Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 66, Issue -, Pages 63-67Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2013.02.010
Keywords
Nicotiana tabacum; Abiotic stress; B-6 vitamers; HPLC analysis
Categories
Funding
- National Natural Science Foundation of China [30870338]
- Natural Science Foundation of Education Department of Anhui Province [KJ2010A116]
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There are six different vitamin B-6 (VB6) forms, pyridoxal (PL), pyridoxamine (PM), pyridoxine (PN), pyridoxal 5'-phosphate (PLP), pyridoxamine 5'- phosphate (PMP), and pyridoxine 5'-phosphate (PNP), of which PLP is the active form. Although transcriptional regulation of the genes involved in the de novo and salvage pathways of PLP syntheses after stress treatments has been described for Arabidopsis thaliana and tobacco plants, it remains open as to whether this in turn affects VB6 levels. In this study, the effects of chilling, UV radiation, intensity of illumination, osmotic pressure, oxidative and drought stresses on the abundance of different B-6 vitamers in tobacco plants were examined by using high performance liquid chromatography (HPLC). The abiotic stressors resulted in significant increase of PLP, and caused some corresponding changes with PL and PN. The highest increase of PLP was 2.5-fold compared to the control plants, followed by a continuous decline back to the control levels. These changes are presumably caused by the regulation and control mechanism on the VB6 metabolism in plants. (C) 2013 Elsevier Masson SAS. All rights reserved.
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