Triazolic fungicides are widely applied in crop production to protect
plants against fungal pathogens. However, they may influence the
biochemical processes in plants and other non-target species. This paper
is aimed at the effect of triazoles (namely tebuconazole, cyproconazole,
and penconazole) single/mixed applications on the phenolics production
in tomato (Solanum lycopersicum L.) fruit peel, amount of
chlorophyll a and b in tomato leaves as well as on basic
plant growth parameters. For this purpose, cherry tomatoes were planted
in the pot experiment and foliarly-treated weekly, with the same total
triazoles dose of 3.52 μmol per plant (in mixtures of 1.71 or 1.17 μmol
of each in two or three components, respectively). The treatments
increased the weight of fruits in the 1 harvest
about 43%, however, this effect was not observed in the next harvest.
Increased oxidative stress in the triazoles presence was observed, based
on the elevated production of antioxidant phenolics in the
1 harvest. Most alarming is the decrease of the
weight of thin stems and foliage and the concentration of
chlorophyll a (b) in leaves in all triazoles-treated
variants. The non-target impacts on plant biochemical processes (related
to the phenolics or chlorophylls production and functionality) were
confirmed.
Poplar breeding for the purpose of biomass production in short rotation periods in Germany: Problems and first findings