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Environmental and Stress Physiology

Changes in Fructose 2,6-Bisphosphate Levels in Green Pepper (Capsicum annuum L.) Fruit in Response to Temperature

U.S. Department of Agriculture, Agricultural Research Service, Orlando, Florida 32803, Horticultural Research Laboratory, Orlando, Florida 32803

The regulatory metabolite, fructose 2,6-bisphosphate (Fru 2,6-P₂) was found in green pepper (Capsicum annuum L.). The Fru 2,6-P₂ level was found to: (a) rise rapidly in response to heat; (b) drop rapidly, followed by recovery, in response to cold storage of fruit and, (c) oscillate during cold storage of fruit. The possible existence of a relationship between chilling injury and Fru 2,6-P₂ is considered.