Seasonality in the primary growth of Cupressus sempervirens L. from Western Crete
1999
Stankova, T. | Stankov, H. | Panetsos, K.
The primary growth increment of forty eight seedlings from nine natural provenances of Cupressus sempervirens L. from Western Crete was measured from January 1994 to August 1995 at 10-day-intervals. On the basis of the collected data, parameters characterizing the seasonal pattern of the epical shoot growth were defined and analyzed. The study showed that the species provenances from Western Crete exhibited height elongation all year around except during the dry summer. In addition, short growth cessation occurred for some of the trees during the winter. All provenances were consistent in their growth pattern during the two observed spring seasons. The duration of the spring growth period and the date of growth cessation in summer varied significantly among the provenances and the genotypes within them. The results indicate strong genetic control of these parameters and the presence of differential adaptation to the summer drought. On the other hand, the variation in thespring and the autumn growth resumption dates and the durations of the summer and winter rest periods were small and not significantly different among the provenances due to the high variation they contained. The northern provenances and those located on the northern aspects had shorter cessation in summer, while the provenances from the lower altitudes had a shorter winter rest period. The altitude of the provenance seems to affect the date of the peak in the spring growth. The lower appeared to haveit earlier than the higher provenances.
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