Phytopathology (2014) 104, 126-133

C.M. Wallis, A. Rashed, A.K. Wallingford, L. Paetzold, F. Workneh and C.M. Rush (2014)
Similarities and differences in physiological responses to ´Candidatus Liberibacter solanacearum' infection among different potato cultivars
Phytopathology 104 (2), 126-133
Abstract: Zebra chip disease (ZC), putatively caused by the fastidious bacterium `Candidatus Liberibacter solanacearum', is a threat to potato growers worldwide. However, little is known about biochemical shifts in different potato genotypes in response to `Ca. L. solanacearum' infection. To address this, 'Red La Soda', 'Russet Norkotah', and 'FL 1867' potato were infected with `Ca. L. solanacearum' 4, 3, 2, and 1 weeks before harvest to observe variability in cultivar responses to `Ca. L. solanacearum' infection. ZC symptoms, `Ca. L. solanacearum' titers, and tuber biochemistry were assessed. Red La Soda tubers exhibited greater symptoms when infected for 4 weeks than Russet Norkotah or FL 1867 tubers. `Ca. L. solanacearum' titers did not vary among cultivars. Tuber levels of amino acids, carbohydrates, and phenolics varied among cultivars but no consistent trends were observed. Individual amino acids and phenolics were greater in FL 1867 than Red La Soda, whereas others were greater in Red La Soda or Russet Norkotah than FL 1867. Most amino acids, carbohydrates, and phenolics were positively associated with infection duration and symptoms regardless of cultivar. Associations between most of the evaluated compounds and `Ca. L. solanacearum' titer were positive in Red La Soda. However, no associations between `Ca. L. solanacearum' quantity and compounds were observed in FL 1867 and Russet Norkotah.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Christopher M. Wallis, Charles M. Rush, Arash Rashed

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Liberibacter solanacearum	Potato (Solanum tuberosum)