PMID- 35424848
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220416
IS  - 2046-2069 (Electronic)
IS  - 2046-2069 (Linking)
VI  - 12
IP  - 15
DP  - 2022 Mar 21
TI  - Effects of rice root exudates on aggregation, dissolution and bioaccumulation of 
      differently-charged Ag nanoparticles.
PG  - 9435-9444
LID - 10.1039/d2ra00229a [doi]
AB  - The biological toxicity and eco-environmental risk of metal nanoparticles (MNPs) 
      is closely related to their stability. The stability of MNPs not only depends on 
      their own properties but also on the effects of biological and environmental 
      factors. To better understand the interaction between biological factors and MNPs 
      in aquatic environments, the effects of total rice root exudates (T-RRE) on the 
      aggregation, dissolution and bioaccumulation of Ag nanoparticles (AgNPs) with 
      different surface charges were investigated in detail. Results indicated that 
      T-RRE can induce the aggregation and sedimentation, and hinder the dissolution of 
      polyethyleneimine-coated AgNPs (AgNPs@PEI) with positive surface charges as well 
      as reducing the bioaccumulation of Ag in rice roots. T-RRE had no obvious effect 
      on the dispersion stability of AgNPs@Cit (negatively charged citrate-coated 
      AgNPs) and AgNPs@PVP (near electrically neutral polyvinylpyrrolidone-coated 
      AgNPs), although T-RRE could induce the dissolution of AgNPs@Cit and AgNPs@PVP. 
      In the molecular fractions of T-RRE, high-molecular-weight root exudates (H-RRE) 
      play a key role in inducing the aggregation of AgNPs@PEI and hindering the 
      bioaccumulation of Ag in rice roots. Compared with H-RRE, low-molecular-weight 
      root exudates (L-RRE) can promote the dissolution of AgNPs@Cit and AgNPs@PVP, but 
      it can obviously promote silver accumulation in rice roots. The difference in 
      charge intensity between L-RRE and T-RRE plays a key role in inducing the 
      aggregation and dissolution of AgNPs with different charges. These findings 
      provide a foundation for investigation of the interactions between rice root 
      exudates and nanoparticles with different surface charges in complex 
      environmental systems.
CI  - This journal is (c) The Royal Society of Chemistry.
FAU - Yang, Jiajia
AU  - Yang J
AD  - School of Life Science, Shanxi Normal University Taiyuan 030000 China 
      jjyang2009@126.com zzfsx2012@126.com +86-0351-2051196.
FAU - Duan, Hongyu
AU  - Duan H
AD  - School of Life Science, Shanxi Normal University Taiyuan 030000 China 
      jjyang2009@126.com zzfsx2012@126.com +86-0351-2051196.
FAU - Wang, Xiya
AU  - Wang X
AD  - School of Life Science, East China Normal University Shanghai 200241 China.
FAU - Zhang, Huan
AU  - Zhang H
AD  - School of Life Science, Shanxi Normal University Taiyuan 030000 China 
      jjyang2009@126.com zzfsx2012@126.com +86-0351-2051196.
FAU - Zhang, Zhifeng
AU  - Zhang Z
AUID- ORCID: 0000-0001-8997-6349
AD  - School of Life Science, Shanxi Normal University Taiyuan 030000 China 
      jjyang2009@126.com zzfsx2012@126.com +86-0351-2051196.
LA  - eng
PT  - Journal Article
DEP - 20220325
PL  - England
TA  - RSC Adv
JT  - RSC advances
JID - 101581657
PMC - PMC8985187
COIS- The authors declare no competing financial interests.
EDAT- 2022/04/16 06:00
MHDA- 2022/04/16 06:01
PMCR- 2022/03/25
CRDT- 2022/04/15 05:29
PHST- 2022/01/12 00:00 [received]
PHST- 2022/03/19 00:00 [accepted]
PHST- 2022/04/15 05:29 [entrez]
PHST- 2022/04/16 06:00 [pubmed]
PHST- 2022/04/16 06:01 [medline]
PHST- 2022/03/25 00:00 [pmc-release]
AID - d2ra00229a [pii]
AID - 10.1039/d2ra00229a [doi]
PST - epublish
SO  - RSC Adv. 2022 Mar 25;12(15):9435-9444. doi: 10.1039/d2ra00229a. eCollection 2022 
      Mar 21.