Los hongos formadores de micorrizas arbusculares son microorganismos del suelo .. El aislamiento y cuantificación de esporas por la técnica de Gerdeman y. AISLAMIENTO E IDENTIFICACIÓN MOLECULAR DE HONGOS MICORRÍZICOS DE TRES ESPECIES DE ORQUÍDEAS EPÍFITAS (Cyrtochilum myanthum. Abstract. AGUILAR-ULLOA, Wendy; ARCE-ACUNA, Priscilla; GALIANO- MURILLO, Fiorella and TORRES-CRUZ, Terry J.. Spore isolation and evaluation of.

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Directory of Open Access Journals Sweden. Los experimentos se diferenciaron por las fuentes de P utilizadas. In the first two works la and lb we evaluated the interation between selected stumps of Rhizobium appropiate for the tropical forage legumes Centrosema macrocarpum and species Entrophospora colombiana, Acaulospora longula, Glomus manihotis of vesicular- arbuscular mycorrhiza MVA, in a sterelize soil fixer of P.

The two experiments are different because we used different P sources. Rhizobium and chemical N levels equivalent to 0, La Amazonia colombiana es considerada uno de los centros de origen y alberga una gran riqueza de morfoespecies. A bibliographical review of the origin and diversification of mycorrhizae is made. The aislaimento characteristics of aislamlento arbuscular mycorrhiza formed by Glomeromycota are discussed, emphasizing its importance during the terrestrialization processes.

The chronological appearance of the other types of mycorrhizas is discussed. The independent and recurrent evolution of the ectomycorrhizas formed by Basidiomycota and Ascomycota is discussed; their saprobiont or parasite origin points to the versatile nutritional strategy of these fungi, in adaptative response to environmental changes, as does the origin of the singular ericoid, arbutoid and helianthemoid mycorrhizas.

Finally, the recent evolution of the non mycotrophic root systems is commented on. Se analizaron las variables: Las plantas inoculadas con Glomus spp. DDH hybrid were assessed in Oxisol pot experiment. Maize was grown inoculated with spores of VAM fungi Glomus mosseae or non-inoculated. Low soluble ferrous phosphate FePO4. The dry weight of mycorrhized plants with added phosphate P were higher than in mycorrhized plants without added P or non-mycorrhized plants with added P.

The amount of P in the soil samples from pots with mycorrhizal plants fertilized with P was evidently smaller than those in samples also fertilized non-mycorrhizal plants. The percentage of P was higher in tissues of fertilized mycorrhial plants than in those mycorrihzed plants without or nonmycorrhized plants with added low-soluble P.

These results indicated that plants in VAM symbiosis mobilize P better from low-soluble P than non-mycorrhized plants. DDH hybrid cultivadas en un Oxisol. Full Text Available Capsicum sp. Se identificaron nueve morfotipos de endomicorrizas; Glomus sp. Micorrrizas preliminary study to determine the character obligate or facultative of the mycorrhizal association in, “naranjilla” Solanum quitoense L.

The “naranjilla” is a facultative mycotrophic specie.

In general, the inoculation with MVA fungi, increased the development of the “naranjilla” in seed beds as well as transplanted seed lings. The effectivity of MVA was dependent on the fungus specie, its origin, the phosphorus levels in the soil and the weather of both Iocalities. In general, the isolations which showed the best behavior were a mixture of Acaulospora spp and Glomus sp, and.

Hill ex Maiden, E. The succession between the two fungi was observed. In general ectomycorrhizal colonization increased followed by a decrease in AM. Pisolithus tinctorius was favored in simultaneous inoculation with G. After days, colonization of roots by G. When inoculated simultaneously, the proportion of AM and ECM varied with evaluation time, while the combined percentage of mycorrhizal roots approached the maximum and remained more or less constant after 60 days, suggesting that there could be competition between the fungi for limiting substrate.


The maximum percent mycorrhizal colonization varied with Eucalyptus species and the highest value was observed for E. Colombia por la micorriza vesiculo- arbuscular. Treatments using nutritional solutions formed a factorial 2 by 5, with and without inoculation plus 5 P levels 20, 30, 40, 50 and 80 ppm. Glomus manihot was inoculated having spores per plant, applied to the root when the were transplanted, Random complete blocks in split plots was the design used.

Determinations were made at 60, and days after transplants were made. Results in nutritional solutions showed that small coffee plants var. Colombia, have different dependence degrees to the 20 and 30 P ppm and were absolutely dependent to VAM.

In soil, at days, the development of inoculated plants was greater for all P levels, In uninfected soil the plants do not take P and do not grow, except in they were inoculated; such high VAM dependence was evident also in micorrizax P levels. Ailsamiento en proporciones de In order to reduce environmental pollution, a mix of ethanol gasoline has been used; however, the ethanol production generates vinasse, a pollutant in water.

Because vinasse has a high concentration of K and. Neste sentido, o objetivo deste trabalho foi avaliar o crescimento de mudas de Mimosa caesalpiniaefolia Benth. Manganese Mn is considered ajslamiento essential micronutrient to plants but its excess can result in toxicity causing chlorosis and necrosis on.

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Muell plantations micorrizas the north littoral of Bahia, Brazil. The arbuscular mycorrhizal are known and explored long ago due to the ecological significance and the effects in the growth and nutrition of the plants. Muell, particularly in the studied sites, exhibit differenced behaviour when compared with other eucaliptus species, establishing in sites of the poor soils and sandy texture, with micorgizas growth, difficulty to formation of the seedling and nutritional problems.

Aiming to evaluate the percentage of mycorrhizal colonization, as well as the density of arbuscular mycorrhizal fungi spores in E.

The mean results of percentage root colonization ranged from 10 to Simbiosis de micorrizas arbusculares en plantas de arroz Oryza sativa L. The roots of Miconia ioneura and Tibouchina paratropica Melastomataceae were studied for fungal symbionts colonization. Typical structures of ‘Paris’ intracellular hyphae and coils and ‘Arum’ intercellular hyphae and arbuscules arbuscular mycorrhizal types were observed and are described here.

Dark septate fungi hyphae and sclerotia were also observed. The occurrence of both types of arbuscular mycorrhizal colonisation and dark septate fungi in the roots of species belonging to Melastomataceae is reported for the first time.

The possible ecological and evolutionary implications of the co-occurrence of these mycorrhizal colonisation types in the same species are discussed. X Poncirus trifoliata L. This study was carried out in Alcanar Tarragona – Spain to evaluate the effect of five indolebutyric acid IBA concentrations 0. The experimental design was in a Completly Randomized Block Design with 10 seedlings per plot and 4 replicates.

The IBA concentrations had no effect on vegetative development of nonmycorrhizal seedlings, althougt it had increased P and K foliar contents and primary xylem tickness.

las micorrizas arbusculares: Topics by

AMF increased P foliar content. IBA x AMF interaction was observed, increasing IBA concentrations on mycorrhizal seedlings resulted in increased in vegetative development, P and K foliar contents and primary xylem thickness. El objetivo de este estudio fue evaluar la capacidad extractora de Plomo Pb y Cadmio Cd del quelite Amaranthus hybridus L. En el primero se adicionaron tres cantidades de micorrizas 0, 2. Se establecieron seis tratamientos: A greenhouse experiment was carried out in order to monitor the infection, VAM fungi sporulation and the influence of micorrhiza inoculation on Colombia coffe cultivar.


The following treatments were set up: Plantas de tres meses de edad fueron sometidas a cuatro tratamientos: Arbuscular mycorrhizal infection in two morphological root types of Araucaria araucana Molina K. Koch is a conifer distributed in the Andean-Patagonian forests in the south of Argentina and Chile. The main objective of this work was to relate the different root classes appearing in A.

Two different root classes were present in A. Both had extensive mycorrhizal arbuscular symbiosis AM and presented abundant hyphae and coils in root cells, a characteristic of the anatomical Paris-type.

Dark septate fungal endophytes were also observed. Seasonal differences were found for total and partial colonization, with higher values in spring compared to autumn. Regarding the percentage of fungal structures between root classes, values were similar for vesicles and arbuscules, but higher coil percentages were observed in GSR compared to LFR.

The percentages of vesicles increased in autumn, whereas the arbuscule percentages increased in spring, coinciding with the plant growth peak. Results show that both root classes of A. Para las variables de crecimiento no se encontraron diferencias.

An alternative of ecological fertilization in pastures.

Because of the negative effects caused by chemical fertilizers on the deterioration of the environment, work has been done, for some decades, in the introduction of fertilization alternatives in crop management. Mycorrhization is one of the biological techniques used in many of them; however, in pastures it has not been widely extended in production and the studies have aimed at legumes and very few grasses.

Mycorrhizae allow successful application by means of seed covering. On the other hand, mycorrhizal relationships can aislzmiento the key to decrease the amount of fertilizers especially phosphates. The effect aislamienfo mycorrhizae formed by Glomus etunicatum on the kinetic parameters of P absorption by the roots and on P influx in bean plants of the Aielamiento cultivar was evaluated, in two distinct plant development periods: A mixture of sand and silica 9: The kinetics assay was performed by the method of 32P depletion from the solution depletion curve, using intact plants.

Mycorrhization promoted greater growth and P absorption by bean plants, which was more iaslamiento observed at the pod-filling stage. Mycorrhizal plants showed higher values of maximum aislwmiento uptake rate Vmax and net P influx at the flowering micordizas. Lower minimum ion concentration Cmin and Michaelis-Menten constant Km values were verified in mycorrhizal plants at the pod-filling stage.

Mycorrhizal plants also presented higher net P influx per plant, in both stages. Cmin was the kinetic parameter more intimately related to P absorption, and a significant correlation was obtained between this parameter and shoot P content and accumulation in micorrizws plants.

Full Text Available En el campo se dispuso de dos preparaciones de suelo: La presencia de la MVA, incluyendo G. Este producto es el que menos afecta la simbiosis en el suelo desinfectado.

With the object to evaluate in the soybeans crop behavior in the interaction of Rhizoctonia solani, vesicular- arbuscular mycorrhizae VAM and fungicides used to treatment of seed, two different soil preparations were used in the field trials: Be had into account the natural mycorrhizal flora and a source of Glomus manihotis introduced.