The present research was carried out with the objective of determining the comparative differential morphological characteristics between the pollen grains of Citrus aurantifolia (Christm.) Single 1913, Citrus limon (L.) Osbeck 1765, Citrus latifolia (Yu. Tanaka) Yu. Tanaka 1951 and Citrus medica (L.) 1853, from Cajamarca and La Libertad, Perú. Samples of stems and branches with...
This research describes the phenotypic variation of Oreochromis niloticus in the F1 generations and backcrossing with YY parent males, focusing on body color and the percentage of natural sexual reversal. The F1 generation derives from red YY males and XX grey females, while backcrossing involves XY neofemales from F1 with red YY males. To evaluate the color of the body, ranges...
Raphanus sativus L., known as “rabanito,” is a healthy vegetable with low caloric content and high in vitamin C, which strengthens the immune system. However, this plant requires inorganic fertilizers, many of which are contaminated with heavy metals, such as cadmium and lead, which represents a potential risk for food safety. Therefore, the objective of this research was to...
The study evaluated the genotoxicity of sodium benzoate and potassium sorbate using the comet assay, employing erythrocytes of Oreochromis niloticus (tilapia) as an ex vivo biological model. This model is a viable alternative due to its genetic homogeneity, nucleated cells, and low cost. Treatments were conducted with concentrations of 40, 65, and 90 mg/ml of both preservatives...
The effect of the essential oil of Mentha spicata leaves on the growth of Microsporum gypseum in vitro was evaluated. We worked with the vegetable from the agricultural crops of Pedregal, Simbal District, Trujillo Province, La Libertad; obtaining the essential oil was carried out using the hydrodistillation method in Clevenger equipment. To evaluate its effect, the technique of...
Palm trees (Arecaceae) originate from the world’s tropical rainforests and through diversification at least 10% have adapted to ecosystems characterized by some degree of water limitation. In this sense, palm trees that have adapted to Seasonally Dry Tropical Forests (BTES) and Tropical Limestone Karst Rock Forests (BTRCK) in Peru are announced. A review of both the literature...
After reviewing herbarium material in conjunction with a monograph for Mniodes (A.Gray) Benth., we have recognized a new species from Bolivia, M. mandonii Quip. & M.O.Dillon, sp. nov. Our new species represents a collection originally cited as Lucilia facelioides Sch.Bip., a nomen nudum published in the enumeration of G. Mandon’s Bolivian collections. Since the name has no formal...
Flowering wild vegetation contributes to the maintenance of biodiversity, ecological balance and the sustainability of ecosystems, with a positive influence, in particular, on pollinating insects. The objective of this research was to characterize morphologically the pollen grains of wild flowering plants predominant in the town of Laramie, province of Chao, department of La...
Peperomia hartwegiana is a high Andean medicinal plant popularly called “congona redonda”. It is used to cure inflammations and some infectious diseases, and it is marketed in the popular market from Huaraz. Then, it was collected some samples of P. hartwegiana at the Challhua folkloric market and stored in refrigeration in paper bags before their histological cuts. The organs...
The analysisis based on the taxonomic identification of the plant microremains (starch grains, plant tissue and silicophytoliths) recorded in rodent coprolites from the Huaca Ventarrón archaeological site, a temple of great regional importance during the Late Pre-Ceramic period between 3000-1700. AC The research objective is linked to probably knowing the plants used in this pre...
In the present investigation, hydrological changes were analyzed considering possible changes in flows in the Moche River basin to improve the water supply in this part of the La Libertad Region in the future; as well as mitigate the impact of anomalous behaviors over time. To achieve this objective, daily hydrological information was collected from the Quirihuac hydrometric...
The Peruvian Central Andes wetlands of the tropical region at South America with cianobacterial and microalgal flora related with their biomass and productivity of aquatic Andean ecosystems. Standard cyanobacterial collections of Churiacocha lagoon (elevation: 4500-4650 m) at Junin region were carried out in winter, and from the Nupe river (elevation:3200 -3260 m) at Huanuco...
Diversity of Peruvian plant communities. A review through a phytosociological classification. The present work is an update of the syntaxonomic scheme, whose units make up the Peruvian vegetation landscape. Vegetation units are based on 3459 phytosociological plots processed according to the Braun- Blanquet approach. As a result, 24 plant formations were presented: Forests (dry...
The work responds highlighting interest and presence of Alejandro Manuel Fernandez Honores Botanical Garden of National University of Trujillo as an ex-situ Conservation Center, mainly native flora to the Peruvian coast, given need to promote environmental conservation habits on academic context and citizens of Trujillo. Garden give orientated to, didactic, guiding its actions...
The prevalence of ESBL extended-spectrum beta-lactamase-producing Escherichia coli was determined in urine cultures of patients treated at the Cascas Hospital, La Libertad, Peru. 200 urine cultures were processed and sown on plates with Blood Agar and Agar MacConkey calibrated loop method, incubated at 37°C for 24 to 48 hours, cultures that presented colonies macroscopically...
The study and improvement of the antibacterial capacity of innovative compounds, such as nanoparticles, turns out to be of vital importance because bacteria are rapidly acquiring resistance to antibiotics. The objective of this research is to carry out a bibliographical review on the effect of silver nanoparticles obtained from different or diverse chemical syntheses applied to...
At the end of 2019, a new infectious respiratory condition located in Hubei Wuhan-China province caused by SARS-CoV-2 virus was manifested. Moreover, angiotensin-converting enzyme 2 (ACE2) was quickly identified as the critical functional receptor for SARS-CoV-2. The study of the ACE2 protein allows us to determine the possible reservoirs that coronaviruses such as SARS-CoV, SARS...
This research was carried out in order to obtain gallic acid by the action of the hydrolytic enzymes of Aspergillus niger that degrade the tannins presents in Caesalpinia spinosa (Fabaceae) “tara”, using a solid state bioreactor. The fermentations were carried out for 2, 4 and 6 days at room temperature, with an initial pH of 7.0 and a microbial inoculum of 109 espores/ml. The...
This research provides a comprehensive review of Physalis peruviana (Solanaceae), known as “aguaymanto”, focusing on phytochemicals, nutritional value, and associated benefits. In terms of phytochemicals, the plant exhibits notable diversity, including terpenes, phenolic compounds, alcohols, steroids, and whitanolides. Among them, carotenoids and flavonoids stand out, with the...
Natural regeneration is a continuous process of self-recovery of forest ecosystems. The research was carried out in an Andean forest in the Loja valley, Ecuador, with the objective of determining the state of natural regeneration of forest species present in an Andean forest and the relationship with physical variables. A permanent plot of one hectare was used, subdivided into 25...
A potentially key flora species study was conducted in the district of Cajatambo, Lima, Peru through their spatial and temporal patterns and population distribution over time. The records were made during 2015 and 2016 using 44 transects of 30 meters, in 9 plant formations. The selection of potentially key species was made by the contribution of the cover in diferent plant...
The relict forest of Huarimayo is located on the western slope of the central Andes of Peru, between 2700-3200 m. Together with Zárate and Linday, they are the only dry cloud forests reported for the department of Lima. These discontinuously distributed forests are considered among the most threatened ecosystems due to the burning of the soils for adaptation to agricultural land...
We added ten new angiosperm records for Peru, including the first representative of the family Goodeniaceae and two new genera, Calyptocarpus and Unxia (Asteraceae). Also, we typified Rumex fueginus Phil.Keywords : Asteraceae; Flora; Goodeniaceae; lectotypification; new records; Peru; Rumex..
Ecological information on the endemic Malesherbia tubulosa is presented, with its current and potential geographic distribution, habitats, natural history, biological associations and conservation status based on field observations, herbarium review and data analysis. M. tubulosa is recorded for the first time in the xerophytic scrublands of the department of Ica, expanding its...
Models of potential species distribution are a tool to visualize the range of suitable habitats where species could occur. The objective was to carry out a review of the distribution of four endemic bird species in a threatened situation, their niches and to design a potential predictive model of the distribution of species in the La Libertad region. The points of presence of...