The effect of oat crown rust (Puccinia coronata Cda. var. avenae Fraser et Led.) on 32P distribution and movement in susceptible and resistant oat cultivars

Hanker, I.; Taimr, L.; Kudelova, A.; Sebesta, J.

Vedecke Prace Vyzkumneho Ustavu Rostlinne Vyroby v Praze Ruzyni 21: 197-212

1981


Accession: 001136474

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Abstract
The movements of 32P-labelled P nutrients were traced in seedlings of the susceptible variety Tiger and the hypersensitive Garland, after the inoculation of all above-ground parts of the plants with race 240 of the pathogen. On both the seventh day after inoculation (first sampling) and the twelfth (second sampling), the P content of the third leaf was higher than that of the first in uninoculated plants of both varieties and in inoculated plants of Garland, but higher in the first leaf of infected Tiger plants and significantly higher, in those plants alone, at the second sampling than at the first. In infected seedlings of Tiger, P tended to accumulate at the sites of infection, and newly formed uredospores were also radioactive.