Succession of endophytic bacterial community and its contribution to cinnamon oil production during cinnamon shade-drying process

•Shade-drying of cinnamon leaves makes great contribution to cinnamon oil production.•Shade-drying process changed the composition of endophytic bacterial community in cinnamon leaves.•The production of cinnamon oil and the evolution of endophytic bacterial community were positive correlated.•Saccharopolyspora has application potential on the improvement of cinnamon oil content.