Abstract
The conventional seed propagation of H. coronarium produced very few
seedlings. This species has tendency to be endangered if appropriate propagation is
not applied. Shoot buds of H. coronarium were cultured on MS semi-solid medium
for shoot proliferation. The effects of plant growth regulators (PGRs), 2, 4 and
8 ppm 6-benzylaminopurine (BA) and 0.5, 1 and 2 ppm thidiazuron (TDZ) were
investigated. The highest shoot proliferation of H. coronarium was 8.6±0.4 shoots per
explant when cultured on MS semi-solid medium supplemented with 1 ppm TDZ for
four weeks before subculturing to PGRs free MS medium for 12 weeks.