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The use of conglomerate for the development of mycorrhizal inoculants is very important to develop a variety of commercial products made from these microorganisms. According to this a experiment was conducted in order to compare the effect of two mycorrhizal inoculants on growth, development and gasses interchange of maize plants. The experiment was developed under a completely randomized design and the inoculants proved were the first constituted by Glomus cubense specie and the other one was a conglomerate of species (Consorcio Selva). Different mycorrhizal (intensity and frecuence), physiological (stomatal conductance, photosynthetic rate) and growth (height, stem diameter and dry mass) indicators were evaluated. Not differences were detected among the inoculants employed on growth indicators, but in mycorrizal parameters the conglomerate (Consorcio Selva) presented the highest values of the indicator; however, an interesting behavior was observed using Glomus cubense inoculants due to the values obtained for this inoculants were comparable to control, but the effect of this specie was the best obtained on gas exchange variable. These results point to the highest efficiency of this specie and to the functional differences between species on ecological point of view, and they open the possibility of using of cluster in field's condition. [ABSTRACT FROM AUTHOR]

The physiological response of tomato crop (Lycopersicon esculentum) cv INCA 9 (1) was studied after applying two inoculant forms made up of Glomus sp1 (INCAM 4): one in a solid medium and the other in a liquid medium. The solid inoculant was directly put in the substrate of the pots at a single dose and time, whereas the liquid inoculant was sprayed by means of drop irrigation system at different doses and times. The experiment was carried out in a cooling-equipped polycarbonate greenhouse for temperature and relative humidity control. Results showed that the highest colonization and fungal occupation percentages were reached 40 days after seed germination in the liquid inoculant treatments. Soil moisture values were similar in all treatments, indicating that an adequate irrigation regime was supplied to plants, in order to guarantee the same water requirements during all the experimental period. In general, the values of water relations, gas exchange, dry biomass growth and morphological growth variables were higher when plants were treated with the liquid inoculant through irrigation, independently of the dose and time used. [ABSTRACT FROM AUTHOR]