Narciso Aguilera

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• PhD
• Professor at University of Concepción

The distribution of Acacia dealbata Link (Fabaceae) in its non-native range is associated with disturbed areas. However, the possibility that it can penetrate the native forest during the invasion process cannot be ruled out. This state- ment is supported by the fact that this species has been experimentally estab- lished successfully under the can...

The invasion process of Acacia dealbata is partially mediated by releasing allelochemicals that affect native plants and soil microbes. However, non-volatile chemical compounds responsible for the allelopathic effect remain unknown, even though the allelopathic potential of this species has been studied under Europe conditions. We examined the alle...

Acacia dealbata (Fabaceae) is an Australian species and invader in temperate regions worldwide.This species is based on a network of functional attributes, and from an ecophysiological point of view this confers a competitive advantage over cohabiting species. The invasion process of A. dealbata is partially mediated by releasing allelopathic compo...

Los trabajos llevados a cabo con el anacardo (Anacardium uccidentale L.) que se llevaron a cabo, a partir de embriones cigóticos maduros. Se estableció un procedimiento que permitió la liberación y el aislamiento de los emhryos, contenidos dentro de la tuerca; escapar de la dureza y la resistencia del epicarpio, y a la presencia de microorganismos...

Plant galls, induced by a variety of organisms such as insects, mites, and fungi, are crucial in plant ecology, evolution, and human culture. These galls are rich in secondary metabolites (SMs), which include phenolic compounds, terpenes, and other bioactive molecules. Phenolic compounds, particularly tannins, and flavonoids, are commonly found in...

Color and morphology are some of the most intriguing traits of plant galls, whose patterns resemble fruits and flowers. Many hypotheses were proposed to explain the involvement of anthocyanin accumulation with the development of red gall hues, whose mechanisms seem idiosyncratic. Anthocyanins are related to photoprotective strategies in green tissu...

Witches' brooms are abnormal branches that can affect various tree species in the Brazilian savanna, such as Xylopia aromatica. This disease leads to biomass loss and alters growth patterns. This study investigated the anatomical and physiological impacts of witches' broom on X. aromatica, hypothesizing that the disease induces changes in both...

Many insect-induced galls are considered complex structures due to their tissue compartmentalization and multiple roles performed by them. The current study investigates the complex interaction between Nothofagus obliqua host plant and the hymenopteran gall-inducer Espinosa nothofagi, focusing on cell wall properties and cytological features. The E...

Leaves of large-leaved lime, Tilia platyphyllos Scop. (Malvaceae), harbor colonies of Eriophyes tiliae (Pagenstecher) (Acari: Eriophyidae), capable of modifying the leaf structure (inducer of nail-galls) and physiology. The aerial organs of T. platyphyllos havetraditionally been consumed for their high antioxidant capacity, related to the rich poly...

Teline monspessulana and Ulex europaeus (Fabaceae) are highly invasive species distributed worldwide. In Chile, both species share a similar distribution area with the native species Quillaja saponaria and Peumus boldus. This research focused on determining the effects caused by the aqueous extracts of the aerial organs of both invaders on the init...

Vitis vinifera is cultivated worldwide for its high nutritional and commercial value. More than 60 grape cultivars are cultivated in Chile. Two of these, the país and the corinto cultivars, are the oldest known and widely used for the preparation of traditional homemade drinks and consumption as table grapes. These two grape cultivars are afected b...

Peumus boldus, a tree native to Chile, is extensively used for medicinal purposes due to its richness in alkaloids and antioxidant polyphenols. A species of galling insect, Dasineura sp. induces structural and chemical changes on P. boldus stems while its galls are established and developed. Taking into account the antioxidant properties of P. bold...

Objetive. Determine and compare the biochemical and mineral composition of plant species consumed by grazing goats in three seasons of the year (drought, rain, and transition). Materials and methods. Sampling of the plant species that consume goats in each season of the year were made, during the time the goats feed on the rangeland, following them...

The allelophatic effect of the invasive Fabaceae, Ulex europaeus and Teline monspessulana, on the production of phenolic compounds in C. alba seedlings was investigated. It was expected that the oxidative stress caused by the allelochemicals released by both invaders would induce a differential response in the production of phenolic compounds in C....

Teline monspessulana is highly invasive in several countries around the world. This species pressurizes and displaces several native and endemic tree species in south-central Chile such as Nothofagus obliqua, the native species of greatest timber interest. We determined the effects induced by allelochemical stress of T. monspessulana on N. obliqua...

Some chewing larvae are capable of inducing galls in the host vascular cylinder, e.g. Dasineura sp. (Cecidomyiidae) on Peumus boldus stems. Due to the medicinal and economic importance of P. boldus , the anatomical and functional implications of establishment of Dasineura sp. on P. boldus stems were investigated. We asked if establishment of Dasine...

Gall anatomical and metabolic peculiarities are determined by the feeding habit of the gall inducer, but develop under the constraints of the host plants. The chewing habit of the Lepidoptera larvae imposes a high impact on the host plant cells, and supposedly drives peculiar structural and histochemical patterns. So, our starting point was the sea...

Goat milk production has been increasing in northern Mexico; however, there is little information available about its quality. Objective: To compare goat milk quality during three seasons among creole goats in a traditional grazing system and stabled Saanen and French-Alpine goats. Methods: An experiment was performed in a completely randomized nes...

Eucalyptus globulus (Myrtaceae) plantations in Chile are affected by the gall-inducing species Ophelimus migdanorum (Hymenoptera: Eulophidae). Ophelimus migdanorum induces galls on the mesophyll, midrib, margin, and petioles of adult leaves, and young stems of E. globulus, associated with different inducer phenotypes. The structural and cyto-histom...

Red galls have high levels of anthocyanins which perform different physiological functions, such as antioxidants and protection against UVB radiation. High levels of anthocyanins and other polyphenols have been associated with low photosynthetic pigment content. In environments with high levels of UVB radiation, it would thus be expected that red g...

Key message. Dasineura sp. galls develop in the vascular system of Peumus boldus stems, inhibiting phloem and fiber formation and alkaloid and fatty acid synthesis, and fostering compound synthesis towards alkanes. Abstract. Peumus boldus is a native Chilean tree with recognized biological activity, mainly medicinal, insecticidal, and herbicidal, w...

Los primeros estudios anatómicos en plantas se le atribuyen a Theophrastus de Eresus (369-262 AC). Este filósofo y botánico griego fue discípulo de Platón y de Aristóteles. El mismo describió -nítidamente para la épocavarias estructuras vegetales, fundamentalmente corteza, madera y médula de diversos tipos de plantas; sus estudios realizados de man...

Nothofagus obliqua (Nothofagaceae) is a native tree to Chile, which hosts at least seven gall morphotypes, two of them induced by Hymenoptera, Pteromalidae. The life cycle of these pteromalids, particularly the feeding activity of their larvae, has a high impact on host plant tissues toward new shapes and functions, leading the gall formation. The...

Eremanthus erythropappus (DC) McLeisch (Asteraceae), commonly known as “candeia”, is a native species of Minas Gerais state, Brazil, frequently used in medicine as an anti-inflammatory and antimicrobial agent. Eremanthus erythropappus hosts six different gall morphotypes, whose associated inducers manipulate plant cells and tissues and stimulate th...

A historical review of urban and peri-urban agriculture is carried out. Emphasis is placed on the factors that stimulated its appearance. It is emphasized that it is a viable alternative for moments of crisis and to face the challenges of the growing world population, pandemics, syndemics and climate change.

Reactive oxygen species (ROS) are considered the first signaling molecules involved in gall development, linked to the establishment of cyto-histological gradients leading to gall tissue redifferentiation. ROS overproduction induces the failure of gall establishment or its premature senescence. Galls could therefore have efficient mechanisms of ROS...

ABSTRACT. The local knowledge of the wild species that goats consume in the areas surrounding the natural reserves contributes to the establishment of options for livestock production systems associated to the semiarid zones, with a focus on the preservation of the species, the economy of the farmers and the safeguarding of the environment. The obj...

Recientemente, el 17 de marzo de 2020, la prestigiosa revista científica NATURE MEDICINE, acaba de publicar las bases y fundamentos que demuestran la imposibilidad de que el COVID-19 haya sido originado de la manipulación de laboratorios. Este artículo titulado “The proximal origin of SARS-CoV-2” es autoría de reconocidos científicos que desarrolla...

The expression of plant secondary metabolism is strongly controlled by plant both in time and space. Although the variation of secondary metabolites, such as soluble and structural phenolics (e.g., lignins), has been largely observed in gall-inducing insects, and compared to their non-galled host organs, only a few datasets recording such variation...

Volumen 1-Año: 2018 http://bioinvasiones.org/

Environment, plant, and gall-inducing insect genotypes are key factors in determining the morphogenesis of galls. However, the exact roles of these factors have not been clarified. We used anatomical and histochemical methods to evaluate the determining factors in the final structure of galls induced by Calophya mammifex on leaves of Schinus polyga...

The success of galling insects could be determined by synchronisation with host plant phenology and climate conditions, ensuring suitable oviposition sites for gall induction and food resources for their survival. The anatomical, histochemical and phenological synchronisation strategies between Calophya rubra (Blanchard) (Hemiptera: Psylloidea) and...

Autotoxicity is a particular form of allelopathy and is suspected to be responsible for regulating intraspecific competition under the Acacia dealbata Link (Fabaceae) canopy. Was established a bioassay with controlled conditions following the natural patterns of plant material accumulation under the A. dealbata canopy to determine the effects of ch...

Plant species that growth close to or under the canopy of Acacia dealbata Link (Fabaceae, subfamily: Mimosoideae) within its non-native range, survive with difficulty or not at all, especially if they are native. This phenomenon has been attributed to allelopathy; one of the strategies used by A. dealbata to trigger an invasion process. Native spec...

Acacia dealbata (Fabaceae, Subfamilia: Mimosoideae) es una especie australiana que se ha convertido en un invasor agresivo en regiones templadas de varias partes del mundo, amenazando la biodiversidad nativa debido a su presión colonizadora; así como a ecosistemas y agroecosistemas. Dicha especie se basa en un entramado de atributos funcionales, qu...

There are several methods to detect phytotoxic effects of metabolites from plants. Generally, organic compounds are pre-dissolved in organic solvents and then in water to bioassay its activity on target plants. However, compounds solubility and pH in water after removing solvents are not totally controlled. Other bioassays are performed using DMSO...

http://www.ecoportal.net/Temas-Especiales/Biodiversidad/Impactos_de_las_invasiones_de_plantas_en_las_islas_oceanicas_El_caso_de_Dichrostachys_cinerea_L._Wight_Arn Existe preocupación global debido al impacto provocado por las especies de plantas invasoras, las cuales tienen la capacidad de diseminarse y adaptarse con facilidad a diversos hábitats....

http://www.leisa-al.org/web/revista-leisa/112-vol27n2.html#Comunidad_Pronaturaleza

The regeneration potential of D.alata L. germplasm preserved in vitro was compared with the micropropagation of fresh material. Nodal cuttings were conserved for 9 months in different treatments based on D-571 culture medium modified, using several variable components (mannitol, benzylaminopurine and activated charcoal). Regeneration at 8 weeks, as...

RESUMEN. La fenolización es el principal inconveniente para el establecimiento in vitro del ñame, en época no óptima, durante los primeros subcultivos del material vegetal. En el presente trabajo se estudió el efecto de la adición de distintos antioxidantes (cisteína, 20 mg/L; ácido cítrico, 100 mg/L, ácido ascórbico, 100 mg/L y polivinilpirrolidon...