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Identification of a phenylalanine ammonia-lyase inactivating factor in harvested head lettuce (Lactuca sativa)

, : Identification of a phenylalanine ammonia-lyase inactivating factor in harvested head lettuce (Lactuca sativa). Physiologia Plantarum 97(2): 327-331

Exposure of harvested crisphead and Iceberg lettuce leaf tissue to hormonal levels of ethylene (10 micro l/litre) at 5 degrees C promoted the de novo synthesis of phenylalanine ammonia-lyase (PAL, EC and an increase in its activity. It also promoted the appearance of the postharvest physiological disorder called russet spotting (RS).

Accession: 002863219

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Related references

Daines, R.J.; Minocha, S.C.; Kudakasseril, G.J., 1983: Induction of phenylalanine ammonia-lyase (PAL) in germinating lettuce seeds (Lactuca sativa). Dry Grand Rapids seeds contained no detectable PAL activity, but PAL activity was detected in these seeds within 4 h of imbibition under white light. The specific activity of PAL increased rapidly during the next 12-16 h of imbibition. Far-red lig...

K.D.; Saltveit M.E.Jr, 1986: Effects of calcium and auxin on russet spotting and phenylalanine ammonia lyase activity in iceberg lettuce lactuca sativa. Application of 0.3-0.5 m Ca or 0.1-1.0 mM 2,4-D strongly inhibited russet spotting (RS) in iceberg lettuce (Lactuca sativa L.) leaf tissues and significantly reduced extractable phenylalanine ammonia-lyase (PAL) activity. Since neither Ca nor 2,4-...

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