ISSN:
1871-4528
Keywords:
Erwinia carotovora subsp.atroseptica
;
effektive Dosis
;
Vitalfärbung
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Description / Table of Contents:
Summary The inoculum densities (effective dose) ofErwinia carotovora sub sp.atroseptica (Eca) needed to initiate infection of tuber tissue before and after a 24 h wound-healing period, was determined using a vital stain. The effects of various treatments on the efficiency of the defence reaction associated with wound healing, and on rot initiation were manifested as changes in the effective dose. The defence reaction was inhibited by temperatures 〈10°C, reduced O2 levels ≤5%, and CO2 proportions ≥20% (Fig. 3a and 4a). Moisture loss in stored tubers increased their defence reaction compared to that of freshly harvested ones (Table 1). The effect of these factors on Eca development was identical to that which occurs in potato production where tuber wounds are generally contaminated with Eca. Rot initiation was best prevented by removal of water (Table 1), storage at 15°C, avoidance of reduced O2 levels 〈10% and CO2 accumulation (Fig. 3b and 4b).
Notes:
Zusammenfassung Nach Inokulation mit abgestuften Bakteriendichten wurde über eine Vitalfärbung von Knollengewebe der Schwellenwert zur Fäuleauslösung bestimmt. Seine Erhöhung nach 24 h Wundheilung charakterisiert die Effizienz der biochemischen Fäuleabwehr. Die Abwehrreaktionen des Knollengewebes und der Prozess der Fäuleauslösung sind in unterschiedlichem Masse von der Temperatur, der Feuchtigkeit und dem O2- sowie dem CO2-Gehalt der Atmosphäre abhängig.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02360015
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