چکیده
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Common periwinkle (Catharanthus roseus L.) is an important medicinal plant used by the pharmaceutical industry.
The present work aimed to determine the effect of low light intensity on the primary and secondary metabolic processes,
using various photosynthesis and targeted and untargeted analytical techniques. Growth light had only limited effects
on the photosynthetic electron transport processes, although membrane stability seemed slightly higher in plants
growing under higher light conditions. The reduced growth light caused a reduction in certain primary metabolites,
including amino acids and sugars, and it also reduced the contents of most of the phenolic compounds investigated in
the present experiments. Interestingly, the differences in the growth light caused a much less pronounced difference
in the alkaloid contents than that found in the flavonoid contents. However, besides the growth light, genotypic
differences, most evident in flower colour, also affected some metabolic processes, including primary and secondary
processes.
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