biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 15:339-345, 1973 | DOI: 10.1007/BF02922447

Isoperoxidases in jerusalem artichoke in relation to tuberization and dormancy

Th. Gaspar1, Catherine Teppaz-Misson1, J. C. Courduroux1
1 Laboratoire de Phytomorphogenèse, Clermont-Ferrand, Clermont-Ferrand, France

Peroxidase activity and isoenzyme pattern were investigated in buds and tubers of Jerusalem artichokes in relation to induction and breaking of dormancy. Peroxidase activity per unit soluble protein is the highest in the dormant stage. Conditions leading to growth,i.e. release of dormancy by the cold, stimulation of axial growth by gibberellic acid or stimulation of radial growth (tuberization) by kinetin, cause rapid loss of total peroxidase activity together with a decrease of intensity of the most cathodic isoperoxidases. Induction of dormancy by AMO-1618 increases peroxidase activity mainly through the same cathodic isoenzymes. The role of the cathodic isoperoxidases is discussed in relation to auxin catabolism and the genesis of oxygenation products inhibitory to plant growth.

Received: November 16, 1972; Published: September 1, 1973  Show citation

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Gaspar, T., Teppaz-Misson, C., & Courduroux, J.C. (1973). Isoperoxidases in jerusalem artichoke in relation to tuberization and dormancy. Biologia plantarum, 15(5), 339-345. doi: 10.1007/BF02922447
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