The four farmer members and the three industry members shall be appointed by the Governor and confirmed by the Senate; provided, that no two of the farmer members shall reside in the same congressional district of the state; provided further, that no two of the industry members shall reside in the same congressional district of the state. The members of said State Board of Agriculture and Industries appointed by the Governor shall hold office for and only during the tenure of office of the Governor making the appointment and until their successors are appointed and qualified.