Effects of growing methods and plant age on the yield, and on the content of flavonoids and phenolic acids in Echinacea purpurea (L.) Moench.
2006
Seemannova, Z.,Slovenska Technicka Univ., Bratislava (Slovak Republic). Fakulta Chemickej a Potravinarskej Technologie | Mistrikova, I.,Univerzita Komenskeho, Bratislava (Slovak Republic). Katedra Farmakognozie a Botaniky | Vaverkova, S.,Univerzita Komenskeho, Bratislava (Slovak Republic). Katedra Farmakognozie a Botaniky
The effects of plant age and three different growing methods (seeds sown directly into the soil, plants grown from seedlings, plants grown from root cuttings) on the yield and chemical composition of purple coneflower (Echinacea purpurea) are described. The weight of fresh (FW) and dry mass (DW) of rhizomes increased significantly with the age of the plants. Independently of the age, the highest yield of rhizomes (1,779 g/square m FW and 589 g/square m DW in the third year) was found in the plants grown from root cuttings and the smallest one (385 g/square m FW and 108 g/square m DW in the third year) from seeds sown directly into the soil. A similar dependence was obtained in the yield of flower heads. No relation was noticed between the growing method and the flavonoids and polyphenol acids concentrations neither in the flower heads nor in the rhizomes. The polyphenol acids concentration was slightly higher in the flower heads (2.85% in the third year) than in the rhizomes (2.22% in the third year). The results demonstrate that the experimental factors can stimulate increased yield of rhizomes and flower heads of E. purpurea.
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