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Enhanced suberin production in novel potato somaclones provides protective bio-barrier against two key scab diseases

conference contribution
posted on 2023-05-24, 11:13 authored by Thangavel, T, Robert TeggRobert Tegg, Calum WilsonCalum Wilson
Enhanced resistance to common scab of potato was obtained by somatic cell selection. An added bonus identified concurrent enhanced resistance to powdery scab, however the mechanism of resistance was not known. This study sought to compare parental cv. Russet Burbank to three disease resistant somaclonal variants. Glasshouse and field experiments tested the performance of these clones in the presence of two soil-borne pathogens, Streptomyces scabiei and Spongospora subterranea f.sp.subterranea. Histological (Fluorescent microscopy) and molecular methods (qRT-PCR) were used to identify the thickness of phellem (periderm) layer, degree of phellem and lenticel suberisation and relative expression of three suberin synthetic genes (CYP833A, StKCS6 and POP_A) from pathogen treated tubers. The variants showed a greater degree of phellem suberisation, and up to 7-fold increased expression of the suberin gene StKCS6 compared to the parent. We hypothesize that this suberisation provides an enhanced physical structure and important barrier for pathogen invasion into tubers and is important for enhanced resistance to common and powdery scab.


Publication title

7th Australasian Soilborne Diseases Symposium 2012


Tasmanian Institute of Agriculture (TIA)



Place of publication

Fremantle, Australia

Event title

7th Australasian Soilborne Diseases Symposium 2012

Event Venue

Fremantle, Australia

Date of Event (Start Date)


Date of Event (End Date)


Repository Status

  • Restricted

Socio-economic Objectives

Field grown vegetable crops

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    University Of Tasmania