Tytuł pozycji:
Effect of salt stress on prenol lipids in the leaves of Tilia 'Euchlora'
Soil contamination caused by the NaCl used to de-ice slippery roads in winter is now recognized
as one of the major causes of nutrient disorders and death in urban trees. It is believed that polyisoprenoids
may have a specific role in the adaptation of plants to adverse conditions and habitats; it is further believed
that in the cell, they may exhibit a protective effect in response to biotic and abiotic stress. The aim of this
study was to evaluate the effect of salt stress on the content of prenol lipids in the leaves of Crimean linden
(Tilia ‘Euchlora’). The Cl content in the slightly damaged (“healthy”) leaves averaged 0.96%, while that
in the heavily damaged (“sick”) leaves averaged 2.02%. The leaves of control trees contained on average
0.57% Cl. The Na contents in the healthy and damaged leaves were 208 mg/kg and 1038 mg/kg, respectively,
and the Na content in the control areas was 63 mg/kg. A mixture of polyprenols consisting of four
compounds, prenol-9, prenol-10, prenol-11 and prenol-12, was identified in the leaves of Crimean linden.
This mixture was dominated by prenol-10 (2.16–6.90 mg/g). The polyprenol content was highest in the
leaves of “healthy” trees (approximately 13.31 mg/g), was lower in the case of “sick” trees (approximately
9.18 mg/g), and was the lowest in the control trees (mean 4.71 mg/g). No changes were observed in the
composition of the mixture of polyprenols under these conditions. The results suggest that polyprenols
may affect the accumulation of Cl in leaves. This phenomenon is evidenced by the high content of prenols
in the leaves of trees considered “healthy” but growing under conditions of increased soil salinity and the
lower content of prenols in the leaves of the “sick” and control trees. It is advisable to further investigate
the role of prenol lipids in the leaves of trees subjected to salt stress