Time : variable frequency of events in domains of Tilia cambium

Abstract

In the cambium of !inden, producing xylem with interlocked grain, domains active, as regards the occurrence of eveńts, and inactive ones can be distinguished. The area of the cambium investigated was an assemblage of small domains among which at certain periods domains Z, and, at another .period, domains S were active. The inclination of the grain was changin·g in the 'airection corresponding to the type of the active domains. Altemative occ4rrence of periods of activity of Z and S domains led to the formation of interlocked grain in the xylem, with a much longer wave than the height of a pair domains.