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. 2011 Sep;41(1):19-30.
doi: 10.1007/s00723-011-0233-5. Epub 2011 Jun 9.

Free Radicals, Salicylic Acid and Mycotoxins in Asparagus After Inoculation with Fusarium proliferatum and F. oxysporum

Bernadeta Dobosz, Kinga Drzewiecka, Agnieszka Waskiewicz, Lidia Irzykowska, Jan Bocianowski, Zbigniew Karolewski, Marian Kostecki, Zdzislaw Kruczynski, Ryszard Krzyminiewski, Zbigniew Weber, Piotr Golinski

Free Radicals, Salicylic Acid and Mycotoxins in Asparagus After Inoculation with Fusarium proliferatum and F. oxysporum

Bernadeta Dobosz et al. Appl Magn Reson. 2011 Sep.

Abstract

Electron paramagnetic resonance was used to monitor free radicals and paramagnetic species like Fe, Mn, Cu generation, stability and status in Asparagus officinalis infected by common pathogens Fusarium proliferatum and F. oxysporum. Occurrence of F. proliferatum and F. oxysporum, level of free radicals and other paramagnetic species, as well as salicylic acid and mycotoxins content in roots and stems of seedlings were estimated on the second and fourth week after inoculation. In the first term free and total salicylic acid contents were related to free radicals level in stem (P = 0.010 and P = 0.033, respectively). Concentration of Fe(3+) ions in porphyrin complexes (g = 2.3, g = 2.9) was related to the species of pathogen. There was no significant difference between Mn(2+) concentrations in stem samples; however, the level of free radicals in samples inoculated with F. proliferatum was significantly higher when compared to F. oxysporum.

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Figures

Fig. 1
Fig. 1
EPR spectra of asparagus root (a, b) and stem (c, d) inoculated with F. proliferatum (isolate 06-76sb). FR free radical range
Fig. 2
Fig. 2
EPR spectra of asparagus root (a, b) and stem (c, d) inoculated with F. oxysporum (isolate 07-32s). FR free radical range
Fig. 3
Fig. 3
EPR spectra of control (noninoculated) asparagus root (a, b), stem (c, d). FR free radical range
Fig. 4
Fig. 4
EPR spectrum of manganese in stem sample: a inoculated with F. oxysporum (isolate 07-32s); b inoculated with F. proliferatum (isolate 06-76sb); c control sample
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