Avaliação morfofisiológica de mudas de pinhão manso Jatropha curcas L. inoculadas com fungos micorrízicos arbusculares submetidas a déficit hídrico

Abstract

Physic nut, Jatropha curcas L. has been considered a promising crop for the production of oil and the production of biofuel, Mycorrhization is a technique that promotes the symbiotic association between plant-fungus, so that these microorganisms contribute to the increase in root extension through their hyphae and thus can contribute to the absorption of water and nutrients and thus contribute to increased drought tolerance. That said, the objective was to evaluate the morphological development, gas exchange and biomass of physic nut seedlings inoculated with three types of isolated mycorrhizae, submitted to water stress. The present experiment was conducted in a protected environment, the experimental design used was in randomized blocks, arranged in a 2x4 factorial, corresponding to two water regime conditions (with and without irrigation), four treatments where (M0) not inoculated, (M1) Gigaspora albida,(M2) Claroideoglomus etunicatum and (M3) Rhizophagus intraradices with seven repetitions. Evaluations of growth analysis, gas exchange and biomass in plants were made. The Physic nut plants inoculated with the species C. etunicatum and R. intraradices had a significant increase in the diameter of stem height, leaf number and leaf area, had a smaller reduction in conductance stomatal (gs) transpiration (E) and photosynthesis (A). In this wayarbuscular mycorrhizal fungi C. etunicatum and R. intraradices alleviated the harmful effect of water stress on physic nut plants, contributing to the increase in biomass production.