Abstract

RAMIREZ-GONZALEZ, G.; RODRIGUEZ-DE LA O, J.L.; MARTINEZ-SOLIS, J.  and  COLINAS-LEON, M.T.. Germination and growth ex vitro and in vitro of five species of cacti of the genus mammillaria. Polibotánica [online]. 2019, n.48, pp.99-110.  Epub June 15, 2020. ISSN 1405-2768.  https://doi.org/10.18387/polibotanica.48.8.

The germination and growth rate (RGR) of M. albilanata, M. bocasana, M. columbiana, M. rhodantha and M. spinosissima were compared under ex vitro and in vitro conditions. In the first case, the germination percentages (PG), germination speed (VG) and medium germination (G50) were evaluated. In the second, the RGR was determined after 40 weeks of culture. The in vitro treatment consisted of 25% Murashigue-Skoog (MS) medium for germination, and 50% MS with sucrose dose (3, 6 and 9%) for growth, while the ex vitro treatment was from a mixture of leaf soil and tezontle (1: 1). The analysis of variance and the Tukey tests showed significant differences between the responses generated in the level of treatments and species (p < 0.05), obtaining better results in the in vitro treatment. On the other hand, sucrose supplementation at 6% and 9% generated a higher growth rate in the aerial part, while in the 3% there was a higher growth rate in roots, in both cases superior to the ex vitro treatment. The survival rate of plants obtained in both conditions was 100%.

Keywords : Mammillaria albilanata; Mamillaria bocasana; Mamillaria columbiana; Mamillaria rhodantha; Mamillaria spinosissima.

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