干旱区生态环境知识资源中心(Arid): A polyphasic study of non-aflatoxigenic Aspergillus flavus Link, isolates from maize in the Chaco semi-arid region of Argentina

Arid

	A polyphasic study of non-aflatoxigenic Aspergillus flavus Link, isolates from maize in the Chaco semi-arid region of Argentina
	Barontini, Javier; Zanon, Maria Silvina Alaniz; Torrico, Ada Karina; Druetta, Marcelo; Luna, Ignacio Martin; Posse, Agustina Ruiz; Chulze, Sofia Noemi; Pecci, Maria de la Paz Gimenez
通讯作者	Barontini, J
来源期刊	REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS
EISSN	1853-8665
出版年	2024
卷号	56 期号:1 页码:58-73
英文摘要	Maize ( Zea mays L.) is one of the most widely planted crops globally with Argentina leading world production and exportation. Santiago del Estero province, east of Tucum & aacute;n and north of C & oacute;rdoba encompasses eight agro-climatic zones in the Chaco Semi -arid region, agro-ecologically characterized by a wide temperature range and frequent drought periods that expose the crop to pathogens, particularly Aspergillus flavus . This pathogen is responsible for ear rot and grain contamination with mycotoxins such as aflatoxin B 1 and cyclopiazonic acid. This study obtained fungal isolates from ears of maize and characterized them according to toxigenic capability and morphotype of sclerotia (S < 400 m, associated with high levels of aflatoxins and L > 400 mu m, related to variable levels of aflatoxins). In addition, those not producing aflatoxins were studied to determine phylogenetic relationships based on sequences of a segment of the CaM gene. Fifty-eight isolates were obtained in eight localities representing each agro-climatic zone, 30 of which were non-aflatoxigenic, 28 aflatoxigenic, and all producers of ciclopiazonic acid. Six isolates did not produce sclerotia, 51 were L and only one was S, the latter being a non -producer of aflatoxins. The number of sclerotia was positively correlated with the production of aflatoxin B 1 , while size was negatively correlated. The CaM gene sequences corroborated that the isolates belonged to the A. flavus clade and the high nucleotide similarity among them (99.4% to 100%) revealed almost zero genetic diversity in this geographic region. No significant differences were observed in the proportion of isolates between growing seasons or among agroclimatic districts. This research revealed characteristics of fungus populations in this agricultural region of north Argentina.
英文关键词	non-aflatoxigenic isolate cyclopiazonic acid sclerotia production phylogenetic relationships
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001265087700006
WOS关键词	POTENTIAL BIOCONTROL AGENTS ; SECTION FLAVI ; BIOLOGICAL-CONTROL ; POPULATION-STRUCTURE ; CYCLOPIAZONIC ACID ; GENETIC DIVERSITY ; CONTAMINATION ; STRAINS ; IDENTIFICATION ; ASSOCIATION
WOS类目	Agriculture, Multidisciplinary
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405393
推荐引用方式 GB/T 7714	Barontini, Javier,Zanon, Maria Silvina Alaniz,Torrico, Ada Karina,et al. A polyphasic study of non-aflatoxigenic Aspergillus flavus Link, isolates from maize in the Chaco semi-arid region of Argentina[J],2024,56(1):58-73.
APA	Barontini, Javier.,Zanon, Maria Silvina Alaniz.,Torrico, Ada Karina.,Druetta, Marcelo.,Luna, Ignacio Martin.,...&Pecci, Maria de la Paz Gimenez.(2024).A polyphasic study of non-aflatoxigenic Aspergillus flavus Link, isolates from maize in the Chaco semi-arid region of Argentina.REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS,56(1),58-73.
MLA	Barontini, Javier,et al."A polyphasic study of non-aflatoxigenic Aspergillus flavus Link, isolates from maize in the Chaco semi-arid region of Argentina".REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS 56.1(2024):58-73.