Hypersensitive browning and phytoalexin accumulation were induced in potato tuber (Solanum tuberosum L.) by the elicitor arachidonic acid. Phenylthiourea, an inhibitor of polyphenoloxidases, completely inhibited browning of the tissue induced by the elicitor in old (8 months) but not in young (1-2 months) tubers. Phytoalexin accumulation was not affected by the action of phenylthiourea both in young and old tubers, showing that this aspect of hypersensitive response is not necessarily related to the browning of the tissue. Hydroxyl radical (HO.) induced browning of the tissue but no phytoalexin accumulation. Gas chromatographic-mass spectrometric analyses showed that the rate of metabolization of arachidonic acid was independent of the addition of phenylthiourea and of the age of tubers.

INTERRELATIONSHIPS BETWEEN BROWNING AND PHYTOALEXIN ACCUMULATION ELICITED BY ARACHIDONIC-ACID / Raffaello, Castoria; Altamura, Maria Maddalena; Fabbri, Anna Adele; Marisa, Tomassi; Fanelli, Corrado. - In: JOURNAL OF PLANT PHYSIOLOGY. - ISSN 0176-1617. - 145:3(1995), pp. 209-214. [10.1016/s0176-1617(11)81879-1]

INTERRELATIONSHIPS BETWEEN BROWNING AND PHYTOALEXIN ACCUMULATION ELICITED BY ARACHIDONIC-ACID

ALTAMURA, Maria Maddalena;FABBRI, Anna Adele;FANELLI, Corrado
1995

Abstract

Hypersensitive browning and phytoalexin accumulation were induced in potato tuber (Solanum tuberosum L.) by the elicitor arachidonic acid. Phenylthiourea, an inhibitor of polyphenoloxidases, completely inhibited browning of the tissue induced by the elicitor in old (8 months) but not in young (1-2 months) tubers. Phytoalexin accumulation was not affected by the action of phenylthiourea both in young and old tubers, showing that this aspect of hypersensitive response is not necessarily related to the browning of the tissue. Hydroxyl radical (HO.) induced browning of the tissue but no phytoalexin accumulation. Gas chromatographic-mass spectrometric analyses showed that the rate of metabolization of arachidonic acid was independent of the addition of phenylthiourea and of the age of tubers.
1995
phytoalexins; browning; arachidonic acid; solanum tuberosum
01 Pubblicazione su rivista::01a Articolo in rivista
INTERRELATIONSHIPS BETWEEN BROWNING AND PHYTOALEXIN ACCUMULATION ELICITED BY ARACHIDONIC-ACID / Raffaello, Castoria; Altamura, Maria Maddalena; Fabbri, Anna Adele; Marisa, Tomassi; Fanelli, Corrado. - In: JOURNAL OF PLANT PHYSIOLOGY. - ISSN 0176-1617. - 145:3(1995), pp. 209-214. [10.1016/s0176-1617(11)81879-1]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/28541
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