Necrosis of potato tuber cells is enhanced, after 24 h incubation, by arachidonic acid (AA), an elicitor of the hypersensitive response in Solanum tuberosum L. and also by Fenton's reagents (a hydroxyl radical-generating system) either alone or in association with AA. The phenomenon is independent of tuber age. In aged tubers, phenylthiourea (PTU) causes a significant reduction of AA-induced cell necrosis. Necrosis observed in the presence of PTU alone is lower than in other treatments, and neither different from the controls nor affected by tuber age. Cell size is not affected by treatments or ageing. Nuclear hypertrophy occurs independently of tuber age, with the highest values after treatment with AA and Fenton's reagents. Nucleolar extrusion is observed in all treatments but earliest in the presence of AA. AA also enhances the number of lignified parenchymal cells and, to a lesser extent, the number of tracheary elements.

Cytological events induced by arachidonic acid in potato tubers / Altamura, Maria Maddalena; R., Castoria; Fabbri, Anna Adele; M., Tomassi; Fanelli, Corrado. - In: NEW PHYTOLOGIST. - ISSN 0028-646X. - STAMPA. - 128:1(1994), pp. 57-62. [10.1111/j.1469-8137.1994.tb03986.x]

Cytological events induced by arachidonic acid in potato tubers

ALTAMURA, Maria Maddalena;FABBRI, Anna Adele;FANELLI, Corrado
1994

Abstract

Necrosis of potato tuber cells is enhanced, after 24 h incubation, by arachidonic acid (AA), an elicitor of the hypersensitive response in Solanum tuberosum L. and also by Fenton's reagents (a hydroxyl radical-generating system) either alone or in association with AA. The phenomenon is independent of tuber age. In aged tubers, phenylthiourea (PTU) causes a significant reduction of AA-induced cell necrosis. Necrosis observed in the presence of PTU alone is lower than in other treatments, and neither different from the controls nor affected by tuber age. Cell size is not affected by treatments or ageing. Nuclear hypertrophy occurs independently of tuber age, with the highest values after treatment with AA and Fenton's reagents. Nucleolar extrusion is observed in all treatments but earliest in the presence of AA. AA also enhances the number of lignified parenchymal cells and, to a lesser extent, the number of tracheary elements.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/467889
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