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DEGRADATION OF DATE PALM (PHOENIX DACTYLIFERA L.) CELL WALLS BY EXTRACLLULAR PECTOLYTIC ENZYMES PRODUCED BY VERTICILLIUM ALBO-ATRUM AND VERTILLIUM DAHLIAE

Ali H. Bahkali, Int J. Tropical Plant Disases 5 (1987): 165-172.

Ali H. Bahkali. 1987 Degradation of date palm (phoenix dactylifera L.) cell walls by extracellular pectolytic enzymes produced by Verticillium albo-atrum and Verticillium dahliae. J. Tropical plant Diseases Vol 5, No 2

Verticillium albo-atrum produced endo –PG (endopolygalacturonase), exo-PG (exopolygalacturonase) and PTE (pectin transeliminase) from two to twelve days. The enzymes were produced sequentially and endo-PG was the first formed enzyme in this sequence . V. dahliae too elaborated both hydrolytic and trans-eliminative enzymes and showed a distinct temporal sequence of synthesis. The constitutive production of pectolytic enzymes was noted for both organisms V. alboatrum generally exhibited higher pectic enzyme activity than V. dahhlae.