Advances in understanding Norway spruce natural resistance to needle bladder rust infection: transcriptional and secondary metabolites profiling

Wien

2022

32-33

Artikel aus einem Buch

200209824

Combined transcriptional and metabolic profiling of the Norway spruce defence response to infection by C.
rhododendri in adult trees under subalpine conditions confirmed the results previously gained on artificially
infected young clones in the greenhouse, both regarding timing and development of infection, and
providing new insights into genes and metabolic pathways involved. The comparison of genotypes with
different degrees of susceptibility proofed that several of the identified key genes are differently regulated in
PRA-R, and that the resistant genotype combines constitutive defence in unaffected, healthy needles with a
strong induced response following fungal invasion. Genetic and metabolic differences between the resistant
and susceptible genotypes indicated a more effective hypersensitive response (HR) in needles of PRA-R that
prevents penetration and spread of the rust fungus and leads to a lower proportion of symptomatic needles
as well as reduced symptom development on the few affected needles.