NDLI: Effect of light and natural ventilation systems on the growth parameters and carvacrol content in the in vitro cultures of Plectranthus amboinicus (Lour.) Spreng

Content Provider	Springer Nature Link
Author	Silva, Sâmia Torres Bertolucci, Suzan Kelly Vilela Cunha, Samuel Henrique Braga Lazzarini, Luiz Eduardo Santos Tavares, Marília Claudia Pinto, José Eduardo Brasil Pereira
Copyright Year	2017
Abstract	The aim of the current study is to investigate the influence of light intensity, quality of light and alternative membrane sytems on the growth and headspace-GC/MS chemical analysis of Plectranthus amboinicus cultivated in vitro. Nodal segments were grown under light intensities (26, 51, 69, 94 and 130 µmol m$^{−2}$ s$^{−1}$) provided by cool-white fluorescent lamps. Apical segments were grown under light-emitting diodes blue; red; 1 blue/2.5 red; 2.5 blue/1 red; 1 blue/1 red and white fluorescent lamps. Apical and nodal segments were grown under alternative membrane and membrane-free systems. One, two or four PTFE membranes were used on the lid of the culture vessel. The membranes provided natural ventilation and worked as filters. The results have shown significant differences in the growth and carvacrol content, as well as in the content of carvacrol precursors (γ-terpinene and p-cymene) in different treatments. Among all tested light intensities, the significant increase in the dry weight and in the carvacrol content of plantlets derived from the nodal segments was recorded at 69 µmol m$^{−2}$ s$^{−1}$. The monochromatic red led to greater shoot length and higher dry weight in plantlets derived from the apical segments, as well as to carvacrol accumulation greater than that provided by the fluorescent lamps. The culture vessel enclosure by one and two membranes led to higher dry weight in plantlets derived from the apical and nodal segments, respectively. They also showed higher carvacrol content. Thus, it is possible optimizing the growth and carvacrol content in P. amboinicus cultivated in vitro by adjusting these environmental parameters.
Starting Page	501
Ending Page	510
Page Count	10
File Format	PDF
ISSN	01676857
Journal	Plant Cell, Tissue and Organ Culture (PCTOC)
Volume Number	129
Issue Number	3
e-ISSN	15735044
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-03-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Irradiances Light spectrum Gas exchange Medicinal plant LEDs Plant Sciences Plant Physiology Plant Genetics & Genomics Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Horticulture

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