Micropropagation of Pyracantha coccinea

in HortScience

Pyracantha coccinea is a thorny evergreen shrub native to southeast Europe to southeast Asia. It is a popular ornamental plant because of its showy bright red fruits and small white flowers. However, in vitro vegetative propagation of P. coccinea has not been studied. Nodal segments with one or two axillary buds (1 to 1.5 cm in length) were cut and disinfected in a solution of 0.1% (v/v) mercuric chloride (HgCl2) for 5 minutes, and proliferated on Murashige and Skoog (MS) basal medium supplemented with various concentrations 6-benzylaminopurine (6-BA). After 4 weeks, newly formed shoots were transferred to proliferation and rooting media containing various concentrations of indole-3-butyric acid (IBA). Establishment of axillary buds was significantly better with an establishing rate of 67% on basal MS medium augmented with 6.6 µm 6-BA. The best medium for proliferation of shoots was three-fourth basal MS supplemented with 1.5 µm IBA, with a proliferation rate of 3.4 axillary bud. The optimum rooting medium was one-fourth MS basal medium containing 93 µm IBA. Rooting of shoots was as much as 77%. Rooted plantlets were transferred to pots containing vermiculite:perlite:peat (6:1:2) and acclimatized to ambient greenhouse conditions with a 95% survival rate. This protocol can be used for in vitro propagation of P. coccinea.

Contributor Notes

This project was supported by the Jiangsu Agricultural Science and Technology Innovation Fund of China, project number CX (14) 2051, and in part by the Tennessee Agricultural Experiment Station, United States.

Corresponding author. E-mail: zcheng@utk.edu.

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    Micropropagation of Pyracantha coccinea. (A) Elongated and proliferating shoots; (B) transplanted plantlets; and (C) acclimatized plantlet.

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