Abstract:
:The effect of various concentrations of aminoethoxyvinylglycine (AVG; 0.32 and 1.28 mM), an ethylene biosynthesis inhibitor, and of the polyamines putrescine (10 mM), spermidine (0.1, 1 and 5 mM) and spermine (2 mM) on peach (Prunus persica L. Batsch cv. Redhaven) fruit ripening was evaluated under field conditions. Treatments were performed 19 (polyamines) and 8 (AVG) days before harvest. Fruit growth (diameter, fresh and dry weight), flesh firmness, soluble solids content and ethylene emission were determined on treated and untreated (controls) fruits. Moreover, endogenous polyamine content and S-adenosylmethionine decarboxylase (SAMDC, EC 4.1.1.21) activity were determined to check for a possible competition between polyamines and ethylene for their common precursor S-adenosylmethionine (SAM). Both treatments strongly inhibited ethylene emission and delayed flesh softening. On a biochemical level, AVG and exogenous polyamines both reduced the free-to-conjugate ratio of endogenous polyamines, and transiently altered SAMDC activity. The possible use of these compounds to control fruit ripening is discussed also in the light of their rejuvenating effect on peach fruits.
journal_name
Physiol Plantjournal_title
Physiologia plantarumauthors
Bregoli AM,Scaramagli S,Costa G,Sabatini E,Ziosi V,Biondi S,Torrigiani Pdoi
10.1034/j.1399-3054.2002.1140317.xsubject
Has Abstractpub_date
2002-03-01 00:00:00pages
472-481issue
3eissn
0031-9317issn
1399-3054journal_volume
114pub_type
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