AJPS  Vol.5 No.24 , November 2014
Hormones Regulate in Vitro Organ Regeneration from Leaf-Derived Explants in Arabidopsis
Abstract: Plant in vitro organogenesis is well-controlled and thus provides an ideal system for plant propagation and studying mechanisms of plant development. However, the data on systematic in vitro organogenesis from leaf explant with various concentrations and combinations of hormones are limited. Arabidopsis is a very useful model plant species for many aspects of plant biological study. Here, we reported a simple, fast and efficient one-step process for evaluating leaf explant-derived in vitro Arabidopsis organogenesis involving the application of various concentrations and combinations of exogenous hormones. The central portion of the fourth rosette leaf was harvested from the 21-days-old seedling and cultured in vitro on the media containing 216 combinations of exogenous hormones. Different types of organs, including roots, shoots, inflorescences, and leaf-like organs were initiated from leaf explants. Several optimal experimental combinations were selected. A hormone combination, 1.00 μM NAA + 10.00 μM ZT, was considered as the most efficient one for adventitious shoot regeneration. And for adventitious root regeneration, six hormone combinations, [(NAA + ZT: 1.00 + 0.10 μM; 10.00 + 0.01 μM; 20.00 + 0.10 μM; 20.00 + 1.00 μM) and (NAA + 6-BA: 10.00 + 0.10 μM; 20.00 + 10.00 μM)], were thought to be the best ones. Further, both auxin and cytokinin ratios and concentrations were crucial for efficient in vitro organogenesis. Our study provides the important information for hormone-regulated organogenesis.
Cite this paper: Zhao, X. , Liang, G. , Li, X. and Zhang, X. (2014) Hormones Regulate in Vitro Organ Regeneration from Leaf-Derived Explants in Arabidopsis. American Journal of Plant Sciences, 5, 3535-3550. doi: 10.4236/ajps.2014.524370.

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