Publications by authors named "Castro-Espinoza L"
Bacillus paralicheniformis TRQ65 reprograms the gene expression patterns associated with systemic response to potentially facilitate its colonization and stimulate cell growth and plant biomass. Plant growth-promoting rhizobacteria (PGPR) carry out numerous mechanisms that enhance growth in seedlings, such as nutrient solubilization, phytohormone production, biocontrol activity, and regulation of induced systemic resistance (ISR) and acquired systemic resistance (ASR). Bacillus paralicheniformis TRQ65 is a biological and plant growth-promoting bacterium isolated from wheat (Triticum turgidum subsp.
View Article and Find Full Text PDFThe Yaqui Valley, Mexico, has been historically considered as an experimental field for semiarid regions worldwide since temperature is an important constraint affecting durum wheat cultivation. Here, we studied the transcriptional and morphometrical response of durum wheat at an increased temperature (+2 °C) for deciphering molecular mechanisms involved in the thermal adaptation by this crop. The morphometrical assay showed a significant decrease in almost all the evaluated traits (shoot/root length, biovolume index, and dry/shoot weight) except in the dry root weight and the root:shoot ratio.
View Article and Find Full Text PDFPlant characterization of genetically modified maize hybrids MON-89Ø34-3 × MON-88Ø17-3, MON-89Ø34-3 × MON-ØØ6Ø3-6, and MON-ØØ6Ø3-6: alternatives for maize production in Mexico.
Transgenic Res
February 2017
Article Synopsis
- Environmental risk assessment (ERA) evaluates whether genetically modified (GM) crops, specifically insect-resistant and herbicide-tolerant maize hybrids, could pose increased pest potential or environmental harm compared to conventional maize.
- Studies conducted across five ecoregions in Mexico from 2009-2013 showed no significant differences in aspects like stand count and lodging between GM hybrids and conventional maize, indicating minimal ecological risks.
- While some phenotypic differences were noted in seedling vigor and grain characteristics, these differences are not expected to lead to ecological risks, suggesting that the GM hybrids can effectively protect crops from insect damage without additional environmental concerns.
Article Synopsis
- Mexico is taking action to preserve its maize varieties and minimize gene flow between transgenic and conventional maize through spatial isolation.
- The study assessed outcrossing rates between yellow-kernel (transgenic) and white-kernel (conventional) maize at various distances, finding that outcrossing was highest (12.9%) at 1 meter and decreased significantly with distance.
- The results indicate that implementing spatial isolation can effectively reduce the risk of transgenic pollen contaminating local maize varieties in Mexico, supporting coexistence strategies used in other regions.
Article Synopsis
- The study investigates the risks of cryptosporidiosis and giardiasis among residents of Potam who drink from communal well water, highlighting the presence of these pathogens in all tested samples.
- QMRA was used to analyze the situation, revealing extremely high annual risk levels of 99% for cryptosporidiosis and 100% for giardiasis among the local population.
- The findings suggest a need for educational initiatives and treatment programs to address these health issues, as well as advocating for similar assessments in other rural communities in Mexico.
Background: Cryptosporidium oocysts and Giardia cysts can be transmitted by the fecal-oral route and may cause gastrointestinal parasitic zoonoses. These zoonoses are common in rural zones due to the parasites being harbored in fecally contaminated soil. This study assessed the risk of illness (giardiasis and cryptosporidiosis) from inhaling and/or ingesting soil and/or airborne dust in Potam, Mexico.
View Article and Find Full Text PDFMicrobiological water quality in a large irrigation system: El Valle del Yaqui, Sonora México.
J Environ Sci Health A Tox Hazard Subst Environ Eng
March 2012
The primary objective of this study was to determine the microbial water quality of a large irrigation system and how this quality varies with respect to canal size, impact of near-by communities, and the travel distance from the source in the El Valle del Yaqui, Sonora, México. In this arid region, 220,000 hectares are irrigated with 80% of the irrigation water being supplied from an extensive irrigation system including three dams on the Yaqui River watershed. The stored water flows to the irrigated fields through two main canal systems (severing the upper and lower Yaqui Valley) and then through smaller lateral canals that deliver the water to the fields.
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