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Indian J Exp Biol ; 2015 Mar; 53(3): 177-183
Article in English | IMSEAR | ID: sea-158412

ABSTRACT

We studied the influence of sucrose and nitrogen concentration on in vitro flowering and fruit setting in elongated shoots of Withania somnifera. BA (1.5 mg/l) and IAA (0.3 mg/l) on MS medium supplemented with 4% sucrose showed 67% of in vitro flower induction frequency, 9 flowers/shoot, 4 fruits/shoot and 11 seeds/fruit in elongated-shoots. Different concentrations of nitrogen sources (L-glutamine, adenine sulphate, ammonium nitrate, potassium nitrate and sodium nitrate 5-25 mg/l) were tested in combination with 4% sucrose and BA at 1.5 mg/l and IAA at 0.3 mg/l. Highest number of flowers (20 flowers/shoot; 2.2-fold) and fruits (16 fruits/shoot; 3.39-fold), fruit setting (12 seeds/fruit; 1.08-fold) at a higher frequency (88 %) were achieved on MS medium augmented with 15 mg/l adenine sulphate with same PGRs and sucrose concentration. The maximum production of withanolide A (0.68 mg/g DW) and withanolide B (0.77 mg/g DW) was recorded in in vitro fruits. Highest accumulation of withaferin A (2 mg/g DW) was quantified from in vitro flowers, whereas, it was low in in vitro fruits (0.49 mg/g DW withaferin A). However, withanone (0.23 mg/g DW) was found accumulated uniformly in both in vitro flowers and fruits compared to control.


Subject(s)
Adenine/metabolism , Adenine/pharmacology , Carbon/metabolism , Culture Media/chemistry , Culture Media/pharmacology , Flowers/chemistry , Flowers/growth & development , Fruit/chemistry , Fruit/growth & development , Germination/drug effects , Glutamine/metabolism , Glutamine/pharmacology , Hydroponics , Nitrates/metabolism , Nitrates/pharmacology , Nitrogen/metabolism , Plant Shoots/chemistry , Plant Shoots/metabolism , Sucrose/metabolism , Sucrose/pharmacology , Withania/chemistry , Withania/growth & development , Withania/metabolism , Withanolides/metabolism
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