References:

• Taiz, L. and Zeiger, E. (2002). Plant Physiology. Sinauer Associates. 5: 423-556.
• Cooper, G. M. (2009). The Cell: A Molecular Approach. 5 edition. Sinauer Associates. 15: 608-09
• Gaspar, T.; Kevers, C.; Penel, C.; Greppin, H.;. Reid, D. M., Thorpe, T. A. (1996). Plant Hormones and Plant Growth Regulators in Plant Tissue Culture. In Vitro Cell. Dev. Biol.--Plant3 2:272-289.