NDLI: The effect of nitrate assimilation deficiency on the carbon and nitrogen status of Arabidopsis thaliana plants

Content Provider	Springer Nature Link
Author	Santos Filho, Plínio Rodrigues Saviani, Elzira Elisabeth Salgado, Ione Oliveira, Halley Caixeta
Copyright Year	2014
Abstract	Carbon (C) and nitrogen (N) metabolism are integrated processes that modulate many aspects of plant growth, development, and defense. Although plants with deficient N metabolism have been largely used for the elucidation of the complex network that coordinates the C and N status in leaves, studies at the whole-plant level are still lacking. Here, the content of amino acids, organic acids, total soluble sugars, starch, and phenylpropanoids in the leaves, roots, and floral buds of a nitrate reductase (NR) double-deficient mutant of Arabidopsis thaliana (nia1 nia2) were compared to those of wild-type plants. Foliar C and N primary metabolism was affected by NR deficiency, as evidenced by decreased levels of most amino acids and organic acids and total soluble sugars and starch in the nia1 nia2 leaves. However, no difference was detected in the content of the analyzed metabolites in the nia1 nia2 roots and floral buds in comparison to wild type. Similarly, phenylpropanoid metabolism was affected in the nia1 nia2 leaves; however, the high content of flavonol glycosides in the floral buds was not altered in the NR-deficient plants. Altogether, these results suggest that, even under conditions of deficient nitrate assimilation, A. thaliana plants are capable of remobilizing their metabolites from source leaves and maintaining the C–N status in roots and developing flowers.
Starting Page	1121
Ending Page	1129
Page Count	9
File Format	PDF
ISSN	09394451
Journal	Amino Acids
Volume Number	46
Issue Number	4
e-ISSN	14382199
Language	English
Publisher	Springer Vienna
Publisher Date	2014-01-28
Publisher Place	Vienna
Access Restriction	Subscribed
Subject Keyword	Amino acid Carbon–nitrogen status Flavonol glycosides Nitrate reductase Source–sink interaction Biochemistry Analytical Chemistry Biochemical Engineering Life Sciences Proteomics Neurobiology
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Clinical Biochemistry

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