Synthesis of Copper-Chelates Derived from Amino Acids and Evaluation of Their Efficacy as Copper Source and Growth Stimulator for Lactuca sativa in Nutrient Solution Culture

Journal of Agricultural and Food Chemistry
Narongpol KaewchangwatKhomson Suttisintong

Abstract

Five tetradentate ligands were synthesized from l-amino acids and utilized for the synthesis of Cu(II)-chelates 1-5. The efficacy of Cu(II)-chelates as copper (Cu) source and growth stimulator in hydroponic cultivation was evaluated with Lactuca sativa. Their stability test was performed at pH 4-10. The results suggested that Cu(II)-chelate 3 is the most pH tolerant complex. Levels of Cu, Zn, and Fe accumulated in plants supplied with Cu(II)-chelates were compared with those supplied with CuSO4 at the same Cu concentration of 8.0 μM. The results showed that Cu(II)-chelate 3 significantly enhanced Cu, Zn, and Fe content in shoot by 35, 15, and 48%, respectively. Application of Cu(II)-chelate 3 also improved plant dry matter yield by 54%. According to the results, Cu(II)-chelate 3 demonstrated the highest stimulating effect on plant growth and plant mineral accumulation so that it can be used as an alternative to CuSO4 for supplying Cu in nutrient solutions and enhancing the plant growth.

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Citations

Jun 13, 2020·Chemical Communications : Chem Comm·Grayson J FordSabine L Flitsch
Jan 4, 2021·Environmental Science and Pollution Research International·Marcio Yukihiro KohatsuCamila Neves Lange
Dec 3, 2020·Plant Physiology and Biochemistry : PPB·Seyyedeh Atefeh MousaviRainer Schulin
May 13, 2020·Journal of Agricultural and Food Chemistry·Narongpol KaewchangwatKhomson Suttisintong
Nov 16, 2018·International Journal of Biological Macromolecules·Linlin LiShaotong Jiang

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