Impact of Thermal History on Tolerance of Meloidogyne hapla Second-stage Juveniles to External Freezing

Low temperature induced physiological changes that increased the ability of second-stage juveniles of Meloidogyne hapla to survive external freezing. Second-stage juveniles in polyethylene glycol solution were exposed to -4 , 0, 4, or 24 C, and then their survival was determined after ice-induced fr...

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Veröffentlicht in:Journal of nematology. - 1969. - 24(1992), 2 vom: 15. Juni, Seite 262-8
1. Verfasser: Forge, T A (VerfasserIn)
Weitere Verfasser: Macguidwin, A E
Format: Aufsatz
Sprache:English
Veröffentlicht: 1992
Zugriff auf das übergeordnete Werk:Journal of nematology
Schlagworte:Journal Article Meloidogyne hapla acclimation cold hardening cryobiology freezing tolerance invertebrate nematode overwintering thermal history
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245 1 0 |a Impact of Thermal History on Tolerance of Meloidogyne hapla Second-stage Juveniles to External Freezing 
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520 |a Low temperature induced physiological changes that increased the ability of second-stage juveniles of Meloidogyne hapla to survive external freezing. Second-stage juveniles in polyethylene glycol solution were exposed to -4 , 0, 4, or 24 C, and then their survival was determined after ice-induced freezing of the suspensions at - 4 C for 24 hours. Survival was greatest for juveniles exposed to 4 C before freezing. Some juveniles were killed by exposure to - 4 C before freezing of the suspensions. The percentage of juveniles surviving freezing increased from about 30% to 80% within 12 hours of exposure to 4 C. This tolerance of external freezing was lost during subsequent exposure to 24 C. Longer exposures, of 1 to 15 days, to low temperature did not increase the percentage surviving external freezing, as compared to the 12-hour exposure, but reduced the tolerance of external freezing lost during subsequent exposure to 24 C for 48 hours 
650 4 |a Journal Article 
650 4 |a Meloidogyne hapla 
650 4 |a acclimation 
650 4 |a cold hardening 
650 4 |a cryobiology 
650 4 |a freezing tolerance 
650 4 |a invertebrate 
650 4 |a nematode 
650 4 |a overwintering 
650 4 |a thermal history 
700 1 |a Macguidwin, A E  |e verfasserin  |4 aut 
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