Seasonal variations of ballota hirsuta benth flavonoids of tessala mount of the prefecture of Sidi Bel-Abbes (Western Algeria)

摘要

Secondary metabolites are organic molecules synthesized by plants when interacting with their environment. To demonstrate this effect, we have followed the seasonal variation of the amount of flavonoids inBallota hirsuta Benth which grows in Tessala Mountains.The results showed that the leavesaretherichest organs in flavonoids in the four seasons. The accumulation of flavonoids in the leaveswas recordedmuchmore in summer and in spring; however the low concentrations have been recorded in winter and autumn. The stalks and roots contain the lowest concentrations in flavonoids. This uneven variation of the flavonoids concentration among the three types of organs and between the different sampling seasons is closely linked to the environmental conditions and the phonological stages of the plant.