LED Lighting Effects on Plant Growth and Quality of Pyrus communis L. Propagated In Vitro

Lupo, Michela; Bashir, Muhammad Ajmal; Silvestri, Cristian; Brunori, Elena; Pica, Aniello Luca; Cristofori, Valerio

doi:10.3390/agronomy12102531

Cited by 11 publications

(11 citation statements)

References 60 publications

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“…Currently, micropropagation is used for the multiplication of rootstocks and cultivars in several fruit species, such as pear, kiwi, banana, pineapple, and others [ 3 ]. Nowadays, the main challenges for micropropagation are represented by cost reduction: for example, using LED systems, efficiency enhancement, ex vitro rooting, use of plastic-free or biodegradable containers, and combining micropropagation with other systems/propagation techniques that can extend its application by replacing the conventional propagation techniques and technologies [ 9 , 10 , 11 , 12 ]. However, in the case of olive trees, only a very small percentage of plants is obtained through micropropagation.…”

Section: Introductionmentioning

confidence: 99%

“…Among the substances of natural origin that can potentially be added to growth media for olive in vitro propagation, there is neem oil also. Indeed, a previous article, [ 10 ] demonstrated that the addition of neem oil to an Olive Medium (OM) containing zeatin (4 mg L −1 ) increased the shoot length, the number of nodes, and the fresh and dry weight of shoots of olive cultivar Moraiolo.…”

Section: Introductionmentioning

confidence: 99%

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Neem Oil to Reduce Zeatin Use and Optimize the Rooting Phase in Olea europaea L. Micropropagation

Regni

Facchin

Silva

et al. 2023

Plants

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Micropropagation is an in vitro propagation technique, established in the nursery field sector for numerous species, which offers several advantages compared to traditional agamic propagation techniques. In the case of the olive tree, however, despite the advances made through research, it is still little used, due to the recalcitrance to in vitro proliferation and/or rooting of many olive cultivars and the high cost of zeatin, the only cytokinin that makes it possible to achieve a satisfactory proliferation rate in this species. In this context, numerous attempts have been made to identify alternative cytokinin compounds able to improve the proliferation rate of olive tree explants and thus reduce the unitary production cost. In particular, there is a growing interest in the use of natural substances (called in some cases “complex mixtures”), which, when added to the in vitro cultivation substrates, seem to be able to improve proliferation rates. In the present study, neem oil was added to the propagation substrates (partially/totally replacing zeatin) and in the rooting phase for the olive cultivar Moraiolo. In particular, in the proliferation phase, the effect of neem oil (0.1 mL L−1) in substrates containing different zeatin concentrations (0, 1, 2, and 4 mg L−1) was evaluated. For the rooting phase, agarized substrate and soil were used with shoots derived from a standard proliferation substrate (4 mg L−1 zeatin) and from the substrate that gave the best results in the proliferation phase (2 mg L−1 zeatin and 0.1 mL L−1 neem oil). In the proliferation phase, the addition of neem oil in the substrates with low zeatin concentration (1 and 2 mg L−1) induced an increase in the number of adventitious shoots and shoots length. On the contrary, the addition of neem oil in the rooting substrates did not positively influence the rooting phase, but positive results especially in terms of root number and length were observed in explants derived from a neem oil-enriched proliferation substrate compared to the control substrate. Therefore, the present study demonstrated for the first time the positive role of neem oil in the proliferation of olive in vitro with low zeatin concentrations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Neem Oil to Reduce Zeatin Use and Optimize the Rooting Phase in Olea europaea L. Micropropagation

Regni

Facchin

Silva

et al. 2023

Plants

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“…In the realm of solid-state lighting, white light-emitting diodes (WLEDs) hold immense promise owing to their energy efficiency and environmentally benign attributes, favorable luminous efficacy, as well as their uncomplicated and easily fabricable structures. − These light sources find applications in diverse fields, such as plant growth illumination, signaling and indicator lamps, and flat-panel displays. − Nevertheless, conventional organic phosphor resin converters suffer from obvious drawbacks, including inadequate thermal stability, low thermal conductivity, and susceptibility to aging-induced degradation and phosphor corrosion. These issues collectively lead to reduced efficiency of white light emission from the WLEDs and shortened operational lifespan of the devices. − …”

Section: Introductionmentioning

confidence: 99%

Rational Design of Nitride Phosphor-In-Glass with Robust Stability and Photoluminescence Performance

Zhang,

Ye,

Zhao

et al. 2024

Inorg. Chem.

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Phosphor-in-glass represents a promising avenue for merging the luminous efficiency of high-quality phosphor and the thermal stability of a glass matrix. Undoubtedly, the glass matrix system and its preparation are pivotal factors in achieving high stability and preserving the original performance of embedded phosphor particles. In contrast to the wellestablished commercial Y 3 Al 5 O 12 :Ce 3+ oxide phosphor, red nitride phosphor, which plays a critical role in high-quality lighting, exhibits greater structural instability during the high-temperature synthesis of inorganic glasses. A telluride glass with a refractive index (RI = 2.15@615 nm) akin to that of nitride phosphor (∼2.19) has been devised, demonstrating high efficiency in photon utilization. The lower glass-transition temperature plays a crucial role in safeguarding phosphor particles against erosion resulting from exposure to high-temperature melts. Phosphor-in-glass retains 93% of the quantum efficiency observed for pure phosphor. The assembled white light-emitting diodes module has precise color tuning capabilities, achieving an optimal color rendering index of 93.7, a luminous efficacy of 80.4 lm/W, and a correlated color temperature of 5850 K. These outcomes hold potential for advancing the realm of inorganic package and high-quality white light illumination.

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“…Currently, there are many studies demonstrating the effects of LEDs with different wavelengths (colors) on the in vitro development of Vitis riparia (Poudel et al 2008), cotton plant (Li and Tang, 2010), Cedrela ssilis (Tadeu, 2017), Helianthus tuberosus (Seedapalee et al 2021), Ficus carica var. Black Jack (Parab et al 2021), Pyrus communis (Lupo et al 2022), Pinus pseudostrobus (Marín-Martinez and Iglesias-Andreu, 2022). Gupta and Jatothu (2013) reported the best development of crops without the induction of damage or photo stress.…”

Section: Introductionmentioning

confidence: 99%

Development, chlorophyll content, and nutrient accumulation in shoots of Melaleuca alternifolia in vitro under different light wavelengths and benzylaminopurine (BAP)

Cardoso,

Gonzales-Alvarado

2024

Preprint

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In vitro growing of Melaleuca can contribute to the cloning of superior genotypes. Studies on factors affecting micropropagation are necessary, especially those using recent technologies, such as light-emitting diodes (LEDs). This study aimed at better understanding the effects of wavelengths on the development and physiology of Melaleuca cultivated in vitro, as well as the interaction of LED with N6-Benzylaminopurine (BAP), the main cytokinin used in micropropagation. The BAP and wavelengths, and their interaction, had a strong influence on most variables analyzed, altering the in vitro development and chlorophyll concentrations in the plants and changing the different variables of the culture medium, such as pH, EC, levels of Ca2+, Mg2+ and P in culture media and the nutrient accumulation in the shoots. The results demonstrated that the main effects of adding BAP in the in vitro cultivation of Melaleuca are the increase in the number of shoots, which resulted in a greater increase in fresh and dry mass, reduction in height and chlorophyll contents, complete inhibition of adventitious rooting, higher consumption of Mg and lower consumption of Ca and P from the culture media, higher contents of Fe and lower contents of P, S, Mn, Cu and B in the in vitro tissues.

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LED Lighting Effects on Plant Growth and Quality of Pyrus communis L. Propagated In Vitro

Cited by 11 publications

References 60 publications

Neem Oil to Reduce Zeatin Use and Optimize the Rooting Phase in Olea europaea L. Micropropagation

Neem Oil to Reduce Zeatin Use and Optimize the Rooting Phase in Olea europaea L. Micropropagation

Rational Design of Nitride Phosphor-In-Glass with Robust Stability and Photoluminescence Performance

Development, chlorophyll content, and nutrient accumulation in shoots of Melaleuca alternifolia in vitro under different light wavelengths and benzylaminopurine (BAP)

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