Multi-omics profiling reveals elevated CO 2 -enhanced tolerance of Trifolium repens L. to lead stress through environment-plant-microbiome interactions.

Autor: Wang L; School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China., Wang S; National Key Laboratory of Smart Farm Technologies and Systems, Northeast Agricultural University, Harbin 150030, China., Su H; School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China., Cai H; Jilin Academy of Agricultural Sciences (Northeast Agricultural Research Center of China), Changchun 130033, China., Song Y; School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China., Gong X; School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China., Sun Z; School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China., Qu J; School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China., Zhang Y; School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China. Electronic address: zhangying_neau@163.com.
Jazyk: angličtina
Zdroj: Environment international [Environ Int] 2024 Dec; Vol. 194, pp. 109150. Date of Electronic Publication: 2024 Nov 13.
DOI: 10.1016/j.envint.2024.109150
Abstrakt: The increasing atmospheric CO 2 resulting from human activities over the past two centuries, which is projected to persist, has significant implications for plant physiology. However, our predictive understanding of how elevated CO 2 (eCO 2 ) modifies plant tolerance to metal stress remains limited. In this study, we collected roots and rhizosphere soils from Trifolium repens L. subjected to lead (Pb) stress under ambient and elevated CO 2 conditions, generating transcriptomic data for roots, microbiota data for rhizospheres, and conducting comprehensive multi-omics analyses. Our findings show that eCO 2 reduced the accumulation of Pb-induced reactive oxygen species (ROS) and promoted plant growth by 72% to 402%, as well as increases shoot Pb uptake by 79% compared to ambient CO 2 . Additionally, eCO 2 triggers specific defense response in T. repens, elevating the threshold for stress response. We observed a adaptive reconfiguration of transcriptional network that enhances energy efficiency and optimizes photosynthetic product utilization. Notably, eCO 2 induces salicylic acid biosynthesis and activates defense pathways related to redox balance and ROS scavenging processes, thereby enhancing abiotic stress resistance. Through weighted gene co-expression network analysis, our comprehensive investigation reveals a holistic regulatory network encompassing plant traits, gene expression patterns, and bacterial structure potentially linked to metal accumulation as well as tradeoffs between growth and defense in plants under elevated CO 2 . These insights shed light on the plant stress responses under elevated CO 2 and while contributing to a broader comprehension of plant-environment interactions.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier Ltd.)
Databáze: MEDLINE
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