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Purification and partial characterisation of hatching factors for the potato cyst nematode Globodera rostochiensis from potato root leachate

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Hatching factors with activity towards Globodera rostochiensis were isolated from the root leachates produced by 1500 potato plants grown in gravel. In total, nine hatching factors, each with molecular weight 530.5 Da, were isolated. The main differences in the daughter ions produced from different hatching factors after fragmentation by mass spectrometry occurred between 245 and 500 Da. The main hatching factor, HF E, was found in extremely low concentrations in the leachate (less than 2.9 × 10­5% of recovered organic material) and was active in vitro at less than 2.1 × 10­8 M. Separation of the different hatching factors during purification was found to decrease the percentage hatch achieved in vitro at optimum concentration.

Aus Wurzelablaufwasser von 1500 in grobem Sand gehaltenen Kartoffelpflanzen wurden gegenüber Globodera rostochiensis wirksame Schlüpffaktoren isoliert. Insgesamt wurden neun Schlüpffaktoren isoliert, jeder mit einem Molekulargewicht von 530.5 Da. Die grössten Unterschiede bei den Tochterionen, die bei einer Zerlegung durch Massenspektrometrie erzielt wurden, traten zwischen 245 und 500 Da auf. Der Hauptschlüpffaktor, HF E, wurde in extrem niedrigen Konzentrationen (weniger als 2.9 × 10­5% des gewonnenen organischen Materials) im Ablaufwasser gefunden. Er war in vitro noch bei weniger als 2.1 × 10­8 M wirksam. Eine Trennung der verschiedenen Schlüpffaktoren im Laufe der Reinigung verminderte den prozentualen Schlupf in vitro bei optimaler Konzentration.


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