Use of abscisic acid, mannitol and salt concentration decrease in the culture medium in the in vitro conservation of Ipomoea batatas

Abstract

Nodal segment from in vitro plants of Jewel clone sweet potato were culture in the following culture medias: a) Murashige and Skoog (1962) salts supplemented with abscisic acid (0.0, 1.0, 5.0 y 10.0 mg.l-1), b) Murashige and Skoog (1962) salts supplemented with mannitol (0.0, 10.0 15.0 y 20.0 g.l-1) and c) different Murashige and Skoog (1962) salts concentration (100, 75, 50 and 25%) were used. Survival during conservation was high in all experiment. The 5.0 and 10.0 mg.l-1 abscisic acid strongly inhibited the plants growth. It was reached a decrease of growth when using mannitol in the culture medium. The media with 25% and 50% MS salts concentration caused a low of plants growth. When cultured in fresh culture medium it was achieved a high recovery ratio of conserved material. Key words: sweet potato, minimal growth, phyto resources, biodiversity