Monitoring of compositional changes during berry ripening in grape seed extracts of cv. Sangiovese (Vitis vinifera L.).

Background: Seed oil and flours have been attracting the interest of researchers and industry, since they contain various bioactive components. We monitored the effects of ripening on lipids, monomeric flavan-3-ols, proanthocyanidins and tocols concentration in seed extracts from organically cultivated cv. Sangiovese vines.

Jasmonate-induced ripening delay is associated with up-regulation of polyamine levels in peach fruit.

Methyl jasmonate (MJ, 0.20mM) and its synthetic analog n-propyl dihydrojasmonate (PDJ, 0.22mM) were applied to peach fruit (Prunus persica L.

Jasmonate-induced transcriptional changes suggest a negative interference with the ripening syndrome in peach fruit.

Peach (Prunus persica L. Batsch) was chosen as a model to shed light on the physiological role of jasmonates (JAs) during fruit ripening. To this aim, the effects of methyl jasmonate (MJ, 0.

Transcription of ethylene perception and biosynthesis genes is altered by putrescine, spermidine and aminoethoxyvinylglycine (AVG) during ripening in peach fruit (Prunus persica).

The time course of ethylene biosynthesis and perception was investigated in ripening peach fruit (Prunus persica) following treatments with the polyamines putrescine (Pu) and spermidine (Sd), and with aminoethoxyvinylglycine (AVG). Fruit treatments were performed in planta. Ethylene production was measured by gas chromatography, and polyamine content by high-performance liquid chromatography; expression analyses were performed by Northern blot or real-time polymerase chain reaction.

Peach (Prunus persica L.) fruit growth and ripening: transcript levels and activity of polyamine biosynthetic enzymes in the mesocarp.

Transcript levels and activities of the polyamine biosynthetic enzymes arginine decarboxylase (ADC, EC 4.1.1.