Elastic Modulus for a Single Crystal Specimen VS a Polycrystalline Specimen.

Hello, i have been wondering how the elastic modulus of a single crystal specimen will vary from a polycrystalline specimen. From what i understand, the elastic modulus of a material will be affected specifically by the atomic bonds and atomic packing. Since a single crystal specimen is a continuous lattice with no grain boundaries, does this mean that the force of attraction between the atoms increase? Will this cause a higher elastic modulus to be observed in a single crystal specimen than a polycrystalline. In a polycrystalline, grain boundaries are present and will this interfere with the force of attraction with the atoms and reduce the elastic modulus? Some clarification on this matter would be much appreciated.

Thank you.