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  • nodules
  • Some of the carbohydrates manufactured by the plant during photosynthesis are transported to the nodules where they are used as a source of food by the Rhizobium. (webring.com)
  • Nodules are formed on a particular host only in response to compatible rhizobia producing Nod factors with the adequate chemical structure ( 1 ). (pnas.org)
  • infection
  • Simultaneously, the rhizobia enter the host plant via the root hairs through the formation of tubular structures called infection threads which traverse the root epidermis and cortex and then the nodule primordium. (pnas.org)
  • Rhizobia are released from infection threads in the cytoplasm of postmitotic nondividing cells by endocytosis. (pnas.org)