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Phytotoxic effects of fumonisin B1 on cowpea seed

  • Phytopathology/Mycology
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Abstract

The cultivation of cowpea (Vigna unguiculata) plays a vital role in the livelihood of many subsistence farmers and rural communities in tropical and subtropical countries. The seeds are prone to fungal infestation and mycotoxin contamination during sub-optimal storage conditions. Fumonisin B1 (FB1), produced byFusarium proliferatum, has been detected in cowpea seeds. Surface-disinfected seeds were imbibed in sterile distilled water amended with FB1 at various concentrations. Percentage germination was determined according to the International Seed Testing Association rules. All the toxin concentrations significantly decreased seed germination and the two highest concentrations — 50 and 100µg ml−1 FB1 — inhibited root and shoot elongation. FB1-treated embryonic tissues evinced compaction of the protoplasm and separation of the plasmalemma from the cell wall. Lipid bodies accumulated, which seemed to be lining the cell wall. This is the first study to demonstrate the phytotoxic effects of FB1 on cowpea seeds.

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Authors and Affiliations

  1. Dept. of Botany, University of Pretoria, 0002, Pretoria, South Africa

    Q. Kritzinger

  2. Dept. of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute, University of Pretoria, 0002, Pretoria, South Africa

    T. A. S. Aveling

  3. Laboratory for Microscopy and Microanalysis, University of Pretoria, 0002, Pretoria, South Africa

    C. F. van der Merwe

Authors
  1. Q. Kritzinger
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  2. T. A. S. Aveling
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  3. C. F. van der Merwe
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Correspondence to Q. Kritzinger.

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http://www.phytoparasitica.org posting Feb. 15, 2006.

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Kritzinger, Q., Aveling, T.A.S. & van der Merwe, C.F. Phytotoxic effects of fumonisin B1 on cowpea seed. Phytoparasitica 34, 178–186 (2006). https://doi.org/10.1007/BF02981318

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  • DOI: https://doi.org/10.1007/BF02981318

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