Modulation of rhizosphere microbial community and metabolites by bio-functionalized nanoscale silicon oxide alleviates cadmium-induced phytotoxicity in bayberry plants
文献类型： 外文期刊
作者： Ahmed, Temoor 1 ; Shou, Linfei 3 ; Guo, Junning 2 ; Noman, Muhammad 4 ; Qi, Yetong 1 ; Yao, Yanlai 1 ; Masood, Hafiza Ayesha 5 ; Rizwan, Muhammad 7 ; Ali, Md. Arshad 8 ; Ali, Hayssam M. 9 ; Li, Bin 2 ; Qi, Xingjiang 1 ;
作者机构： 1.Xianghu Lab, Hangzhou 311231, Peoples R China
2.Zhejiang Univ, Inst Biotechnol, State Key Lab Rice Biol & Breeding, Minist Agr,Key Lab Mol Biol Crop Pathogens & Insec, Hangzhou 310058, Peoples R China
3.Stn Plant Protect & Quarantine & Control Agrochem, Hangzhou 310004, Peoples R China
4.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China
5.Univ Agr Faisalabad, Dept Plant Breeding & Genet, Faisalabad 38000, Pakistan
6.Middle East Univ, MEU Res Unit, Amman, Jordan
7.Govt Coll Univ Faisalabad, Dept Environm Sci, Faisalabad 38000, Pakistan
8.Univ Malaysia Sabah, Fac Sci & Nat resources, Biotechnol Programme, Jalan UMS, Kota Kinabalu 88400, Sabah, Malaysia
9.King Saud Univ, Coll Sci, Dept Bot & Microbiol, Riyadh 11451, Saudi Arabia
10.Zhejiang Acad Agr Sci, Hangzhou 310021, Peoples R China
关键词： Antioxidants; Biogenic nanoparticles; Bacterial community; Heavy metals; Metabolomics; Silicon
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）
ISSN： 0048-9697
年卷期： 2024 年 933 卷
页码：
收录情况： SCI
摘要： Cadmium (Cd) is an extremely toxic heavy metal that can originate from industrial activities and accumulate in agricultural soils. This study investigates the potential of biologically synthesized silicon oxide nanoparticles (Bio-SiNPs) in alleviating Cd toxicity in bayberry plants. Bio-SiNPs were synthesized using the bacterial strain Chryseobacterium sp. RTN3 and thoroughly characterized using advanced techniques. A pot experiment results demonstrated that Cd stress substantially reduced leaves biomass, photosynthesis efficiency, antioxidant enzyme activity, and induced oxidative damage in bayberry (Myrica rubra) plants. However, Bio-SiNPs application at 200 mg kg(-1) significantly enhanced plant biomass, chlorophyll content (26.4 %), net photosynthetic rate (8.6 %), antioxidant enzyme levels, and mitigated reactive oxygen species production under Cd stress. Bio-SiNPs modulated key stress-related phytohormones by increasing salicylic acid (13.2 %) and abscisic acid (13.7 %) contents in plants. Bio-SiNPs augmented Si deposition on root surfaces, preserving normal ultrastructure in leaf cells. Additionally, 16S rRNA gene sequencing demonstrated that Bio-SiNPs treatment favorably reshaped structure and abundance of specific bacterial groups (Proteobacteria, Actinobacteriota, and Acidobacteriota) in the rhizosphere. Notably, Bio-SiNPs application significantly modulated the key metabolites (phenylacetaldehyde, glycitein, maslinic acid and methylmalonic acid) under both normal and Cd stress conditions.
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