Browsing by Author "Morales-Rojas, Eli"

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Analysis of Germination Curves of Cinchona officinalis L. (Rubiaceae) Using Sigmoidal Mathematical Models.
(Hindawi Limited, 2023-01) Quiñones Huatangari, Lenin; Huaccha-Castillo, Annick Estefany; Fernandez-Zarate, Franklin Hitler; Morales-Rojas, Eli; Marrufo-Jiménez, Jenny Del Milagro; Mejía-Córdova, Leslie Lizbeth
Seed germination is the fundamental phenomenon that determines the successful growth and development of each plant species, even more so in Cinchona ofcinalis, which is a forest species that stands out for its medicinal importance. Te objective of this work was to determine the best sigmoidal mathematical model describing the germination of C. ofcinalis. For the germination test, a completely randomized design was used with six treatments and three replicates per treatment; 100°C. ofcinalis seeds were used per replicate, and 1800 seeds were needed in the trial. Gompertz sigmoidal, logistic, and von Bertalanfy models were used to analyse the germination curves of C. ofcinalis. Te results of these adjustments were analysed based on the graphic representation and statistical criteria (Akaike’s value (AIC), R2, and R2 ai). Te results suggest that the Gompertz and logistic models have a better graphic representation, showing values close to those observed, while the von Bertalanfy model shows negative germination values. According to the statistical criteria, the lowest AIC and the highest were obtained. R2 and R2 ai with the Gompertz model, followed by the logistic model and von Bertalanfy. It is concluded that the Gompertz model can represent the shape of the germination curves of C. ofcinalis for the six treatments of the test.
Effect of arbuscular mycorrhiza on germination and initial growth of Cinchona officinalis L. (Rubiaceae).
(Taylor and Francis, 2022-09) Fernandez-Zarate, Franklin Hitler; Huaccha-Castillo, Annick Estefany; Quiñones Huatangari, Lenin; Vaca-Marquina, Segundo Primitivo; Sánchez-Santillan, Tito; Morales-Rojas, Eli; Seminario-Cunya, Alejandro; Guelac-Santillan, Marly; Barturén Vega, Luci Magali; Coronel-Bustamante, David
Cinchona officinalis, known locally as cascarilla or cinchona, is a plant species native to South America. It was used as a source of quinine to combat malaria in the 17th century. The species is threatened by various anthropogenic activities. Further, the propagation of the species depends on seed dispersal and its germination capacity. Therefore, it is necessary to conserve and propagate this species. Because C. officinalis seeds have a low germination capacity, we determined the effect of arbuscular mycorrhizae (AM) on their germination and growth. A randomized design was employed with two treatments, one treated with mycorrhizae (CM) and another without mycorrhizae (SM). For each treatment, three replicates of 100 seeds were used. Germination, growth, and fungal characteristics were evaluated. In germination parameters, the CM treatment showed better performance, but the improvement was statistically insignificant. However, the application of AM significantly improved seedling height (cm), root length (cm), leaf area (cm2), and root number by 53.52, 28.72, 29.73, and 61.66%, respectively. Likewise, mycorrhization intensity (%), mycorrhization frequency (%), and extraradical mycelium length (cm) in the CM treatment were 37.13, 3.44, and 174.97% higher compared to the SM treatment, respectively. Therefore, the use of AM fungi proves to be advantageous in the propagation of C. officinalis, and these results provide a basis for the largescale and sustainable propagation of this species.
Non-destructive estimation of leaf area and leaf weight of Cinchona officinalis L. (Rubiaceae) based on linear models.
(Taylor and Francis, 2023-06) Huaccha-Castillo, Annick Estefany; Fernandez-Zarate, Franklin Hitler; Pérez-Delgado, Luis Jhoseph; Tantalean-Osores, Karla Saith; Vaca-Marquina, Segundo Primitivo; Sánchez-Santillan, Tito; Morales-Rojas, Eli; Seminario-Cunya, Alejandro; Quiñones Huatangari, Lenin
Non-destructive methods that accurately estimate leaf area (LA) and leaf weight (LW) are simple and inexpensive, and represent powerful tools in the development of physiological and agronomic research. The objective of this research is to generate mathematical models for estimating the LA and LW of Cinchona officinalis leaves. A total of 220 leaves were collected from C. officinalis plants 10 months after transplantation. Each leaf was measured for length, width, weight, and leaf area. Data for 80% of leaves were used to form the training set, and data for the remaining 20% were used as the validation set. The training set was used for model fit and choice, whereas the validation set al.lowed assessment of the of the model’s predictive ability. The LA and LW were modeled using seven linear regression models based on the length (L) and width (Wi) of leaves. In addition, the models were assessed based on calculation of the following statistics: goodness of fit (R2), root mean squared error (RMSE), Akaike’s information criterion (AIC), and the deviation between the regression line of the observed versus expected values and the reference line, determined by the area between these lines (ABL). For LA estimation, the model LA ¼ 11.521(Wi) 21.422 (R2 ¼ 0.96, RMSE ¼ 28.16, AIC¼ 3.48, and ABL¼ 140.34) was chosen, while for LW determination, LW ¼ 0.2419(Wi) 0.4936 (R2 ¼ 0.93, RMSE ¼ 0.56, AIC ¼ 37.36, and ABL¼ 0.03) was selected. Finally, the LA and LW of C. officinalis could be estimated through linear regression involving leaf width, proving to be a simple and accurate tool.
Where Are We with Respect to Research in Support of Sustainable Development Goal 13? Bibliometric Analysis.
(International Information and Engineering Technology Association, 2024-12) Fernandez-Zarate, Franklin Hitler; Pérez-Delgado, Luis Jhoseph; Coronel-Bustamante, David; Huanca-Silva, Leisy; Taboada-Mitma, Victor H.; Quispe-Carhuapoma, Mariela; Oliva-Alvarez, Yashira; Huaccha-Castillo, Annick Estefany; Seminario-Cunya, Alejandro; Quiñones Huatangari, Lenin; Ocaña-Zuñiga. Candy Lisbeth; Morales-Rojas, Eli; Vaca-Marquina, Segundo; Miguel-Miguel, Hugo; Cruz-Luis, Juancarlos
Climate change is one of the main global challenges, addressed in the United Nations Sustainable Development Goal (SDG) 13, which seeks to “take urgent action to combat climate change and its impacts”. The objective of the research was to analyze scientific articles that directly relate to SDG 13 through a bibliometric analysis for the period 2015 to 2024 of the Scopus database using the search term “SDG 13” OR “Sustainable Development Goal 13”. The research identified prolific authors, articles, sources with the highest impact in the area of study, leading institutions and countries in publications along with a detailed keyword analysis. The results show that interest in the study of SDG 13 has grown significantly with a focus on areas such as mitigation and adaptation, low carbon economy and public policy. This analysis provides an overview of advances in SDG 13 research, helps to identify knowledge gaps and emerging areas, and contributes to the formulation of effective policies and the drive for global climate action.