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Annals of Botany 75: 337-342, 1995
© 1995 Annals of Botany Company

Effects of Diazocyclopentadiene (DACP) and Silver Thiosulphate (STS) on Ethylene Regulated Abscission of Sweet Pea Flowers (Lathyrus odoratus L.)

R. Sexton, A. E. Porter, S. Littlejohns and S. C. Thain

Department of Biological and Molecular Sciences, University of Stirling, Stirling, UK

The ethylene production rate of cut sweet pea flower buds increased 37-fold during the first 48 h of their vase life. This increase in ethylene production was accompanied by petal wilting at 72 h and abscission of the buds 24 h later. Exposure of the cut spikes to the ethylene action inhibitor diazocyclopentadiene (DACP, 170 µI 1-1) for 18 h under fluorescent lights delayed subsequent wilting and abscission and promoted bud opening. Silver thiosulphate (0·2 mM) was more effective than DACP, delaying wilting for longer and preventing abscission entirely.Copyright 1995, 1999 Academic Press

Ethylene, abscission, silver thiosulphate, diazocyclopentadiene, flower senescence, wilting, sweet pea, Lathyrus odoratus L


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