ORIGINAL ARTICLE
Discoloured seeds of amaranth plant infected by Alternaria alternata: physiological, histopathological alterations and fungal secondary metabolites associated or registered
 
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1
Instituto Fitotécnico de Santa Catalina, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, CP 1836, Llavallol, Buenos Aires, Argentina
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Centro de Investigaciones Fitopatológicas, Cátedra de Fitopatología, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, CP1900 La Plata, Buenos Aires, Argentina
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Comisión de Investigaciones Científicas de la provincia de Buenos Aires, CP 1900 La Plata, Buenos Aires Argentina
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Facultad de Ciencias Agrarias, Universidad Nacional de Lomas de Zamora, CP1836, Llavallol, Argentina
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Department IFA-Tulln, University of Natural Resources and Life Sciences Vienna (BOKU), Konrad Lorenz Strasse 20, CP 3430, Tulln, Austria
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Consejo Nacional de Investigaciones Científicas y Tecnológicas, CABA, Av. Rivadavia 1917, CP 1033, Buenos Aires, Argentina
CORRESPONDING AUTHOR
María Cristina Noelting
Instituto Fitotécnico de Santa Catalina, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, CP 1836, Llavallol, Buenos Aires, Argentina
Submission date: 2016-01-27
Acceptance date: 2016-06-22
 
Journal of Plant Protection Research 2016;56(3):244–249
KEYWORDS
TOPICS
ABSTRACT
In the present study the aspects of discolouration that could influence both the production and consumption of amaranth were analyzed with the objectives to identify the presence of Alternaria alternata on seeds, to analyze possible changes in the anatomy of seed tissues and to detect the presence of fungal secondary metabolites. Component plating, histopathological and mycological analyses on discoloured seeds allowed i) location of propagules of A. alternata in all seminal components; ii) observation of hypertrophies in perisperm and embryo and iii) determination of several fungal secondary metabolites, mainly high concentrations of tenuazonic acid. To our knowledge, the information presented in this paper, related to physiological, histopathological changes and fungal secondary metabolites on discoloured seeds of (Amaranthus mantegazzianus syn. A. caudatus subsp. mantegazzianus (Pass) Hanelt affected by A. alternata, is the first worldwide record.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
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