Abstract
Seedlings of Zoysia japonica Steud were grown in soil. Primary tillerings arised from the nodes at the base of the second and third leaf-sheath at 5 and 6-leaf stage, respectively and the second tillerings arised from the nodes at the base of the first leaf-sheath of the primary tillerings. Main shoots elongated and developed into stolons at 8-10 leaf-stage of the shoots after the development of 4-7 tillerings. Growth pattern of the seedlings grown in a gravel culture was the same as the pattern of the seedlings grown in soil.
The seedlings at 3-leaf stage were grown in gravel culture containing nutrients and 0.001-01 ppm plant growth ragulators for 7 weeks in a greenhouse. AVG, inhibitor of ehylen-biosynthesis, promoted the increase of the number of tillerings and rhizomes, and it also promoted the elongation of rhizomes. Ethephon, ethylen-releasing compound promoted the elongation of rhizomes. Paclobutrazole, inhibitor of gibberellin-biosynthesis, promoted the increase of the number of tillerings and rhizomes, while it greatly suppressed their elongation. GA3 promoted the elongation of shoots, but inhibited the development of tillerings and rhizomes.
