Journal of Natural Resources and Farming
Revista de recursos naturales y agricultura; recursos naturales; ⁠biología; agronomía; ⁠agricultura; veterinaria; investigaciones científicas; revista de acceso abierto
Este trabajo está bajo una Licencia Creative Commons Atribución-NoComercial 4.0 Internacional (CC BY-NC 4.0).
Derechos de autor 2026 Braulio Soto-Cerda (Autor/a) https://creativecommons.org/licenses/by-nc/4.0
Lignans: phytoestrogens present in flaxseed (Linum usitatissimum L.) and their benefits tohuman health.
Flaxseed (Linum usitatissimun L.) is a multipurpose oil crop valued for containing various beneficial functional ingredients. Lignans are a type of phytoestrogen that mostly exists as secoisolariciresinol diglucoside (SDG) in seed coat. SDG is transformed into different lignans in conjunction with bacterial glucosidase. This revision, therefore, documents the composition of the lignans present in flaxseed hull and its positive effect on human health. This state of art examines from the metabolic pathway involved in lignans synthesis and their mechanisms of joining with ER estrogen receptors to induce a response in humans. It also analyses the effects of ingestion of flaxseed on human beings. Finally, lignans intervene in gene transduction in conjunction with ER by stimulating positive responses to human vital functions. Overall, the extensive evidence supporting lignans benefits to human health should increase flaxseed consumption in global population.
Derechos de autor 2026 Izsavo Soto-Saravia, Braulio Soto-Cerda (Autor/a) https://creativecommons.org/licenses/by-nc/4.0
La fusión de alta resolución (Bar-HRM) es una técnica rápida y eficiente para lacaracterización molecular de morillas (Morchella spp) del sur de Chile.
La recolección de morillas (Morchella spp.) es relevante en Chile como Producto Forestal No Maderable, pero la identificación de especies es compleja por la taxonomía del género y la disponibilidad limitada de estudios moleculares locales. En este trabajo evaluamos la utilidad de la técnica Bar-HRM (high-resolution melting) aplicada al marcador ITS como herramienta rápida de discriminación molecular, calibrada mediante secuenciación ITS y análisis filogenético. Se obtuvieron seis cepas a partir de esporadas de muestras ambientales recolectadas en la cordillera de la Costa (Región del Biobío) y la precordillera andina (Región de La Araucanía) y Aysén. Los perfiles HRM del ITS revelaron cuatro patrones de fusión diferenciables y fueron, en general, consistentes con tres entidades taxonómicas reconocidas mediante el análisis filogenético basado en ITS: M. importuna, M. tridentina y M. andinensis. En M. importuna se observó un desplazamiento cercano a 1 °C entre dos cepas, lo que sugiere variación intraespecífica o efectos La fusión de alta resolución para identificar Morchella eficientemente. técnicos y refuerza la necesidad de ampliar el muestreo para definir rangos de variación. En conjunto, nuestros resultados apoyan el uso de Bar-HRM como método complementario de tamizaje rápido para discriminar entidades de Morchella previamente caracterizadas, con potencial aplicación en trazabilidad y control de calidad.
Derechos de autor 2026 David Alors, Leonardo Anabalon, Gabriel Vivallo (Author) https://creativecommons.org/licenses/by-nc/4.0
Genetic structure and responses of flax (Linum usitatissimum L)germplasm to phytotoxic aluminum (Al3+) in acid soils of southernChile
Flax (Linum usitatissimun L) is a versatile crop valued for its oil and functional compounds However, the presence ofphytotoxic aluminum (Al3+) in acid soil, limits its productivity, specifically in southern Chile where acid soils of the Andisoltype abound. The objective of this study was to characterize the genetic structure of 40 flax accessions using 2,200 singlenucleotide polymorphism (SNP) markers using STRUCTURE and Neighbor Joining (NJ) algorithms, and to analyze theirshoot and root phenotypic responses to aluminum toxicity in an acid soil to identify tolerant genotypes that could be usedin flax breeding. STRUCTURE and NJ methods grouped the 40 genotypes into three groups. Significant treatment andgenotypic effects were observed for total root length (TRL), root area (RA), apical root length (ARL) and root volume (RV)(p < 0.05). STRUCTURE groups 1 and 2 (G1 and G2) outperformed group 3 (G3) for RA (control and Al3+), ARL (Al3+), TRL(control), RV (control and Al3+), and relative root area. Fisher exact test for root traits under control and Al conditions enabledthe identification of genotypes differentially responding to stress and non-stress treatments. Pearson correlation analysisindicated that root traits either under Al3+ stress or limed soil conditions exhibited moderate to high associations amongthem (r= 032 – 096), suggesting shared root development regulation. Hierarchical and multivariate analyses of root traits andtheir relative growth indices identified the Al3+ tolerant genotypes G188 (fiber type), G87 (fiber type), and G401 (oil type),which showed superior relative total root length (RTRL), relative apical root length (RARL), and relative root area (RRA). Thepresent study revealed unexplored genetic variation in response to Al3+ stress and provide potential parental lines to improveflax adaptation to acidic soil conditions as those prevailing in southern Chile.
Derechos de autor 2025 Edith Severo Cid, Branko Contreras-Beltrán, Braulio Soto-Cerda (Autor/a) https://creativecommons.org/licenses/by-nc/4.0
Climate Change Effects: Insights from Agroforestry Farmers in GwerEast, Benue State, Nigeria
This study explored farmers' awareness of climate change impacts on agroforestry farms in Gwer East, BenueState, Nigeria. Using a multi-stage sampling method, four council wards and fifteen villages were selected. A total of 292farmers were interviewed using a semi-structured questionnaire via Google Forms. Results showed that most respondentswere male (90.4%), aged 36-45 years (29.5%), Christian (99.7%), and married (94.2%). Farming was their primary (88.4%)and secondary occupation (82.2%), with average household sizes of 5-7 members (34.6%). Most earned no income (87.7%)and had undergraduate-level education (42.8%). The farmers practiced alley cropping (95.9%) and a crops-and-trees system(94.9%), with 57.5% having over 15 years’ experience. There was a significant positive correlation between educational statusand both awareness of climate change (ρ = .338, p < .01) and knowledge of its causes (ρ = 0.406, p < 0.01). Most (58.9%)farmers were aware of climate change, with awareness higher among females (71.4%) than males (57.6%), while more males(42.4%) than females (28.6%) reported no awareness. Males made up most of the sample (90.4%). Chi-square analysis showedno statistically significant association between gender and climate change awareness (Pearson Chi-square = 2.007, df = 1,p = 0.157). Farmers mainly got climate change information from public gatherings (33.6%) and linked it to natural causes,observing extreme heat (89.7%) and drought (80.8%). Key impacts included reduced crop yields (84.6%) and pasture loss(96.6%), with tree planting (96.9%) as the top mitigation strategy. Modern technologies and better access to credit (90.1%)were widely recommended for adaptation.
Derechos de autor 2025 David Ekhuemelo, Aperaga Ushahemba, Grace Dachung (Autor/a) https://creativecommons.org/licenses/by-nc/4.0
Contribuciones al conocimiento florístico de Gaianes (Alicante,España): un enclave mediterráneo en la Sierra del Benicadell
Este estudio se centra en la catalogación de la flora en Gaianes, localidad situada en las faldas de la Sierra delBenicadell, al norte de la provincia de Alicante, España. La región, caracterizada por su clima mediterráneo y diversidad dehábitats, alberga una notable riqueza florística. Según el Banc de Dades de Biodiversitat de la Comunitat Valenciana (BDBCV),se han citado más de 650 especies del reino Plantae, incluyendo unos 50 briófitos, 10 pteridofitos y aproximadamente300 hongos. El muestreo realizado entre febrero y marzo de 2024 reveló 14 nuevas citas, lo que demuestra el potencialde descubrimiento florístico en áreas poco exploradas. El inventario florístico realizado muestra un predominio de floraautóctona (81,8 %) frente a flora alóctona (18,2 %). La catalogación detallada de estas especies es esencial para comprender labiodiversidad vegetal y su distribución en microhábitats específicos, resultando fundamental para la conservación y gestiónde estos ecosistemas mediterráneos únicos.
Derechos de autor 2025 Jordi Martinez-Jorda , Salvador Chiva Natividad (Author) https://creativecommons.org/licenses/by-nc/4.0
Drinking water status and Health Risk Assessment of a South-EasternNigeria River
Purpose: Drinking water is one of the ecosystem services derived from lotic systems especially in developing countries.However, drinking from water sources of doubtful quality portends serious health risks. The heavy metal concentrations of arural Southeastern Nigeria river were evaluated between November 2023 and October 2024 to determine its drinking waterstatus and potential health risks.Methods: Chemical analysis, Water Pollution Index (WPI), Risk Quotient (RQ) and non-carcinogenic health risk assessmentwere used. Eight heavy metals were evaluated, using standard methods and compared with Nigerian Standard for DrinkingWater Quality.Results: The concentrations were iron (0.62 – 1.65 mg/L), manganese (0.24 – 1.10 mg/L), copper (0.18 – 0.93 mg/L), zinc(0.39 – 1.23 mg/L), chromium (Cr(VI)) (0.09 - 0.56 mg/L), lead (0.05 - 0.37 mg/L), cadmium (0.01 - 0.28 mg/L), and nickel(0.02 - 0.19 mg/L). All exceeded their limits except copper and zinc. WPI values were > 1, ranging from 8.22 (station 2) to9.58 (station 3); indicating serious pollution while risk quotient (RQ >1) confirmed that iron, manganese, chromium (VI),lead, cadmium, and nickel were of health interest. The hazard indices (HI) were > 1, with adults ranging from 7.91 (station 2)to 9.14 (station 3) and children from 10.86 (station 2) to 12.66 (station 3). Anthropogenic activities within the watershed andseason influenced the metals. Chromium, lead, nickel and cadmium contributed to the observed adverse health risks, whichwas more on the children.Conclusion: The Anya River water is not potable but can be used for other domestic purposes like washing, cleaning andirrigation.
Derechos de autor 2025 Emeka Donald Anyanwu, Lauretta Adaku Onyemachi, Amarachi Grace Stephen (Autor/a) https://creativecommons.org/licenses/by-nc/4.0
Efecto del tamaño corporal en una cadena alimentaria estructurada por edadcon pulsos de nacimiento en plagas
Un desafío ecológico es comprender los efectos de la reducción del tamaño corporal en respuesta al cambio climático, un fenómeno que podría alterar significativamente los sistemas agroecológicos. Sin embargo, los efectos de estos cambios en los rasgos individuales y las interacciones tróficas sobre la estructura de las redes alimentarias en dichos sistemas aún no se han explorado en su totalidad. En el hemisferio sur, la importancia socioeconómica y cultural de la agricultura justifica la necesidad de investigar estos sistemas. En este estudio, la planta hospedante seleccionada es la sandía (Citrullus lanatus), la plaga corresponde al pulgón del algodón (Aphis gossypii) y el potencial agente de control biológico es el ácaro depredador chileno (Eriopis chilensis). Para comprender teóricamente la estructura de esta cadena alimentaria, desarrollamos un modelo de tres niveles que incluye el control biológico, dos plagas y la planta hospedante. El modelo combina un sistema dinámico continuo con pulsos discretos que representan los nacimientos y la introducción de nuevos individuos del agente de control. Las respuestas funcionales de tipo II de Holling, las tasas de reproducción y mortalidad y la capacidad de carga dependiente del tamaño corporal de la especie se integran en el modelo. Adicionalmente, se presenta un algoritmo computacional que permite simular el comportamiento del sistema agroecológico. Esta propuesta ofrece una herramienta teórica para mejorar la comprensión de las interacciones entre especies y anticipar dinámicas que podrían ser útiles en el diseño de estrategias de manejo y control agroecológico.
Derechos de autor 2025 William Campillay-Llanos (Autor/a) https://creativecommons.org/licenses/by-nc/4.0