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Nitrogen deficiency induced changes of free amino acids and coumarin contents in the leaves of Matricaria chamomilla

Abstract

Through o-hydroxycinnamic acids, the biosynthesis of coumarins is connected with aromatic amino acid metabolism and nitrogen uptake. Therefore the quantitative changes in levels of some free amino acids and coumarins (herniarin and its glucosidic precursors (Z) - and (E)-2-β-D-glucopyranosyloxy-4-methoxycinnamic acids; umbelliferone) in the leaf rosettes of chamomile (Matricaria chamomilla L.) subjected to nitrogen deficiency were studied. Nitrogen content decreased in the leaf rosettes and in the roots of N-deficient plants during the course of the experiment, but these plants produced significantly higher root biomass. Among secondary metabolites, the sum of 2-β-D-glucopyranosyloxy-4-methoxycinnamic acids increased sharply, herniarin increased slowly and the content of umbelliferone was low in N-deficient plants. We have concluded that nitrogen deficiency is not an inducing factor for stress accumulation of herniarin and umbelliferone. A decrease in levels of all detected amino acids, besides histidine, was found. Within aromatic amino acids, tyrosine was the most abundant. The content of free phenylalanine was significantly lower in both, control and N-deficient plants when compared to the content of tyrosine. In this view, the increase of herniarin glucosidic precursors is apparently due to enhancing phenylalanine ammonia-lyase activity under nitrogen deficiency and nitrogen-free carbon skeletons are shunted in to the phenylpropanoid metabolism, including biosynthesis of (Z)-and (E)-2-β-D-glucopyranosyloxy-4-methoxycinnamic acids.

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Similar content being viewed by others Explore related subjectsDiscover the latest articles and news from researchers in related subjects, suggested using machine learning. Abbreviations
d. m.:

dry mass

GMCA:

2-β-glucopyranosyloxy-4-methoxycinnamic acids

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Author information Authors and Affiliations
  1. Department of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67, Košice, Slovak Republic

    Jozef Ková ik & Miroslav Rep ák

  2. Institute of Medical Chemistry, Biochemistry and Clinical Biochemistry, Faculty of Medicine, P. J. Šafárik University, Tr. SNP 1, 040 66, Košice, Slovak Republic

    Ivan Korn

Authors
  1. Jozef Ková ik
  2. Miroslav Rep ák
  3. Ivan Korn
Corresponding author

Correspondence to Jozef Ková ik.

About this article Cite this article

Ková ik, J., Rep ák, M. & Korn, I. Nitrogen deficiency induced changes of free amino acids and coumarin contents in the leaves of Matricaria chamomilla . Acta Physiol Plant 28, 159–164 (2006). https://doi.org/10.1007/s11738-006-0042-x

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