INFLUENCE OF LIGHT-EMITTING DIODES AND BENZYLAMINOPURIN ON ADVENTITIOUS SHOOT REGENERATION OF WATER HYSSOP (BACOPA MONNIERI (L.) PENNELL) IN VITRO

Mehmet Karataş, Muhammad Aasim, Muraz Dazkirli

Abstract


Water hyssop (Bacopa monnieri (L.) Pennell) is a medicinal plants. Its upper and lower halves of leaf explants were incubated in Murashige and Skoog (MS) medium supplemented with 0.25, 0.50 and 1.0 mg/L benzylaminopurine (BA) for 8 weeks; the explants were exposed to white (W) and red and blue (R and B, respectively) light-emitting diodes (LEDs), at 4:1, 3:1, 2:1 and 1:1 R and B light ratios, respectively. Shoot regeneration (100%) was achieved from all explants at all applied concentrations of BA and LED types. All explants showed different BA concentration requirements for regeneration of the maximum number of shoots. Longer shoots were obtained on medium with 0.25 mg/L BA. The W LED lighting system was found to be more effective for regenerating the maximum number of shoots (26.11) per explant (on the upper half of the leaf). Conversely, longer and shorter shoots were generated under 1:1 R:B and W LEDs, respectively. The number of shoots per explant ranged from 9.67-24.0 (full leaf), 6.33-25.92 (lower half of the leaf) and 7.33-27.33 (upper half of the leaf), respectively, in response to BA and LED light. Shoot length ranged from 0.94-1.90 cm (full lamina), 0.70-2.11 cm (lower half of the leaf) and 0.93-1.83 cm (upper half of the lamina) in response to BA and LED lifght. Regenerated shoots were successfully rooted using indole-3-butyric acid (IBA) and acclimatized in the aquarium provided with tap water.

 

Key words: adventitious; light-emitting diodes (LEDs); leaf explants; shoot regeneration; water hyssop

 

Received: August 3, 2015; Revised: November 13, 2015; Accepted: November 16, 2015; Published online: April 22, 2016


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