What plant, commonly known as grey mangrove or white mangrove, has had a bacterium species from the genus of "Streptomyces" isolated from its rhizosphere? 
Avicennia marina: Avicennia marina, commonly known as grey mangrove or white mangrove, is a species of mangrove tree classified in the plant family Acanthaceae (formerly in the Verbenaceae or Avicenniaceae).
i don't know