Abstract:In the present study, wheat water extractable arabinoxylans (WEAX) were isolated and characterized, and their capability to form covalently cross-linked films in presence of Debaryomyces hansenii was evaluated. WEAX presented an arabinose to xylose ratio of 0.60, a ferulic acid and diferulic acid content of 2.1 and 0.04 µg•mg
La antracnosis, ocasionada por Colletotrichum spp., es una de las principales enfermedades del aguacate que afecta la calidad del fruto y merma su producción. En los últimos años se han reportado dificultades para la prevención y erradicación de esta enfermedad. Por ello, el objetivo del presente trabajo fue identificar y caracterizar cepas de Colletotrichum spp. como agente causal de antracnosis en el aguacate ‘Hass’., mediante estudios morfológicos, patogénicos y moleculares, a partir de aislamientos provenientes de las principales zonas productoras de aguacate del estado de Nayarit, México. Se recolectaron frutos con síntomas típicos de la enfermedad, colectados en cuatro ejidos pertenecientes a los municipios de Xalisco y Tepic, Nayarit, México. Se obtuvo una colección de 20 aislamientos, de los cuales 13 son de C. gloeosporioides, una C. hymenocallidis, cinco C. siamense y una de C. tropicale, siendo la más patógena el Colletotrichum gloeosporioides. Es importante destacar que este es el primer reporte de C. hymenocallidis y C. siamense en aguacate.
The objective of this study was to evaluate the effect of irrigation with yeasts (Debaryomyces hansenii var. Fabry, Yarowia lipolytica YIBCS002, Yarowia lipolytica var. BCS and Candida pseudointermedia) on the final nutritional content of hydroponic green maize fodder (Zea Zea mays L.), applied at different fodder growth stages (1. seed-seedling stage, 2. seedling-plant 20cm, 3. during all the culture). Irrespective of the fodder growth stages at which they were applied, all yeasts tested enhanced the content of raw protein, lipids, ash, moisture and energy. The percentage of electrolytes (Na, K, Cl, sulphates, Ca and Mg) showed different responses depending on the kind of yeast applied; D. hansenii exhibited the highest increment in all electrolytes, except for phosphorous. We conclude that the addition of yeasts belonging to the genera Debaryomyces, Candida and Yarowia to the irrigation solution of hydroponic systems enhances the nutrient content of green fodder. This kind of irrigation can be applied to generate high commercial value cultures in limited spaces.
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