Antonio Larios Guzmán

The zoapatle. XI: Effects elicited by Montanoa tomentosa and Montanoa frutescens on rat uterine strips

Zoapatle aqueous crude extract (ZACE) obtained from Montanoa tomentosa (M.t.) inhibits the in vitro spontaneous contractility pattern of rat uterine tissue. The opposite effect was observed with ZACE from Montanoa frutescens (M.f.) in the same preparation. Both plant extracts, M.t. and M.f., increased the in vitro spontaneous contractility pattern in the uterine guinea pig assay. In depolarized uterine tissue, propranolol (beta-blocker) inhibited the relaxing effect induced by M.t.. Atropine (cholinergic antagonist) abolished the increase in uterus contractility produced by the presence of M.f.

The zoapatle VII. Antiimplantation effect in the rat of zoapatle aqueous crude extract (ZACE) from Montanoa tomentosa and Montanoa frutescens

Intrauterine administration of zoapatle aqueous crude extract (ZACE) from Montanoa frutescens on the fourth day of rat pregnancy, at concentrations equivalent to 50 mg and 5 mg of dry leaves, was associated with total inhibition of implantation sites. On the other hand, ZACE from Montanoa tomentosa equivalent to 50 and/or 100 mg of dry leaves, prepared and administered in the same fashion, did not inhibit the number of implants by day 11 of pregnancy. However, most implants were found abnormal, of blue color, poor orientation or spacing; these morphological changes could be considered as reabsorption sites.

The zoapatle. IX. In vitro effect of Montanoa tomentosa and Montanoa frutescens upon human sperm and red cells.

The effect of zoapatle aqueous crude extract (ZACE) was further studied and partially characterized upon human and rabbit spermatozoa. ZACE prepared from Montanoa tomentosa s.s.p tomentosa did not influence sperm motility or viability in a wide range of ZACE concentrations tested; on the other hand, ZACE prepared from Montanoa frutescens had immediate and constant inhibitory effect upon motility and decreased cell viability. Red cell lysis was readily observed with ZACE-frutescens, but not with ZACE-tomentosa. The effect of time on ZACE-frutescens potency for inducing red cell lysis was observed.

Nutrición orgánica del aguacate cv. "Hass" y efecto nutrimental y agronómico

El aguacate organico de Michoacan alcanza ya unas 6 000 ha, es una alternativa al aguacate convencional debido a que puede ser de menor impacto ambiental sobre todo en el aspecto fitosanitario y nutricional. El objetivo de este trabajo fue evaluar la nutricion organica del aguacate y su efecto en algunas variables agronomicas del cultivo. El trabajo se desarrollo en la Huerta “El Rosario” ubicada en el municipio de Nuevo Parangaricutiro, Michoacan, en arboles con ferti-riego de ocho anos de edad. Se evaluaron productos organicos para nutricion agrupando por su origen. Los tratamientos fueron 1. Fermentos organicos (FO); 2. Derivados de pescado (DP); 3. Composta organica (CO); 4. Micro-organismos (MO); 5. Lombricomposta (LC); y 6. Testigo convencional (T). El diseno experimental fue bloques al azar con 8 repeticiones, fungiendo un arbol como unidad experimental. Las variables agronomicas evaluadas fueron: disponibilidad de nutrientes en solucion del suelo, crecimiento del tronco y fruto, longitud de brote vegetativo, porcentaje de floracion y amarre, rendimiento de fruto y contenido nutricional foliar. Los resultados indican en general, que la nutricion organica es una alternativa viable para obtener alta concentracion nutricional en suelo y foliar, valores adecuados de amarre y crecimiento de fruto, tronco y brotes vegetativos, floracion y rendimiento de fruto.