Simbiosis de micorrizas arbusculares en plantas de arroz (Oryza sativa L.) en condiciones de inundación y secano

Abstract

The research was conducted in the Scientific Technological Base Unit Los Palacios, Cuba, located at 22° 34' 32.73" N and 83° 34' 32.73″ 14'11,95″ W, with the objective of evaluating the effect of flooding on colonization by arbuscular mycorrhizal fungi during the vegetative phase of rice plants, cultivar INCA LP-5. Two experiments under greenhouse conditions in pots with a capacity of 800 g of soil, both experiments in a completely randomized design were performed. An experiment was performed with Rhizophagus (=Glomus) intraradices (Ri), where the dynamics of colonization of mycorrhizal symbiosis in flooded conditions was evaluated and not flooded. In the second experiment, we worked with Glomus cubense (Gcb) and mycorrhizal colonization was evaluated in rice plants grown with different levels of water depth. In both experiments, plant height, the absolute dry weight and growth rate are evaluated. The obtained results showed that the rice plants were colonized from 35 days after germination, both flooded and non-flooded conditions, with an increasing trend over time. It was found that mycorrhizal colonization decreased in flood conditions and as the height of the water level was higher, lower values of this indicator was found. Mycorrhizal colonization increased the development of rice plants.