Light and Plant Growth Regulators on In Vitro Proliferation

Plants

Alessandra Pellegrino¹  Valeria Cavallaro¹  Rosario Muleo²  Ivano Forgione² 

[1] Institute of BioEconomy (IBE), National Research Council of Italy, 95126 Catania, Italy;Tree Physiology and Fruit Crop Biotechnology Laboratory, Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, 01100 Viterbo, Italy;

关键词: light spectra;    light fluence rate;    photoperiod;    growth regulators;    in vitro culture;   

DOI  :  10.3390/plants11070844

来源: DOAJ

【 摘 要 】

Plant tissue cultures depend entirely upon artificial light sources for illumination. The illumination should provide light in the appropriate regions of the electromagnetic spectrum for photomorphogenic responses and photosynthetic metabolism. Controlling light quality, irradiances and photoperiod enables the production of plants with desired characteristics. Moreover, significant money savings may be achieved using both more appropriate and less consuming energy lamps. In this review, the attention will be focused on the effects of light characteristics and plant growth regulators on shoot proliferation, the main process in in vitro propagation. The effects of the light spectrum on the balance of endogenous growth regulators will also be presented. For each light spectrum, the effects on proliferation but also on plantlet quality, i.e., shoot length, fresh and dry weight and photosynthesis, have been also analyzed. Even if a huge amount of literature is available on the effects of light on in vitro proliferation, the results are often conflicting. In fact, a lot of exogenous and endogenous factors, but also the lack of a common protocol, make it difficult to choose the most effective light spectrum for each of the large number of species. However, some general issues derived from the analysis of the literature are discussed.

【 授权许可】

Unknown