Publications by authors named "Elizabeth Garcia-Leon"
Article Synopsis
- * There's a problem with the existing studies on plant pathogens in Mexico, as many lack proper scientific backing, making it hard to assess the true presence of these organisms.
- * The review suggests establishing a National Collection of Fungal Cultures and a National Herbarium, along with a comprehensive database to improve understanding and control of plant diseases, which would benefit various fields like quarantine management and biodiversity studies.
Frangipani (Plumeria rubra L.; Apocynaceae.) is a deciduous ornamental shrub, native to tropical America and widely distributed in tropical and subtropical regions.
View Article and Find Full Text PDFSoursop (Annona muricata L: Annonaceae) is a small tropical fruit tree native to South America (Pinto, 2005). The flesh of its fruits is widely used as a main ingredient of pastries, even young fruits are used as a vegetable. In June 2022, leaf spots symptoms were observed on fifty soursop plants in a commercial nursery located in Juan José Ríos (25°45'20"N 108°50'21"W), Ahome, Sinaloa State.
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- Sesame (Sesamum indicum L.) is a valuable oilseed crop that thrives in areas with limited water and soil fertility.
- In September 2020 and October 2022, anthracnose, a fungal disease, was documented in sesame fields in Mocorito and Guasave, Sinaloa, Mexico, affecting up to 35% of the crop in some areas.
- A fungus identified as Colletotrichum truncatum was isolated, characterized morphologically and genetically, and its DNA sequences were deposited in GenBank for reference.
Turcicum leaf blight (TLB) is a common foliar disease of maize in Mexico that is caused by the fungal pathogen . The most effective management strategy against TLB is monogenic race-specific resistance. Among the 140 isolates from symptomatic leaves collected from maize fields in Mexico, 100 were obtained from tropical (Veracruz) and temperate areas (Estado de México) between 2010 and 2019, and 40 isolates were obtained from tropical (Sinaloa, Tamaulipas, Veracruz, and Chiapas), subtropical (Nayarit, Jalisco, and Guanajuato), and temperate areas (Estado de Mexico, Hidalgo, and Puebla) collected in 2019.
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- Sesame is a significant oilseed crop in Mexico, cultivated on 80,000 hectares annually, and exhibits symptoms of collar rot disease in certain fields.
- In October 2020, this disease was observed in the SOPC-9539 TD variety sesame plants, leading to yellowing, wilting, and high mortality rates (15% incidence) due to fungal infection.
- Fungal isolation techniques revealed sclerotinia-like colonies, and one isolate has been stored for further study, with genomic analysis confirming its identity.
(Fabaceae family), known as guar or clusterbean, is a drought-tolerant annual legume cultivated on a commercial scale focused on industrial gum production. In September 2021, symptoms of leaf spot were observed on guar plants in several commercial fields located at Guasave, Sinaloa, Mexico. Symptoms included round to oval, light brown lesions with dark margins.
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- - Observations of collar rot in guar fields in Sinaloa, Mexico revealed symptoms like wilting and reduced growth, with disease incidence between 15% to 40% and a notable presence of white mycelium and brown sclerotia at the plants’ bases.
- - Fungal isolation from diseased plants involved surface sterilization and culturing on PDA medium, resulting in white, cottony colonies with dark brown sclerotia, which were characterized microscopically and purified using the hyphal-tip method.
- - Molecular analysis including DNA extraction and sequencing of the ITS region confirmed the identity of the fungus with 99.21% to 100% similarity to known sequences, and the isolate was deposited in a culture
Article Synopsis
- - Guar is an annual legume from the Fabaceae family, primarily cultivated for industrial use and animal feed, and recently showed anthracnose symptoms in fields in Sinaloa, Mexico, with a disease incidence of up to 15%.
- - The affected plants displayed irregular, necrotic lesions on leaves with a dark brown halo and sunken lesions on pods, leading to the isolation of pathogen colonies which were characterized morphologically and genetically.
- - A specific isolate was deposited for further study, and DNA sequencing of several genes confirmed its identity, matching other known sequences in GenBank, leading to the development of a phylogenetic tree for further analysis.
Fusarium head blight (FHB) is one of the most important diseases affecting wheat production worldwide. In Mexico, and are the dominant species causing FHB of wheat (Cerón-Bustamante et al. 2018).
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- Citrus anthracnose, caused by fungal species, is a significant disease affecting citrus fruits, notably impacting Mexican lime, sweet orange, and grapefruit trees in northern Sinaloa, Mexico, as observed in spring 2019.
- Infected samples exhibited petal necrosis and lesions, leading to the isolation of 30 fungal isolates, with five being selected for further analysis regarding morphology, phylogenetics, and pathogenicity tests.
- The genetic analysis confirmed their classification within specific species complexes, with sequences shared in GenBank, contributing to a deeper understanding of the pathogens responsible for citrus anthracnose.