Effects of lanthanum element on the rooting of loquat plantlet in vitro.

摘要

We investigated the rooting rate, the number of roots, and the state of growth of loquat (Eriobotrya japonica Lindi) plantlet in medium where La(NO3)3 (0.5-100.0 micromol/L) was added 20 d after transplanting. The activity of peroxidase, nitrate reductase, and the fresh weight of roots were determined 44 d after transplanting. The result showed that the optimum concentration of La(NO3)3 (1.0-3.0 micromol/L) in the rooted medium could increase the rate and the fresh weight of rooting, promote the length of root, and increase the activities of peroxidase and nitrate reductase.