine metabolism to regulate Cd responses in leaves. This study suggests that D. pinnata can be potentially used for phytoextraction and improves our understanding of Cd-response mechanisms in plants from rhizospheric and molecular perspectives.
关键词	heavy metal contamination phytoextraction Dahlia pinnata rhizobacteria signal transduction PHYTOREMEDIATION GROWTH L.
DOI	10.3389/fpls.2022.1091056
收录类别	SCI
WOS记录号	WOS:000904915700001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75632
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Li, Xiong,Li, Boqun,Jin, Tao,et al. Rhizospheric microbiomics integrated with plant transcriptomics provides insight into the Cd response mechanisms of the newly identified Cd accumulator Dahlia pinnata[J]. FRONTIERS IN PLANT SCIENCE,2022,13:1091056.
APA	Li, Xiong.,Li, Boqun.,Jin, Tao.,Chen, Huafang.,Zhao, Gaojuan.,...&Xu, Jianchu.(2022).Rhizospheric microbiomics integrated with plant transcriptomics provides insight into the Cd response mechanisms of the newly identified Cd accumulator Dahlia pinnata.FRONTIERS IN PLANT SCIENCE,13,1091056.
MLA	Li, Xiong,et al."Rhizospheric microbiomics integrated with plant transcriptomics provides insight into the Cd response mechanisms of the newly identified Cd accumulator Dahlia pinnata".FRONTIERS IN PLANT SCIENCE 13(2022):1091056.

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