scholarly journals Light sources with different spectra affect root and mycorrhiza formation in Scots pine in vitro

2005 ◽  
Vol 25 (1) ◽  
pp. 123-128 ◽  
Author(s):  
K. Niemi ◽  
R. Julkunen-Tiitto ◽  
R. Tegelberg ◽  
H. Haggman
Keyword(s):  
Scots Pine ◽  
Light Sources ◽  
Mycorrhiza Formation

scholarly journals Application of Light-Emitting Diodes for Improving the Nutritional Quality and Bioactive Compound Levels of Some Crops and Medicinal Plants

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1477
Author(s):  
Woo-Suk Jung ◽  
Ill-Min Chung ◽  
Myeong Ha Hwang ◽  
Seung-Hyun Kim ◽  
Chang Yeon Yu ◽  
...  
Keyword(s):  
Plant Growth ◽  
In Vitro Culture ◽  
Light Emitting Diodes ◽  
Photosynthetic Pigment ◽  
Antioxidant Properties ◽  
Light Sources ◽  
Light Emitting ◽  
Cell Defense ◽  
Led Irradiation

Light is a key factor that affects phytochemical synthesis and accumulation in plants. Due to limitations of the environment or cultivated land, there is an urgent need to develop indoor cultivation systems to obtain higher yields with increased phytochemical concentrations using convenient light sources. Light-emitting diodes (LEDs) have several advantages, including consumption of lesser power, longer half-life, higher efficacy, and wider variation in the spectral wavelength than traditional light sources; therefore, these devices are preferred for in vitro culture and indoor plant growth. Moreover, LED irradiation of seedlings enhances plant biomass, nutrient and secondary metabolite levels, and antioxidant properties. Specifically, red and blue LED irradiation exerts strong effects on photosynthesis, stomatal functioning, phototropism, photomorphogenesis, and photosynthetic pigment levels. Additionally, ex vitro plantlet development and acclimatization can be enhanced by regulating the spectral properties of LEDs. Applying an appropriate LED spectral wavelength significantly increases antioxidant enzyme activity in plants, thereby enhancing the cell defense system and providing protection from oxidative damage. Since different plant species respond differently to lighting in the cultivation environment, it is necessary to evaluate specific wavebands before large-scale LED application for controlled in vitro plant growth. This review focuses on the most recent advances and applications of LEDs for in vitro culture organogenesis. The mechanisms underlying the production of different phytochemicals, including phenolics, flavonoids, carotenoids, anthocyanins, and antioxidant enzymes, have also been discussed.

scholarly journals AgNO3 improved micropropagation and stimulate in vitro flowering of rose (Rosa x hybrida) cv. Sena

2021 ◽  
Vol 27 (1) ◽  
pp. 33-40
Author(s):  
Ana Victória Conde da Silva de Matos ◽  
Bárbara Samantha de Oliveira ◽  
Maria Eduarda Barboza Souza de Oliveira ◽  
Jean Carlos Cardoso
Keyword(s):  
In Vitro Flowering ◽  
Light Sources ◽  
Multiplication Rate ◽  
Cut Flower ◽  
Physiological Disorders ◽  
Fluorescent Lamps ◽  
The Rose ◽  
Disease Free ◽  
Early Leaf Senescence

Abstract Rose is one of the most important cut flower in the world. Rose micropropagation was used for production of clonal and disease-free plantlets and to breeding purposes. However, many important rose cultivars showed physiological disorders as early-leaf senescence and very low multiplication rate under in vitro conditions. Our hypothesis is that these symptoms were associated with high sensibility of these cultivars to ethylene accumulation on in vitro environment. The rose cv. Sena was in vitro cultivated under different concentrations of AgNO3 and two light sources, LED and fluorescent lamps, as a way to investigate in vitro similar symptoms to ethylene accumulation. AgNO3 at 1.0-2.0 mg L-1 solved the main in vitro physiological disorders observed in this rose cultivar. Also, AgNO3 stimulated induction of 50% of rose shoots to in vitro flowering at 2.0 mg L-1. Higher concentrations also resulted in flowering induction, but with imperfect flower development.

Impact of LED light sources on morphogenesis and levels of photosynthetic pigments in Gerbera jamesonii grown in vitro

2018 ◽  
Vol 59 (1) ◽  
pp. 115-123 ◽  
Author(s):  
Bożena Pawłowska ◽  
Marek Żupnik ◽  
Bożena Szewczyk-Taranek ◽  
Monika Cioć
Keyword(s):  
Photosynthetic Pigments ◽  
Light Sources ◽  
Gerbera Jamesonii ◽  
Led Light

scholarly journals IN VITRO DEVELOPMENT OF YELLOW LAPACHO (BIGNONIACEAE) USING HIGH-POWER LIGHT EMITTING DIODE

2018 ◽  
Vol 42 (5) ◽  
Author(s):  
Ezequiel Enrique Larraburu ◽  
Gonzalo Sanchez Correa ◽  
Berta Elizabet Llorente
Keyword(s):  
In Vitro Culture ◽  
High Power ◽  
Stomatal Density ◽  
Light Emitting Diode ◽  
Dry Weight ◽  
Light Sources ◽  
Multiplication Rate ◽  
Light Emitting ◽  
Shoot Dry Weight

ABSTRACT Handroanthus ochraceus (yellow lapacho) is a medicinal, ornamental and timber tree which can be propagated by in vitro culture. Conventional methods use fluorescent lighting (FL), whereas light emitting diode (LED) has been used for this purpose only recently. The aim of this work was to evaluate the effects of FL and high-power LED (HP-LED) on the in vitro multiplication and rooting of yellow lapacho at different irradiances (15 to 60 µmol m-2s-1). Epicotyls obtained from half-siblings was multiplicated in WPM (Woody Plant Medium) supplemented with 20 µM benzilaminopurine and 1 mM IBA (indolebutiric acid). For rooting, shoots were cultured for 3 days in ½WPM supplemented with 50 µM IBA and for 42 days in auxin-free ½WPM under HP-LED or FL lighting. Under HP-LED, the multiplication rate of shoots increased significantly (61%) from 20 to 40 µmol m-2s-1 respect to FL. Differences in abaxial stomatal density and size were observed between light sources at 20 µmol m-2s-1. High HP-LED irradiance produced the highest rooting percentage. In the rooting stage, the marginal means of treatments without factors interaction showed that HP-LED irradiances significantly increased shoot length by 20%, shoot fresh weight by 77% and shoot dry weight by 30% in comparison to the values under FL. The maximum values calculated from the regression curves were around 50 µmol m-2 s-1 for HP-LED for all parameters except root lenght whereas were around 20 µmol m-2 s-1 for FL for all parameters except fresh and dry weigth of shoot. Here we show that HP-LED lighting improve in vitro culture of H. ochraceus, reduced 81% energy consumption respect to FL and uses only a multispectral LED instead of different single color LEDs. Therefore, HP-LED could be useful for the micropropagation of tree species contributing to sustainable agriculture and ecological restoration of degraded areas.

Micropropagation of Pinus massoniana and mycorrhiza formation in vitro

2010 ◽  
Vol 102 (1) ◽  
pp. 121-128 ◽  
Author(s):  
Li-Hua Zhu ◽  
Xiao-Qin Wu ◽  
Hong-Ye Qu ◽  
Jing Ji ◽  
Jian-ren Ye
Keyword(s):  
Pinus Massoniana ◽  
Mycorrhiza Formation
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