The aim of characterizing these four populations was to
determine whether there were any variations (local adaptation) among the four
Corylus avellana L. (Hazelnut) populations. Variations considered included;
leaf phenology (sprouting and setting), growth, mineral nutrient acquisition
(N, P, K) and biochemical composition (glucose, fructose, sucrose, starch and
proline). These were evaluated after co-cultivation in a common-container area.
The cuttings were sourced from four distinct populations, rooted and cultivated
under similar conditions for four years. Phenologies were scored in spring
(March to April) and in autumn (October to November) for bud sprouting and bud
set respectively. The plants were sampled twice per year in spring (April) and
in autumn for nutrient and biochemical analyses. There were no significant
differences in phenology and growth among populations. The phenology was
related to the annual temperature and varied with the years. For most nutrient
and biochemical parameters, there were no significant differences among the
populations. Finally, the study highlighted the fact that both phenology timing
and growth rate were consistent from year to year. The results demonstrated
that despite the reported genetic differences and distance among the
populations in their natural habitats, there were no local differentiations
upon local co-cultivation. This demonstrated the great adaptive plasticity of
hazelnuts to different climatic conditions. These adaptive capacities acting
among the population could allow populations to cope with climate change and
transfer, as in assisted migration, within the range tested.
Author(s)details:-
James Gacheru Wanjiku
Department of Agricultural Sciences, School of Agriculture Earth and
Environmental Sciences, Taita Taveta University, P.O Box-635-080300, Voi,
Kenya.
Heike Bohne
Institute of Horticultural Production Systems, Section: Woody Plant and
Propagation Physiology, Leibniz University of Hannover, Hannover, Germany.
Please See the book
here :- https://doi.org/10.9734/bpi/racas/v9/438
No comments:
Post a Comment