alexa Effect of 2,4-d, hydric stress and light on indica rice (Oryza sativa) somatic embryogenesis.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Meneses A, Flores D, Muoz M, Arrieta G, Espinoza AM

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Abstract With the purpose of increasing the embryogenesis regeneration process in vitroplants obtained from somatic embryos of the indica rice variety CR-5272 (Oryza sativa L.), two independent experiments were performed. The first experiment consisted in the effect of combination of three concentrations of the gelling agent Phytagel (1.8. 2.4. and 3 gL(-1)) and four 2,4-D concentrations (2.26, 4.52. 6.78, and 9.05 microM) on the induction and subsequent regeneration of embryogenic calli. On the second experiment, the pre-regeneration phase was modified: calli were subjected to darkness or diffuse light conditions for one, two, and three weeks. In embryogenesis induction, 35\% calligenesis was obtained using the MS culture medium supplemented with 6.78 microM of 2.4-D and 2.4 gL(-1) Phytagel, whereas on the control treatment (MS medium supplemented with 9.05 microM of 2.4-D and 3 gL(-1) Phytagel ) 24\% calligenesis was obtained. In addition, regeneration percentages were improved (22\% and 16\% for calli induced with the above treatments, respectively). Furthermore, in light exposure experiments, the best result was obtained by exposing the embryogenic calli to darkness for one week in pre-regeneration, followed by direct light exposure during the regeneration phase.
This article was published in Rev Biol Trop and referenced in Journal of Addiction Research & Therapy

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