Enantiomeric separation of free L-and D- amino acids in hydrolyzed protein fertilizers by CE-MS2

Hydrolyzed protein fertilizers (HPFs) are obtained mainly by chemical hydrolysis, or through enzymatic hydrolysis, and they typically contain free amino acids, oligo- and poly-peptides.During the chemical hydrolysis, strong agents (acids or alkali) and high temperatures are used which should produce the L-amino acids racemization to their mirror image configuration leading to a loss in their biological activity.In the search for processes that do not induce racemization, enzymatic hydrolysis...

Enantiomeric separation of Free L- and D-Amino Acids in Hydrolyzed Protein Fertilizers by Capillary Electrophoresis Tandem Mass Spectrometry

L-amino acids play a part in many physiological processes in plants. However, while L-amino acids are biologically active, the metabolism role of D-amino acids in plants is still doubtful, and the few existing studies on this topic indicate undesired agronomic effects. The enantiomeric separation of free amino acids contained in different hydrolyzed protein fertilizers used as biostimulants was achieved. Two capillary electrophoresis-tandem mass spectrometry (CE-MS2) methods were optimized i...

Terra-Sorb Foliar®, an amino acid based-biostimulant, mitigates the effects of glyphosate by triggering defence responses in glyphosate-resistant soybeans

The production of glyphosate-resistant (GR) soybeans continues to increase, as does the frequency of use of the herbicide glyphosate. Although largely resistant to glyphosate, GR soybean plants can still suffer adverse effects caused by the application of the herbicide particularly under stress conditions, risking limitations both on crop production and on the quality of the soybean crop. Glyphosate-induced effects on GR soybeans include decreased chlorophyll contents, lower photosynthesis a...

1st World Congress on the use of Biostimulants in Agriculture

6th International Table grape Symposium

Terra-Sorb® is a commercial product based on a mixture of all biologically active L-amino acids which proceed from enzymatic hydrolysis for agriculture use by foliar application (Bioiberica, 2009). Spain is one of the main table grape producers in Europe with excellent cultivars seeded and seedless. Among these, ‘Crimson’ and ‘Autumn Royal’ are within the most cultivated and exported.Although application of amino acids has been evaluated in some crops, there is no scientific informa...