The cyclicity of dynamics of formation of internodes on the stems of Salix dasyclados (Salicaceae) against the background of short-term atmospheric drought

Afonin A.

We analyzed the seasonal dynamics of the rate of internode formation against the background of a sharp change of early summer drought by cool rainy weather. Seasonal trends in the rate of internode formation are reliably approximated by third-degree polynomials. Differences between seasonal trends may be due to inter-clone, intra-clone and inter-shoots variability. Seasonal dynamics of deviations in the rate of internode formation from nonlinear seasonal trends is cyclical. Cyclical nature of the seasonal dynamics of deviations is determined by endogenous rhythms of development that do not depend on agrometeorological conditions is substantiated.

Keywords:woolly-stemmed willow, Salix dasyclados, annual shoots, internodes, seasonal dynamics, short-term drought, atmospheric drought.