Resumo

CRUZ GARCIA, Hermila et al. Leaf senescence in micropropagated plants of Agave americana during acclimation. Rev. Mex. Cienc. Agríc [online]. 2017, vol.8, n.2, pp.381-391. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v8i2.58.

In the state of Oaxaca, Agave americana var. oaxacensis is one of the agavaceous species of wild collection that are used for the artisan elaboration of mezcal. There is little information on its propagation and cultivation, recently the propagation of agaves has been increased, through the technique of plant tissue culture, for conservation purposes. However, there is little information on morphological and functional changes by plants when they are transferred to ex vitro environment, among them is senescence or gradual loss of leaves formed in the in vitro environment, where there is manipulation of conditions to control certain physical and biological factors. This study aimed to evaluate the foliar behavior of micropropagated plant Agave americana var. oaxacensis in response to different substrates and fertilization doses during their acclimatization. The results showed that the substrate and fertilization dose influenced leaf senescence or loss. The conserving leaves formed in vitro for longer, he influenced the formation of new leaves in ex vitro conditions. Generally, the plants replaced all its leaves formed in vitro in a span of 240 days.

Palavras-chave : fertigation; growth; leaf blade; nutrients; substrates.