13. Formation of nodules

Question 1

Structure of lecture

Answer 1

1. Evolution of nodulation
2. Formation of the infection thread
3. Diversity in infection thread formation
4. Signalling of nodule formation vs., infection

Question 2

What are the 4 stages of nodule growth?

2

Answer 2

1. Plant releases flavonoids, which are detected by Rhizobial NodD
2. Rhizobial release of LCOs (Lipo-Chito-Oligosaccharides)
3. LCOs induce Nod factors in the plant via Ca2+ spiking
4. Root curling