Degradation of proteins by enzymes exuded by Allium porrum roots-A potentially important strategy for acquiring organic nitrogen by plants (Record no. 45569)

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control field 20250625140648.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-11348
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Title Degradation of proteins by enzymes exuded by Allium porrum roots-A potentially important strategy for acquiring organic nitrogen by plants
490 0# - SERIES STATEMENT
Volume/sequential designation Plant Physiology and BioChemistry, 47(10), p.919-925, 2009
520 3# - SUMMARY, ETC.
Summary, etc. Nitrogen is one of the crucial elements that regulate plant growth and development. It is well-established that plants can acquire nitrogen from soil in the form of low-molecular-mass compounds, namely nitrate and ammonium, but also as amino acids. Nevertheless, nitrogen in the soil occurs mainly as proteins or proteins complexed with other organic compounds. Proteins are believed not to be available to plants. However, there is increasing evidence to suggest that plants can actively participate in proteolysis by exudation of proteases by roots and can obtain nitrogen from digested proteins. To gain insight into the process of organic nitrogen acquisition from proteins by leek roots (Allium porrum L. cv. Bartek), casein, bovine serum albumin and oxidized B-chain of insulin were used; their degradation products, after exposure to plant culture medium, were studied using liquid chromatography-mass spectrometry (LC-MS). Casein was degraded to a great extent, but the level of degradation of bovine serum albumin and the B-chain of insulin was lower. Proteases exuded by roots cleaved proteins, releasing low-molecular-mass peptides that can be taken up by roots. Various peptide fragments produced by digestion of the oxidized B-chain of insulin suggested that endopeptidase, but also exopeptidase activity was present. After identification, proteases were similar to cysteine protease from Arabidopsis thaliana. In conclusion, proteases exuded by roots may have great potential in the plant nitrogen nutrition.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element ORGANIC NITROGEN
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element PLANT NITROGEN NUTRITION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element PLANT ROOTS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element PROTEASE EXUDATION
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Adamczyk, B.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Godlewski, M.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Smolander, A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Kitunen, V.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/13V0r1P_bIliEC8kQtSv0plS0DxKOtYR6/view?usp=drivesdk">https://drive.google.com/file/d/13V0r1P_bIliEC8kQtSv0plS0DxKOtYR6/view?usp=drivesdk</a>
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