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EFFECTS OF CHEMICAL PROTECTANTS AGAINST CHILLING INJURY OF YOUNG CUCUMBER SEEDLINGS.

Author(s) : SASSON N., BRAMLAGE W. J.

Type of article: Article

Summary

CHILLING OF 8-DAY-OLD CUCUMBER (CUCUMIS SATIVUS L.) SEEDLINGS FOR 48 HOURS AT 275 K (2 DEG C) CAUSED REVERSIBLE DAMAGE; CHILLED SEEDLINGS COLLAPSED BUT REGAINED TURGOR WITHIN 6 HOURS AT 298 K (25 DEG C). HYPOCOTYL SEGMENTS FROM CHILLED SEEDLINGS EXHIBITED INCREASED SOLUTE LEAKAGE, ETHYLENE PRODUCTION, AND O2 UPTAKE AFTER TRANSFER TO 298 K. PRETREATMENTOF SEEDLINGS GENERALLY REDUCED SYMPTOMS OF DAMAGE BUT DID NOT PREVENT CHILLING INJURY. OXYGEN UPTAKE INCREASED DURING THE FIRST 6 HOURS AT 298 K BUT RETURNED TO THE LEVEL OF UNCHILLED SEEDLINGS WITHIN 24 HOURS. UNCHILLED TISSUE WAS INSENSITIVE TO SHAM, BUT O2 UPTAKE WAS INHIBITED BY SHAM DURING THE RESPIRATORY BURST FOLLOWING CHILLING. TISSUE WAS NO LONGE RSHAM-SENSITIVE AFTER 24 HOURS AT 298 K, BY WHICH TIME THE RESPIRATORY BURST HAD SUBSIDED.

Details

  • Original title: EFFECTS OF CHEMICAL PROTECTANTS AGAINST CHILLING INJURY OF YOUNG CUCUMBER SEEDLINGS.
  • Record ID : 1982-0835
  • Languages: English
  • Source: J. am. Soc. hortic. Sci. - vol. 106 - n. 3
  • Publication date: 1981
  • Document available for consultation in the library of the IIR headquarters only.

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