Peculiarities of growth and development of Jubaea Chilensis (Jubaea chilensis (Molina) Baill.) in the Nikitsky Botanical Gardens

Abstract

The introduction history of jubaea chilensis ( Jubaea chilensis (Molina) Baill., 1895) in the Nikitsky Botanical Gardens (NBG) has been described. Data of the phenological observations and quantitative characteristics of the leaves growth on average over the vegetation period have been reported. Rhythm of growth and development of this species by the year seasons have been determined. It has been revealed that jubaea chilensis “remembers” on a genetic level change of seasons in its homeland region and grows in the Southern Coast of the Crimea (SCC) by rhythms of the Southern hemisphere. The reasons and factors reducing its winter resistance and causing an irregular blossoming and a fruit bearing under the conditions of the Northern hemisphere have been determined. The thresholds values of freezing temperatures under introduction conditions (SCC) for jubaea chilensis have been determined. The agricultural engineering recommendations of this species cultivation under the conditions of the Southern Coast of the Crimea have been elaborated.