Influences of nano-anatase TiO2 on the nitrogen metabolism of growing spinach.
Previous research showed that nano-TiO2 could significantly promote photosynthesis and greatly improve growth of spinach, but we also speculated that an increase of spinach growth by nano-TiO2 treatment might be closely related to the change of nitrogen metabolism. The effects of nanoanatase TiO2 on the nitrogen metabolism of growing spinach were studied by treating them with nano-anatase TiO2. The results showed that nano-anatase TiO2 treatment could obviously increase the activities of nitrate reductase, glutamate dehydrogenase, glutamine synthase, and glutamic-pyruvic transaminase during the growing stage. Nano-anatase TiO2 treatment could also promote spinach to absorb nitrate, accelerate inorganic nitrogen (such as NO3--N and NH4+-N) to be translated into organic nitrogen (such as protein and chlorophyll), and enhance the fresh weight and dry weights.
Yang
Fan
F
College of Life Sciences, Suzhou University, Suzhou-215006, People's Republic of China.
Hong
Fashui
F
You
Wenjuan
W
Liu
Chao
C
Gao
Fengqing
F
Wu
Cheng
C
Yang
Ping
P
D002734:Chlorophyll / Q000378:metabolism; D050901:Nitrate Reductase / Q000378:metabolism; D009566:Nitrates / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism*; D010940:Plant Proteins / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000378:metabolism; D018724:Spinacia oleracea / Q000187:drug effects / Q000201:enzymology / Q000254:growth & development*; D014025:Titanium / Q000378:metabolism / Q000494:pharmacology*
D009566:Nitrates; D010940:Plant Proteins; D000644:Quaternary Ammonium Compounds; D016601:RNA-Binding Proteins; C415086:p67 protein, Raphanus sativus; D002734:Chlorophyll; C009495:titanium dioxide; D014025:Titanium; D050901:Nitrate Reductase; D009584:Nitrogen