(The role of chemical compounds accumulated in potato tubers infected by Fusarium solani the causal organism of tuber dry rot on the interaction between the host and the pathogen)
1993
Mostafa, H.M.
The present study aimed to investigate the possible role of compounds which accumulate in infected tissue during its invasion by a facultative (necrotrophic) parasite. Potato tuber dry rot caused by Fusarium solani was selected as a protein synthesis inhibitor to block synthesis of all compounds associated with infection. Since the compound is highly toxic to Fusarium, a Blasticidin-S resistant mutant was developed and used. The response of six potato tuber cultivars to infection by both wild and mutant isolates was tested. "Spunta" cultivar showed high degree of resistance to the infection where as "Karole" cultivare was highly susceptibile. Prevention fo the synthesis of compounds in the resistant cultivar led to the disappearance of hypersensitivity reaction and was accompanied with a light infection of slices. On the other hand, infection of "Karole" cultivar was altered in the presence of Blasticiden-S, especially when tissue viability was preserved (by incubation at 21 deg C). The fluorescent compounds and sesquiterpenoid stress compound (rishitin) were suppressed in tissues treated with Blasticidin-S
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