Caragana microphylla Lam. Is becoming an important forage plant used for wind-break, sand-fixing, revegetation trials and soil amelioration in arid and semi-arid areas of northern China. Previous research found that the species was both rich in flavonoids and a potential resource for falvonoid extraction. Total flavonoid contents in different parts of C. Microphylla were measured using the aluminum nitrate spectrophotometric method. Results showed that total flavonoid contents of one-year-old branch and root samples in April reached a peak (1. 021% and 0. 249%); while half-year-old branches and two-year-old branches in September peaked (0. 990% and 0. 868%). Total flavonoid contents in half, one-year-old branches and leaf of two-year-old branches peaked at 2. 669%, 2. 517% and 2. 223% in September, July and June, respectively. Total flavonoid contents in flowers of half- and one-year-old branches reached their peaks in May (3. 324% and 3. 368%). Total flavonoid content in flowers of half- and one-year-old branch peaked in April (3. 345%). Total flavonoid contents in seeds of half-, one-, and two-year-old branches peaked in July (0. 837% , 0. 840% and 0. 812% , respectively). Total flavonoid content of plant tissue was ranked as: flower> compound leaf>cortex of branch>branch without leaves>seed>xylem of branch> cortex of root>xylem of root.
NETL
NSTL
维普
万方数据
