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Antimicrobial activity of titanium ion of variable valence with light energy(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2016 06
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Antimicrobial activity of titanium ion of variable valence with light energy
FAN Yanfen1 2 WEI Chunmei1 2 LI Caixia1 WANG Lei3 LI Xinyu3 MA Xinrong1**
1Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China 2University of Chinese Academy of Sciences, Beijing 100049, China 3College of Life Sciences, Sichuan Normal University, Chengdu 610101, China
titanium ion of variable valence with light energy (TIVL) bacteria plant-pathogenic bacteria antibacterial activity bactericide reduction

The overuse of agrochemicals in our country over the years has caused serious environmental problems and brought in an increasing concern on agricultural product quality and safety. Titanium ion of variable valence with light energy (TIVL), an environmentally friendly reagent, could effectively reduce the incidences of various crop diseases and alleviate diseases symptoms caused by pathogens. However, its bacteriostatic activity has not yet been studied. In this research, the plate smearing method was utilized to investigate the bacteriostatic activity of TIVL against Escherichia coli, Streptomyces rochei, Agrobacterium tumefaciens, Pantoe agglomerans and Ralstonia solanacearum. The results showed that 16 mg/L TIVL significantly inhibited bacterial colonization and growth (at a certain concentration of bacteria 2 × 103 - 104 CFU/mL). At the concentration of 4 mg/L, TIVL effectively inhibited 97.33% S. rochei, and at 8 mg/L, it inhibited 99.15% E. coli and 89.16% A. tumefacien, while at 16 mg/L, it suppressed P. agglomerans and R. solanacearum at 87.68% and 74.06% respectively. The results exhibited that TIVL has a significant inhibitory effect on multiple strains of bacteria at low concentrations which suggested TIVL had a broad spectrum of bacteriostatic activity. This study provides a basis for further research on the antibacterial mechanism and application of TIVL, and indicates that TIVL can potentially be a new environmentally friendly bactericide for crop cultivation.


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