Nursery Paper May 2015

Plant photosynthetic growth and photomorphogenesis under LED light

Light is undeniably one of the most influential, complex and particularly challenging factors to control in plant development.

To meet the demands of peak sales a majority of production will occur in late winter to early spring, however natural light levels or the photosynthetic daily light integral (DLI) is understandably low at this time of year. Fortunately, the level required to produce quality material can be supplemented with additional lighting. The use of artificial light is technology worth exploration in Australian nurseries, in order to increase production and quality. This is supported by recent studies suggesting that growers can benefit from supplementary lighting such as light emitting diodes (LEDs), high-pressure sodium lights (HPS) and numerous other alternatives.