Resistance factors in potato tuber tissue to hyphal growth of Phytophthora infestans

1977 ◽  
Vol 11 (3) ◽  
pp. 267-277 ◽  
Author(s):  
D.D. Clarke ◽  
M.Y.A. Kassim
Keyword(s):  
Potato Tuber ◽  
Phytophthora Infestans ◽  
Hyphal Growth ◽  
Tuber Tissue ◽  
Resistance Factors ◽  
Potato Tuber Tissue

scholarly journals Wound Healing of the Potato Tuber in Relation to Infection by Phytophthora Infestans (Mont.) De Bary

1957 ◽  
Vol 10 (2) ◽  
pp. 189 ◽  
Author(s):  
KO Müller
Keyword(s):  
Wound Healing ◽  
Potato Tuber ◽  
Phytophthora Infestans ◽  
Protective Action ◽  
Tuber Tissue ◽  
Potato Tuber Tissue

The protective action of healing potato tuber tissue against Phytophthora infestans (Mont.) De Bary is made manifest in two ways:

scholarly journals Oospore Formation by Phytophthora infestans in Potato Tubers

2001 ◽  
Vol 91 (6) ◽  
pp. 579-585 ◽  
Author(s):  
Aaron Levin ◽  
Alexander Baider ◽  
Evgenia Rubin ◽  
Ulrich Gisi ◽  
Yigal Cohen
Keyword(s):  
Potato Tuber ◽  
Phytophthora Infestans ◽  
Field Experiments ◽  
Casein Hydrolysate ◽  
Leaf Tissue ◽  
Potato Tubers ◽  
Tuber Tissue ◽  
Potato Tuber Tissue ◽  
Oospore Formation ◽  
Petri Dishes

The ability of Phytophthora infestans, the causal agent of potato and tomato late blight, to produce oospores in potato tuber tissue was studied in the field and under laboratory conditions. In 1998 and 2000 field experiments, the canopy of potato cvs. Alpha and Mondial, respectively, were coinoculated with A1 + A2 sporangia of the fungus, and the infected tubers collected at harvest were examined for the presence of oospores. In 1998, only 2 of 90 infected tubers had oospores, whereas none of the 90 tubers examined in 2000 had any oospores. In the latter experiment, infected tubers kept in storage up to 12 weeks after harvest had no oospores. Artificial co-inoculations of whole tubers with A1 + A2 sporangia resulted only rarely in the formation of oospores inside the tubers. Co-inoculations of potato tuber discs taken from dormant tubers 0 to 16 weeks after harvest failed to support any oospore production, whereas discs taken from sprouting tubers of ≥18 weeks after harvest allowed oospores to form. Tuber discs showed enhanced oospore formation when treated before inoculation with either sugars, amino acids, casein hydrolysate, β-sitosterol, or chloroethylphosphonic acid. In contrast, reducing airflow into the petri dishes where potato tuber discs were incubated reduced the number of oospores produced. The number of oospores produced in tuber tissue was lower compared with that in leaf tissue regardless of the origin of isolates used. The data show that the ability of Phytophthora infestans to produce oospores in potato tuber tissue is very limited and increases with tuber aging.

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