Hilda Araceli Zavaleta-Mancera

Postgraduate College in Agricultural Sciences · BOTANY AND ELECTRON MICROSCOPY

Sansevieria trifasciata is used as an indoor plant, in traditional medicine and as a fiber source. Here we characterized fibers of two of varieties of S. trifasciata, Lorentii and Hahnii, and report a protocol for their propagation based on indirect shoot organogenesis. Structural and ribbon fibers were scattered within leaf parenchyma when viewed...

Our research aimed to study the correlation between the SPAD-502 readings and the color space CIE L*a*b* values in two cultivars of Alstroemeria sp. during leaf senescence and to evaluate the statistical criteria used in the selection of the best fit calibration functions. We demonstrate the importance of the Akaike information criterion and the pa...

El objetivo del presente trabajo fue identificar metabolitos producidos por bacterias solubilizadoras de fosfato (BSP) aisladas de la raíz y rizoplano de gramíneas, y determinar la capacidad de tres cepas de Burkholderia para colonizar las raíces de avena, cebada, trigo y maíz. Se aislaron 147 BSP, el medio de cultivo denominado Medio Mínimo para S...

El duraznero es un componente estratégico de la Milpa Intercalada con Árboles Frutales (MIAF) por el alto precio del fruto en épocas de escasez, en la que su producción es limitada por el daño que le causan las heladas. El patrón de floración del duraznero es acrópeto y las temperaturas en una helada de radiación son más bajas en el estrato inferio...

Mexico is the fourth largest producer of mango and the leading exporter worldwide, and cv 'Ataulfo' is the largest area sown in the country. New cultivars are required to maintain production, ensure competitiveness, and mitigate problems with pests and diseases. The purpose of the present study was to identify microsatellite (SSR) markers in zygoti...

Key message Mimosa luisana seeds germinate after 7 years of storage, suggesting that they have a long span life; an interesting characteristic for environmental restoration of semi-arid zones. Abstract Mimosa luisana is endemic to Mexico, provides ecosystem services and is economically and culturally important. This species exhibits morphological,...

The increased use of silver nanoparticles (AgNPs) is expected to result in negative environmental impact, particularly on aquatic ecosystems. The effect of AgNPs to aquatic plants has received little attention. Azolla filiculoides is an interesting aquatic fern with phytoremediation capacities. Therefore, the objective of this research was to evalu...

En México el fruto de vainilla (Vanilla planifolia Jacks. ex Andrews) se cosecha a partir de las 32 semanas después de la polinización (SDP). Sin embargo, los altos precios del fruto han llevado a cosecharlo poco después de las 20 SDP con efectos negativos en la calidad del fruto beneficiado. Por ello, con la finalidad de proporcionar información a...

Premise: Of all orchid species described, 70% live on phorophytes. Trees offer a vital space with characteristics that influence the successful establishment and life cycle of orchids. Field inventory and distribution analysis suggest that phorophyte selection is biased to certain tree species that would serve as better hosts. Phorophyte bark is k...

Pectin is a polysaccharide present in food, its basic structure is an anhydro-D-galacturonic acid chain with α 1,4-bonds with methylated carboxyl groups (COOH) that allow the pectin to form a viscous gel and bind with the β-carotene in the intestine and decreases its absorption, consequently it could reduce the yellow color of the covering fat in t...

El huanglongbing (HLB) es la enfermedad más devastadora de los cítricos a nivel mundial y está presente en el estado de Colima desde 2010, zona productora de limón mexicano (Citrus aurantifolia). Esta enfermedad causa un desequilibrio en el reparto de carbohidratos e inhibe la fotosíntesis. También afecta la concentración de nutrientes en hoja. El...

BACKGROUND There is a growing interest in the development of novel and innovative controlled release vehicles for urea into the rumen, aiming to provide ammonia‐N for the biosynthesis of proteins of bacterial origin and to prevent urea intoxication by direct feeding to livestock. Urea microencapsulation is a system that can control the release of u...

The seeds of Annona macroprophyllata Donn. Sm. contain idioblasts with toxic acetogenins, including laherradurin and rolliniastatin-2, in relatively high proportions. Both metabolites are cataloged as potent insecticides for several species, even so, the wasp Bephratelloides cubensis Ashmead fulfills almost its entire life cycle inside the seeds of...

Mechanization of postharvest handling and conditioning inflicts damage on the physical, physiological, and sanitary qualities of corn (Zea mays) seeds, resulting in significant economic loss. The mechanical damage is related to the compression strength and strain, and therefore to the moisture content (MC) and endosperm type. This study was conduct...

The anatomical aspects of vascularization and distribution of starch during the morphogenesis of the floral bud are unknown for Prunus persica (L.), and this knowledge helps to predict the degree of vascularization and susceptibility of the bud to cold temperatures. The aim of the present study was to compare the differentiation of the xylem and th...

The silver nanoparticles (Ag NPs) in the vase solutions are antimicrobial agents and ethylene inhibitors in some species for cut flowers, but the combined effect of sucrose and citric acid remains uninvestigated. The biosynthesis of Ag NPs with plant extracts is an efficient and ecologically friendly method. The objective of the present study was t...

The anatomical aspects of vascularization and distribution of starch during the morphogenesis of the floral bud are unknown for Prunus persica (L.), and this knowledge helps to predict the degree of vascularization and susceptibility of the bud to cold temperatures. The aim of the present study was to compare the differentiation of the xylem and th...

The ‘Poblano’ pepper crop is economically important in Mexico and throughout the world as it is used as a hot spice in food. The cultivated area of the ‘Poblano’ pepper crop is decreasing yearly for many reasons, among them a wilt disease commonly associated with Fusarium spp. This disease is a problem of field and greenhouse production plants. Mor...

To our knowledge, there are no studies about the structure and ecological function of extrafloral nectaries (EFNs) in Opuntia robusta. This is the first description of EFNs in O. robusta, where young spines have an interesting structure and a secreting function, which are different from EFNs described in other Cactaceae species. We used light, scan...

To our knowledge, there are no studies about the structure and ecological function of extra- floral nectaries (EFNs) in Opuntia robusta. This is the first description of EFNs in O. robusta, where young spines have an interesting structure and a secreting function, which are differ- ent from EFNs described in other Cactaceae species. We used light,...

The relationship between relative air humidity and air temperature (A) or sampling time (B), and between air temperature and sampling time (C). (PDF)

The relationship between cladode length (A), width (B), or thickness (C) and air temperature, as well as between cladode length (D), width (E), or thickness (F) and relative air humidity. (PDF)

The number of ants observed on sprouts with a given size (length, width, thickness), together with air temperature and humidity recorded at the moment of sampling. (XLSX)

Ants’ activity on cladode sprouts. Ants searched mainly the apical secretory cones of young spines in areoles. We observed the secretion of transparent liquid, which attracted and fed ants. (MP4)

Fluorescent staining for Callose of sieve tubes of phloem. Calose (β-1→3-glucan) is the distinguished polysaccharide present on the sieve plates, of each sieve tube member of phloem tissue. Aniline blue stain specifically callose and it is use as a marker for identification of sieve elements of phloem. PROCEDURE – STAINING FOR CALLOSE WITH ANILINE...

Estudio de la identificacion y caracterización de los agroecosistemas donde se producen algunas especies del genero Vainilla en la region del Totonacapan México

The presence and structure of EFNs in Opuntia robusta had not been investigated. We used light, scanning-electron, and transmission-electron microscopy to examine morphology, anatomy, and ultrastructure of the secretory spines in areoles in female and hermaphrodite individuals of O. robusta. Young cladodes develop areoles with modified and secretor...

The presence and structure of EFNs in Opuntia robusta had not been investigated. We used light, scanning-electron, and transmission-electron microscopy to examine morphology, anatomy, and ultrastructure of the secretory spines in areoles in female and hermaphrodite individuals of O. robusta. Young cladodes develop areoles with modified and secretor...

The presence and structure of EFNs in Opuntia robusta had not been investigated. We used light, scanning-electron, and transmission-electron microscopy to examine morphology, anatomy, and ultrastructure of the secretory spines in areoles in female and hermaphrodite individuals of O. robusta. Young cladodes develop areoles with modified and secretor...

La calidad física, fisiológica y sanitaria de la semilla se reduce debido al daño mecánico ocasionado por la mecanización del proceso de beneficio. Conocer los valores críticos de la fuerza y el desplazamiento a la compresión en función del tipo de endospermo, permitirá ayudar a disminuir el daño durante dicho proceso de limpieza, secado, almacenaj...

Pasto banderita (Bouteloua curtipendula (Michx.) Torr.) es un forraje C4 de gran diversidad genética, adaptado a regiones áridas y semiáridas del norte de México y sur de los E.E.U.U. En este estudio se evaluaron los atributos histológicos asociados con digestibilidad y lignificación en 30 genotipos de B. curtipendula de México para conocer su pote...

Mammillaria plumosa es una cactácea mexicana altamente apreciada como planta ornamental por su peculiar morfología. La extracción desmedida y el saqueo de sus poblaciones silvestres han forzado su protección y actualmente se encuentra clasificada como una especie en peligro de extinción. Ante esta crítica situación el presente trabajo se planteó co...

The seed of the Mexican species, Casimiroa edulis Llave et Lexarza is valued for medicinal purposes. We have studied its anatomy in different stages of development from ovule to mature seed. We applied general staining with safranin and fast green and specific staining for the detection of starch, lipids, lignin, polyphenols, and proteins. Embryo a...

La anatomía foliar de 32 ecotipos de pasto Azuche, Hymenachne amplexicaulis (Rudge) Nees, nativos de México fue comparada con el objetivo de identificar atributos forrajeros valiosos dentro de la diversidad genética. El material vegetal fue obtenido de una colección de pastos establecida y evaluada por el Colegio de Postgraduados en el Campo Experi...

The leaf anatomy of 32 ecotypes of Azuche, Hymenachne amplexicaulis (Rudge) Nees pasture grass native to México was compared to identify valuable forage attributes within the native genetic diversity. Plant material was obtained from a pasture collection established and evaluated by the Colegio de Postgraduados at La Huerta, Jalisco experimental st...

Sideoats grama (Bouteloua curtipendula (Michx.) Torr.) is a C4 forage species of great genetic diversity, adapted to arid and semi-arid regions of Northern Mexico and Southern U.S.A. In this study the histological attributes associated with digestibility and lignification were evaluated in 30 genotypes of B. curtipendula of Mexico to know their for...

Ustilago maydis is a basidiomycete known as the causative agent of ‘common smut’, worldwide disease of maize that is recognized by the galls it forms, which have considerable potential as a gourmet food. Results of infection are quite variable, even under optimal greenhouse conditions. In order to find pathogenic strains able to be used as a highly...

Nanoparticles of ZnO are disposed of in the environment and abound in wastewater, but their toxicity to plants is little known. The objective of this study was to evaluate the physiological response of Azolla filiculoides to the presence of two ZnO particle sizes: analytical grade nanoparticles (NPs, 26.7 +/- 1 nm) and pharmaceutical grade submicro...

div class="title"> Effect of Arsenic on Chloroplast Ultrastructure in Azolla filliculoides Lam - Volume 22 Issue S3 - HA Zavaleta-Mancera, LG Ortega-Ramírez, LF Jiménez-García, G Sánchez-Viveros, A. Alarcón

The physical, physiological and sanitary qualities of corn seeds are reduced due to the mechanical damage caused by the mechanization of the production process. Knowing the strength and displacement critical values according to the type of endosperm will help decrease the damage during the cleaning, drying, storing and handling processes. This stud...

In this work, we present an ultrastructural and physiological description of a novel chlorophyll-deficient, yellow cell line of the grass Bouteloua gracilis that develops etioplast-like plastids in presence of light (YELP). These mutant cells were compared to the parental, wild-type, highly chlo-rophyllous cells from which they were isolated. Growt...

There are many ways to obtain metal nanoparticles: biological, physical, and chemical ways and combinations of these approaches. Synthesis assisted with plant extracts has been widely documented. However, one issue that is under discussion refers to the metabolites responsible for reduction and stabilization that confine nanoparticle growth and pre...

Several basal MS culture media added with different auxins were tested on induced calli to promote normal plant regeneration, using mature caryopsis of sideoats grama Bouteloua curtipendula (Michx.) Torr. as explants. The induction media was supplemented with 2,4-diclorophenoxiacetic acid and several cytokinins. Basal MS + 2,4-D + BAP media supplem...

Several basal MS culture media added with different auxins were tested on induced calli to promote normal plant regeneration, using mature caryopsis of sideoats grama Bouteloua curtipendula (Michx.) Torr. as explants. The induction media was supplemented with 2,4-diclorophenoxiacetic acid and several cytokinins. Basal MS + 2,4-D + BAP media supplem...

In Mexico, the frosts matching with the blooming and fruit set of peach plants [Prunus persica (L.) Batsch] affect their productivity; nevertheless the use of early cultivars grafted on late ones (bi-cultivar composition) can reduce the frost damages on flowers and fruits, unlike early uni-cultivar trees alternated with late cultivars. Because of t...

In Mexico, the frosts matching with the blooming and fruit set of peach plants [Prunus persica (L.) Batsch] affect their productivity; nevertheless the use of early cultivars grafted on late ones (bi-cultivar composition) can reduce the frost damages on flowers and fruits, unlike early uni-cultivar trees alternated with late cultivars. Because of t...

Resumen: En México, las heladas que coinciden con la floración y el amarre del fruto del duraznero [Prunus persica (L.) Batsch] afectan su productividad y el uso de cultivares precoces injer-tados sobre cultivares tardíos (composición bicultivar) puede atemperar el daño por heladas en flores y frutos a diferencia de árboles unicultivares precoces a...

In Mexico, citrus fruit crops are affected by plague and diseases leading to yield decrease. The traditional genetic improvement would allow to obtain resistant materials in citrus; however, it is necessary to identify germplasm with the needed resistance and to identify the hybrid among the nucellar seedling emerging from the seed. An alternative...

Chile piquin (Capsicum annum cv. glabriusculum) consumed in Mexico is usually harvested from wild grown plants. This activity might threaten the genetic diversity in this species. However, chile piquin germination has traditionally been difficult for intensive greenhouse sowing. The causes for such behavior are unknown. Accessions from seven produc...

Chile piquin (Capsicum annuum cv. glabriusculum) consumed in México is usually harvested from wild grown plants. This activity might threaten the genetic diversity in this species. However, chile piquin germination has traditionally been difficult for intensive greenhouse sowing. The causes for such behavior are unknown. Accessions from seven produ...

Biosynthesis of silver nanoparticles (AgNPs) was achieved using extract of Chenopodium ambrosioides as a reducer and coating agent at room temperature (25∘C). Two molar solutions of AgNO3 (1 mM and 10 mM) and five extract volumes (0.5, 1, 2, 3, and 5 mL) were used to assess quantity, shape, and size of the particles. The UV-Vis spectra gave surface...

The objectives of this investigation were a) to determine the best concentration of chitosan to reduce Alternaria alternata development in relation to mycelial growth, germination and sporulation, b) to observe through scanning and electron microscopy the effect of chitosan level at the morphological and cellular level and c) to evaluate the effici...

Producción de semillas/ w Fitosanidad/ Colegio de Postgraduados, Km 36.5 Carretera México-Texcoco. Montecillo, México. 56230. * alexge@colpos.mx Palabras Clave: limón persa, triacontanol, ácido-4-fluorofenoxiacético, sulfato de adenina, adenina, callo, puntos meristemáticos. La regeneración in vitro de brotes, particularmente mediante la organogéne...

En este artículo se describen los conceptos de Nanociencias, Nanotecnología, nanómetro y nanopartículas (NPs), abundan