PMID- 36029971
OWN - NLM
STAT- MEDLINE
DCOM- 20221215
LR  - 20221228
IS  - 2452-0748 (Electronic)
IS  - 2452-0748 (Linking)
VI  - 28
DP  - 2022 Oct
TI  - Silica nanoparticles activate defense responses by reducing reactive oxygen 
      species under Ralstonia solanacearum infection in tomato plants.
PG  - 100418
LID - S2452-0748(22)00040-4 [pii]
LID - 10.1016/j.impact.2022.100418 [doi]
AB  - Silica nanoparticles (SNPs) play an important positive role in enhancing stress 
      resistance of plants. However, their absorption and the mechanisms of resistance 
      in plants are not yet fully understood. In this study, we investigated the uptake 
      of SNPs in tomato plants and explored the physiological and molecular mechanisms 
      of SNPs-mediated bacterial wilt resistance. Folia application of SNPs 
      significantly increased silicon content in tomato leaves and roots by 5.4-fold 
      and 1.8-fold compared with healthy control, respectively. Moreover, 
      foliar-applied SNPs mainly accumulated in the shoots of plants. Interestingly, we 
      found that SNPs significantly reduced wilt severity by 20.71%-87.97%. Under 
      pathogen infection conditions, the Hydrogen peroxide (H(2)O(2)) levels and 
      Malondialdehyde (MDA) content in SNPs treated leaves significantly decreased by 
      16.33%-24.84% and 22.15%-38.54%, respectively, compared to non-treated SNPs 
      leaves. The application of SNPs remarkably increased peroxidase (78.56-157.47%), 
      superoxide dismutase (46.02-51.68%), and catalase (1.59-1.64 fold) enzyme 
      activities, as well as upregulated the expression of salicylic acid-related genes 
      (PR-1, PR-5, and PAL) in tomato leaves. Taken together, our findings demonstrate 
      that SNPs function as important nanoparticles to maintain ROS homeostasis in 
      plants by increasing antioxidant enzyme activity in tomato plants and enhancing 
      plant tolerance to bacterial wilt disease by regulating the expression of 
      salicylic acid-related genes. This study expands our understanding of how plants 
      utilize these nanoparticles to deal with pathogen infection.
CI  - Copyright (c) 2022 Elsevier B.V. All rights reserved.
FAU - Wang, Lei
AU  - Wang L
AD  - Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou 
      510642, China; Key Laboratory of Tropical Agricultural Environment in South 
      China, Ministry of Agriculture, Guangzhou 510642, China; College of Natural 
      Resources and Environment, South China Agricultural University, Guangzhou 510642, 
      China.
FAU - Pan, Taowen
AU  - Pan T
AD  - Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou 
      510642, China; Key Laboratory of Tropical Agricultural Environment in South 
      China, Ministry of Agriculture, Guangzhou 510642, China; College of Natural 
      Resources and Environment, South China Agricultural University, Guangzhou 510642, 
      China.
FAU - Gao, Xuhua
AU  - Gao X
AD  - Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, 
      Guangzhou 510642, China.
FAU - An, Jing
AU  - An J
AD  - College of Agriculture, South China Agricultural University, Guangzhou 510642, 
      China.
FAU - Ning, Chuanchuan
AU  - Ning C
AD  - Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou 
      510642, China; Key Laboratory of Tropical Agricultural Environment in South 
      China, Ministry of Agriculture, Guangzhou 510642, China; College of Natural 
      Resources and Environment, South China Agricultural University, Guangzhou 510642, 
      China.
FAU - Li, Sicong
AU  - Li S
AD  - Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou 
      510642, China; Key Laboratory of Tropical Agricultural Environment in South 
      China, Ministry of Agriculture, Guangzhou 510642, China; College of Natural 
      Resources and Environment, South China Agricultural University, Guangzhou 510642, 
      China.
FAU - Cai, Kunzheng
AU  - Cai K
AD  - Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou 
      510642, China; Key Laboratory of Tropical Agricultural Environment in South 
      China, Ministry of Agriculture, Guangzhou 510642, China; College of Natural 
      Resources and Environment, South China Agricultural University, Guangzhou 510642, 
      China. Electronic address: kzcai@scau.edu.cn.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20220824
PL  - Netherlands
TA  - NanoImpact
JT  - NanoImpact
JID - 101676795
RN  - 7631-86-9 (Silicon Dioxide)
RN  - 0 (Reactive Oxygen Species)
RN  - BBX060AN9V (Hydrogen Peroxide)
RN  - O414PZ4LPZ (Salicylic Acid)
SB  - IM
MH  - *Ralstonia solanacearum
MH  - Silicon Dioxide
MH  - Reactive Oxygen Species
MH  - *Solanum lycopersicum/genetics
MH  - Hydrogen Peroxide
MH  - Salicylic Acid
OTO - NOTNLM
OT  - Ralstonia solanacearum
OT  - Reactive oxygen species
OT  - Salicylic acid-related genes
OT  - Silica nanoparticles
OT  - Tomato
COIS- Declaration of Competing Interest The authors declare no competing financial 
      interest.
EDAT- 2022/08/28 06:00
MHDA- 2022/12/15 06:00
CRDT- 2022/08/27 19:26
PHST- 2022/05/05 00:00 [received]
PHST- 2022/08/05 00:00 [revised]
PHST- 2022/08/15 00:00 [accepted]
PHST- 2022/08/28 06:00 [pubmed]
PHST- 2022/12/15 06:00 [medline]
PHST- 2022/08/27 19:26 [entrez]
AID - S2452-0748(22)00040-4 [pii]
AID - 10.1016/j.impact.2022.100418 [doi]
PST - ppublish
SO  - NanoImpact. 2022 Oct;28:100418. doi: 10.1016/j.impact.2022.100418. Epub 2022 Aug 
      24.