| Summary: | 102 p The presence of an excessive amount of cadmium in the soil causes various symptomatology in plants, such as reduced growth especially root growth alterations in mineral nutrition and carbohydrate metabolism and can therefore strongly reduce biomass production. This reduction of the biomass due to the toxicity of cadmium (Cd) could be one of the most important consequences in the inhibition of chlorophyll synthesis and in the decrease of the photosynthetic rate of the plants. That is why the association of arbuscular mycorrhizal fungi with the plant confers nutritional benefits and resistance to different stress factors, both biotic and abiotic. The objective of the present was to study the capacity of photosynthetic production in plants of Heliconia psittacorum in association with mycorrhizal fungi under light and shade conditions, in three soils naturally impacted by cadmium (0.96, 1.075, 18.83 ppm) present in the native soils of San Vicente de Chucuri. In this work the response variables were evaluated such as mycorrhizal symbiosis, total chlorophyll amount, physiological differences in leaf growth and stem length and quantification of root biomass. The factors evaluated allowed to show that each of the treatments for each factor such as concentration of cadmium, inoculated and light source is correlated and present significant differences among themselves. In conclusion, the use of mycorrhizae in soil contaminated with cadmium increases the photosynthetic capacity and favors the growth and development of the plant as well as its root biomass, since this symbiosis retains help to retain cadmium, preventing it from being disturbed to other parts of the soil. The plant, likewise it is important to mention that the photosynthetic rate was not affected by the concentration of cadmium present in the soil. La presencia de una cantidad excesiva de cadmio en el suelo causa diversas sintomatologías en las plantas, como la reducción del crecimiento, especialmente el crecimiento de la raíz, alteraciones en la ...
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