The process of Rhizobium infection involves colonization of the root, invasion through root hairs via an infection thread, nodule formation in the cortex, release of bacteria into cells, differentiation into nitrogen-fixing cells, and establishment of a vascular connection with the host plant.
Rhizobium infection process: 1. Rhizobia multiply and colonize root surroundings. 2. They attach to epidermal/root hair cells. 3. Root hairs curl, and bacteria invade them. 4. Infection thread forms, carrying bacteria into the cortex. 5. Nodule formation is initiated in the cortex. 6. Bacteria are released into cells. 7. This leads to specialized nitrogen-fixing cells. 8. The nodule establishes a vascular connection with the host for nutrient exchange.
| Front | explain the process of rhizobium infection |
|---|---|
| Back | 1 rhizobium multiply and colonize the surroundings of the root 2 the rhizobia get attached to the epidermal and root hair cells 3 the root hairs curl and the bacteria invade the root hair 4 infection thread is produced carrying the bacteria into the cortex of the root 5 in the coetex of the root, they INITIATE NODULE FORMATION 6 bacteria are NOW Released from the thread INTO the cells 7 THIS leads to the DIFFERENTIATION of specialised nitrogen fixing cells 8 The nodule thus formed establishes a DIRECT VASCULAR CONNECTION with the host for exchange of nutrients |
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