Aflatoxin B1-induced ultrastructural alterations in mature Zea mays embryos

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Abstract

Mature maize (Zea mays L.) embryos were exposed to aflatoxin B1 (AFB1) concentrations ranging from 0.1 to 25 μg/ml for 9 days. With increasing toxin concentration above 2 μg/ml, primary root elongation of germinated embryos was progressively inhibited, to reach a maximum value of 81% at 25 μ/ml toxin. An ultrastructural investigation of the subcellular alterations induced following toxin exposure provided evidence of deteriorative changes in several compartments of the plant cell. Alteration in membrane integrity (e.g., the tonoplast, plasmalemma and inner mitochondrial membrane) was a frequent feature of many cells. Apparent fusion of vacuoles, incorporation of cytoplasmic components into vacuoles and intravacuolar membrane whorls might be interpreted as deteriorative alterations. The results are discussed in the light of ultrastructural findings for other plant systems exposed to similar AFB1 concentrations, as well as findings for animal systems.

Original languageEnglish
Pages (from-to)181-192
Number of pages12
JournalMycopathologia
Volume128
Issue number3
DOIs
Publication statusPublished - 1 Dec 1994
Externally publishedYes

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Aflatoxin B1
aflatoxin B1
Vacuoles
Zea mays
embryo (animal)
toxins
Embryonic Structures
vacuoles
Membranes
Plant Cells
Mitochondrial Membranes
tonoplast
root growth
plasma membrane
cells
corn
animals

Cite this

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title = "Aflatoxin B1-induced ultrastructural alterations in mature Zea mays embryos",
abstract = "Mature maize (Zea mays L.) embryos were exposed to aflatoxin B1 (AFB1) concentrations ranging from 0.1 to 25 μg/ml for 9 days. With increasing toxin concentration above 2 μg/ml, primary root elongation of germinated embryos was progressively inhibited, to reach a maximum value of 81{\%} at 25 μ/ml toxin. An ultrastructural investigation of the subcellular alterations induced following toxin exposure provided evidence of deteriorative changes in several compartments of the plant cell. Alteration in membrane integrity (e.g., the tonoplast, plasmalemma and inner mitochondrial membrane) was a frequent feature of many cells. Apparent fusion of vacuoles, incorporation of cytoplasmic components into vacuoles and intravacuolar membrane whorls might be interpreted as deteriorative alterations. The results are discussed in the light of ultrastructural findings for other plant systems exposed to similar AFB1 concentrations, as well as findings for animal systems.",
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Aflatoxin B1-induced ultrastructural alterations in mature Zea mays embryos. / McLean, Michelle.

In: Mycopathologia, Vol. 128, No. 3, 01.12.1994, p. 181-192.

Research output: Contribution to journalArticleResearchpeer-review

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