The effects of aflatoxin B1 on immature germinating maize (Zea mays) embryos

M. McLean, P. Berjak, M. P. Watt, M. F. Dutton

Research output: Contribution to journalArticleResearchpeer-review

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Abstract

Immature maize (Zea mays L.) embryos were treated with aflatoxin B1 concentrations, ranging from 0.1 μg ml-1 to 25 μg ml-1. Below 5 μg ml-1 aflatoxin B1, root and shoot elongation was not significantly inhibited. Ultrastructurally, root tip cells showed little deterioration, except a possible diffused clearing in mitochondria and plastids. As the toxin concentration was increased above 5 μgml-1, shoot, and particularly root elongation, was progressively inhibited. Associated with this, there was an apparent decrease in the ribosome population. Furthermore, membranes, particularly the vacuolar membrane, became abnormal and vacuolar distension occurred. At 20 and 25 μg ml-1, these effects were exacerbated, and mitochondria and plastid structure was disrupted. At these concentrations, there was evidence of a disruption in lipid metabolism. The results are discussed in the context of known aflatoxin effects on cellular control mechanisms and ultrastructure in animal systems.

Original languageEnglish
Pages (from-to)181-190
Number of pages10
JournalMycopathologia
Volume119
Issue number3
DOIs
Publication statusPublished - 1 Sep 1992
Externally publishedYes

Fingerprint

Aflatoxin B1
Plastids
aflatoxin B1
embryo (plant)
Zea mays
plastids
Mitochondria
mitochondria
Embryonic Structures
immatures
Aflatoxins
shoots
Membranes
corn
Meristem
ribosomes
Ribosomes
Lipid Metabolism
root tips
aflatoxins

Cite this

McLean, M. ; Berjak, P. ; Watt, M. P. ; Dutton, M. F. / The effects of aflatoxin B1 on immature germinating maize (Zea mays) embryos. In: Mycopathologia. 1992 ; Vol. 119, No. 3. pp. 181-190.
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The effects of aflatoxin B1 on immature germinating maize (Zea mays) embryos. / McLean, M.; Berjak, P.; Watt, M. P.; Dutton, M. F.

In: Mycopathologia, Vol. 119, No. 3, 01.09.1992, p. 181-190.

Research output: Contribution to journalArticleResearchpeer-review

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