Polygalacturonase and pectimmethylesterase activities during growth of Helianthus annus 1805 cell suspension

Abstract Time courses of growth of Helianthus annuus 1805 , changes of the amount of cell walls, as well as changes in polygalacturonase and pectinmethylesterase and related changes in the degree of esterification and polyuronic content of the cell walls were investigated. Dependences between the cell enzyme activities and the cell wall changes, as well as between the cellular and extracellular enzyme activities, were established. Growth of the cell suspensions and the related remodelling of the cell walls were considered a process in which the enzymes under study were active both in the cell and in the culture medium.