Content of phenol compounds and silicon in plants of Conyza canadensis (L.) Cronquist
2007
Vinogradova, Yu.K., Russian Academy of Sciences, Moscow (Russian Federation). The N.V. Tsitsin Central Botanical Garden | Kolesnikov, M.P.
The study on introduction population, included seed-origin plants from 25 localities within the secondary range of Conyza, showed that variability of phenol compound content and content of different silicon forms were extremely low both within populations and between populations. In terms of phenol compound content, Conyza (3%) is on a par with a number of widely distributed medicinal plants, and in terms of apygenin content in flavonoid complex, Conyza (1%) even compares favourably with them. The total content of silicon is 1.23% of dry matter. Inflorescences contain much more polyphenols, flavonoids and some organic acids than leaves and shoots. Condensed polyphenols predominated in shoots. Organic silicon predominates in inflorescences, whereas in shoots its content is one-second of its previous value, at the expense of increased content of polymeric and mineral silicon. Thus Conyza canadensis is considered to be a perspective medicinal plant species, but only leaves and inflorescences are suitable for medical purposes.
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