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Gamma-Aminobutyric Acid Enhances Cadmium Phytoextraction by Coreopsis grandiflora by Remodeling the Rhizospheric Environment
Huang,Yingqi; Li,Boqun; Chen,Huafang; Li,Jingxian; Xu,Jianchu; Li,Xiong
2023
Source PublicationPLANTS-BASEL
ISSN2223-7747
Volume12Issue:7Pages:1484
AbstractGamma-aminobutyric acid (GABA) significantly affects plant responses to heavy metals in hydroponics or culture media, but its corresponding effects in plant-soil systems remain unknown. In this study, different GABA dosages (0-8 g kg(-1)) were added to the rhizosphere of Coreopsis grandiflora grown in Cd-contaminated soils. Cd accumulation in the shoots of C. grandiflora was enhanced by 38.9-159.5% by GABA in a dose-dependent approach because of accelerated Cd absorption and transport. The increase in exchangeable Cd transformed from Fe-Mn oxide and carbonate-bound Cd, which may be mainly driven by decreased soil pH rather than GABA itself, could be a determining factor responsible for this phenomenon. The N, P, and K availability was affected by multiple factors under GABA treatment, which may regulate Cd accommodation and accumulation in C. grandiflora. The rhizospheric environment dynamics remodeled the bacterial community composition, resulting in a decline in overall bacterial diversity and richness. However, several important plant growth-promoting rhizobacteria, especially Pseudomonas and Sphingomonas, were recruited under GABA treatment to assist Cd phytoextraction in C. grandiflora. This study reveals that GABA as a soil amendment remodels the rhizospheric environment (e.g., soil pH and rhizobacteria) to enhance Cd phytoextraction in plant-soil systems.
Keywordgamma-aminobutyric acid heavy metal phytoextraction soil amendment plant growth-promoting rhizobacteria CHROMIUM STRESS AMINO-ACIDS ACCUMULATION L. PHYTOREMEDIATION AVAILABILITY IMPROVEMENT SPECIATION GROWTH PLANTS
Subject AreaPlant Sciences
DOI10.3390/plants12071484
WOS IDWOS:000970050400001
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Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/75049
Collection中国科学院昆明植物研究所
Recommended Citation
GB/T 7714
Huang,Yingqi,Li,Boqun,Chen,Huafang,et al. Gamma-Aminobutyric Acid Enhances Cadmium Phytoextraction by Coreopsis grandiflora by Remodeling the Rhizospheric Environment[J]. PLANTS-BASEL,2023,12(7):1484.
APA Huang,Yingqi,Li,Boqun,Chen,Huafang,Li,Jingxian,Xu,Jianchu,&Li,Xiong.(2023).Gamma-Aminobutyric Acid Enhances Cadmium Phytoextraction by Coreopsis grandiflora by Remodeling the Rhizospheric Environment.PLANTS-BASEL,12(7),1484.
MLA Huang,Yingqi,et al."Gamma-Aminobutyric Acid Enhances Cadmium Phytoextraction by Coreopsis grandiflora by Remodeling the Rhizospheric Environment".PLANTS-BASEL 12.7(2023):1484.
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