The phrase "constituent groups" refers to smaller groups or sections that are part of a larger whole or organization. These groups can have different interests or characteristics but together they make up the larger entity. Full definition
Coalition of Constituent Groups Condemn Senator Klein's Alleged Sexual Misconduct Bronx, NY — A coalition of grassroots groups joined forces Friday evening outside of Senator Klein's Morris Park office to denounce both his alleged sexual misconduct as well as his personal attacks -LSB-...] (thebronxchronicle.com)
Along with these laboratories, several constituent groups help provide scientific guidance and develop ARM priorities. (arm.gov)
To be sure, neutrality governs this result: the cathedral is not safe because it is a religious building; it is safe because it is a building valued by a politically powerful constituent group. (religion-online.org)