L-Dopa production and antioxidant activity in Hybanthus enneaspermus (L.) F. Muell regeneration.
Hybanthus enneaspermus is an ethanobotanical plant extensively used in Indian traditional medicine. Quick and efficient in vitro mass propagation of this plant species was established for commercial utilization from leaf and node explants using various concentrations and combinations of plant growth regulators and polyamines. The maximum number of multiple shoots per leaf explant (40 shoots) was achieved on MS medium supplemented with 20 mg/l spermidine in combination with 4 mg/l BA+1.5 mg/l IAA after 8 weeks of culture. The elongated shoots were rooted (16 roots/shoot) on MS medium with the best concentration of IBA (1.5 mg/l) and in combination with 20 mg/l putrescine after 5 weeks of culture. The plants were successfully acclimatized (98 %) in the sand: soil: vermiculite mixture (1:1:1 v/v/v) in the greenhouse. An increased antioxidant activity was recorded in vitro regenerated shoots when compared to in vitro-induced roots. L-Dopa content was recorded higher in leaves (8.31 mg/g DW) followed by stem (6.22 mg/g DW) and root (3.22 mg/g DW) of leaf-derived plants than the field-grown parent plant after 5 weeks. By adopting this protocol, the regenerated-plants could be used for drug production and pharmacology work with as an alternative to field-grown plants.
Department of Biotechnology and Genetic Engineering, School of Biotechnology, Bharathidasan University, Tiruchirappalli, 620 024 Tamil Nadu India ; Molecular Genetics and Genomics Laboratory, Department of Horticulture, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 305 764 South Korea.
Ganeshan
G
Sivanandhan
Department of Biotechnology and Genetic Engineering, School of Biotechnology, Bharathidasan University, Tiruchirappalli, 620 024 Tamil Nadu India.
Venkatachalam
V
Vasudevan
Department of Botany, Periyar E. V. R College (Autonomous), Tiruchirappalli, 620 023 Tamil Nadu India.
Natesan
N
Selvaraj
Molecular Genetics and Genomics Laboratory, Department of Horticulture, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 305 764 South Korea.
Yong Pyo
YP
Lim
Department of Biotechnology and Genetic Engineering, School of Biotechnology, Bharathidasan University, Tiruchirappalli, 620 024 Tamil Nadu India.
Andy
A
Ganapathi
Antioxidant; HPLC; Hybanthus enneaspermus; L-Dopa; Polyamines; Violaceae