An effective conversion of PLBs into shoots was recorded
in D. huoshanense at 4 mg l1 of KIN [22] whereas in our
study, protocorms cultured on every concentration of KIN
produced multiple roots equally to IBA (Table 3). A maximum
number of 6.25 and 5.25 roots per explant were observed on
7 mg l1 and 3 mg l1 of KIN along with an average length
of 0.98 cm roots on KIN 5 mg l1. These results suggest that
KIN has some critical role on root development and no reports
so far on orchids but similar root growth on KIN alone was
reported in Dactylorhiza majalis [35] and in a fishtail fern [2].