tailieunhanh - Improvement in androgenic response of borage (Borago officinalis L.) cultured anthers using antibrowning agents and picloram

Given the importance of borage (Borago officinalis L.) as a medicinal herb, androgenic studies are necessary in order to speed up the breeding programs of this plant species. In this work, we evaluated the effect of silver nitrate, activated charcoal, ascorbic acid, and polyvinylpyrrolidone (PVP), previously described as antibrowning agents and promoters of androgenesis. | Turkish Journal of Biology Turk J Biol (2017) 41: 354-363 © TÜBİTAK doi: Research Article Improvement in androgenic response of borage (Borago officinalis L.) cultured anthers using antibrowning agents and picloram 1, 1 1 2 Mohammad Reza ABDOLLAHI *, Zahra CHARDOLI ESHAGHI , Mohammad MAJDI Department of Agronomy and Plant Breeding, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran 2 Department of Agricultural Biotechnology, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran Received: Accepted/Published Online: Final Version: Abstract: Given the importance of borage (Borago officinalis L.) as a medicinal herb, androgenic studies are necessary in order to speed up the breeding programs of this plant species. In this work, we evaluated the effect of silver nitrate, activated charcoal, ascorbic acid, and polyvinylpyrrolidone (PVP), previously described as antibrowning agents and promoters of androgenesis. Adding silver nitrate at a concentration of 5 mg L–1 significantly enhanced the androgenic responses of cultured anthers up to ~2-fold for total calli production () and up to ~ for embryonic calli and embryo formation (30% and embryos/anther, respectively) compared to control culture medium. Culture media containing 5 and 10 mg L–1 silver nitrate and 2 mg L–1 PVP significantly reduced the callus browning and led to increased callus viability in borage cultured anthers. We also evaluated the effect of various combinations of picloram with 2-isopentyl adenine and 2,4-dichlorophenoxyacetic acid (2,4-D) as growth regulators in the standard protocol. Significantly better results were obtained by adding 2 mg L–1 picloram in combination with 2 mg L–1 2,4-D in culture medium. This medium produced the highest frequencies of callogenesis (), embryogenic calli (20%), and embryo formation ( embryos/anther) compared to control .