Quality assessment and nutrient uptake and utilization in Luohan pine (Podocarpus macrophyllus) seedlings raised by chitosan spraying in varied LED spectra

Qin, Song; Xu, Liang; Long, Wei; Guo, Jia; Xie, Zhaoxiong

doi:10.1371/journal.pone.0267632

Cited by 7 publications

(3 citation statements)

References 49 publications

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“…In this case, the pH of the chitosan solution was not as relevant as observed for Q. saponaria , and the growth of P. radiata seedlings was recorded for all the mixtures evaluated, even with MLVI values higher than those obtained with the control. In this sense, some researchers have pointed out that the application of chitosan to different pine species enhanced growth parameters and improved seedling quality and nutrient utilization [ 78 , 79 ]. Our result shows that the nature of the species is also an essential factor to be considered.…”

Section: Resultsmentioning

confidence: 99%

Extracted Eucalyptus globulus Bark Fiber as a Potential Substrate for Pinus radiata and Quillaja saponaria Germination

Ferrer-Villasmil,

Fuentealba,

Reyes-Contreras

et al. 2024

Plants

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This study aimed to explore alternative substrates for growing forest species using eucalyptus bark. It evaluated the potential of extracted Eucalyptus globulus fiber bark as a substitute for commercial growing media such as coconut fiber, moss, peat, and compost pine. We determined the physicochemical parameters of the growing media, the germination rate, and the mean fresh and dry weights of seedlings. We used the Munoo-Liisa Vitality Index (MLVI) test to evaluate the phytotoxicity of the bark alone and when mixed with commercial substrates. Generally, the best mixture for seed growth was 75% extracted eucalyptus bark fiber and 25% commercial substrates. In particular, the 75E-25P (peat) mixture is a promising substitute for seedling growth of Pinus radiata, achieving up to 3-times higher MLVI than the control peat alone. For Quillaja saponaria, the best growth substrate was the 50E-50C (coconut fiber) mixture, which had the most significant MLVI values (127%). We added chitosan and alginate-encapsulated fulvic acid phytostimulants to improve the performance of the substrate mixtures. The fulvic acid, encapsulated or not, significantly improved MLVI values in Q. saponaria species and P. radiata in concentrations between 0.05 and 0.1% w/v. This study suggests that mixtures with higher levels of extracted fiber are suitable for growing forest species, thus promoting the application of circular economy principles in forestry.

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Section: Resultsmentioning

confidence: 99%

Extracted Eucalyptus globulus Bark Fiber as a Potential Substrate for Pinus radiata and Quillaja saponaria Germination

Ferrer-Villasmil,

Fuentealba,

Reyes-Contreras

et al. 2024

Plants

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“…It is widely agreed that retranslocation is enhanced with time due to the increasing demand for new growth; hence, sink strength is the driver of internal nutrient cycling [ 27 , 28 ]. From this perspective, exposure to a prolonged photoperiod can be understood as a promotion of sink strength through the acceleration of shoot elongation [ 12 , 29 , 30 ]. More needs to be known about the effect of the night light spectrum on newly planted ornamental seedlings precultured with ENL.…”

Section: Introductionmentioning

confidence: 99%

Light Quality Effect on Internal N Retranslocation in Podocarpus macrophyllus Precultured with Exponential Nutrient Loading

Wang,

Sun,

2024

Plants

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Streetlamp light is inevitable in the night landscape of a city and may affect the phenology of newly planted ornamental plants, but it has rarely been fully examined. Newly transplanted ornamental plants probably suffer periodic shocks, which mainly result from the inefficient reuse of internal nutrients for new growth. Exponential nutrient loading (ENL) is well known for its ability to overcome transplant shocks by promoting retranslocation for the reuse of strengthened nutrients from internal reserves in precultured seedlings. Transplantation to urbanized lands is distinct from that of montane areas; this is mainly due to a high frequency of exposure to the artificial illumination of night lighting. It is suspected that this lighting modifies vegetative phenology and generates potential risks by increasing reliance on internal nutrient retranslocation. In this study, Podocarpus macrophyllus seedlings were cultured with ENL at low and high rates of nitrogen (N) deliveries (40 and 120 mg N seedling−1, respectively), and the high-rate treatment was identified as being able to trap seedlings within toxic states. A labeled 15N isotope was pulsed to transplanted seedlings exposed to simulated light qualities in red, green, and blue light spectra. The seedlings harvested at one month showed rare responses to the interactive spectra and preculture treatments, but most of them responded to the low-rate N preculture treatment with stronger abilities in terms of the reuse of internal N and the synthesizing of photosynthetic pigments. In conclusion, it was verified that night light enforces the effect on newly transplanted plants; the red light invoked internal N for reuse, and the blue light promoted the uptake of the current N. The internal N reserve established through preculture ENL rarely made a contribution to the night light effect, except for the enhancement of height growth in the red light. The red light spectrum was recommended for the exposure of newly transplanted seedlings due to its effect on the enhancement of the retranslocation of internal N and the induction of a steady state of uptake from the current N input.

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“…LED lamps have lower heat dissipation and more advanced radiation wavelength con guration capabilities than uorescent lamps and are applied to optimize the biological processes of each analyzed species 16 . Light quality overcomes or adapts to eld stress by changing the morphological and biological characteristics of Podocarpus macrophyllus seedlings 17 . The light environment has important effects on the morphology, physiology, and quality of plant seedlings propagated in vitro [18][19][20][21][22][23] .…”

Section: Introductionmentioning

confidence: 99%

Effects of Light Treatments on Callus Induction and Morphogenesis in Caladium bicolor

Chen,

Xie,

Guan

et al. 2023

Preprint

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Caladium bicolor is widely used as an ornamental plant outdoors and indoors due to its rich colors, diverse combinations, and strange patterns. In the commercial production of Caladium bicolor, tissue culture technology can quickly reproduce seedlings with consistent genetic properties. In practice, there are still aspects that can be improved in terms of energy dissipation and ornamental value when using fluorescent lamps. In this experiment, the light intensity had no significant effect on the induction of callus and the germination rate, but from the number of buds per explant increased. Different light waves affect the occurrence of seedlings of Caladium bicolor. Among them, a single light source, LED-Red, is not conducive to callus differentiation, plant height, and carotenoid accumulation compared to other treatments; LED-Blue is beneficial for the formation of relative anthocyanin content and plant height.LED-White is beneficial for leaf size. Fluorescence is not conducive to increasing the total number of seedlings, which is important for production. Compared with fluorescence, the transplanting rate of LED-Blue increased by 94.92%. The results of this experiment suggest that LED light can replace florescent lamps in tissue culture for achieving low energy consumption and high efficiency.

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Quality assessment and nutrient uptake and utilization in Luohan pine (Podocarpus macrophyllus) seedlings raised by chitosan spraying in varied LED spectra

Cited by 7 publications

References 49 publications

Extracted Eucalyptus globulus Bark Fiber as a Potential Substrate for Pinus radiata and Quillaja saponaria Germination

Extracted Eucalyptus globulus Bark Fiber as a Potential Substrate for Pinus radiata and Quillaja saponaria Germination

Light Quality Effect on Internal N Retranslocation in Podocarpus macrophyllus Precultured with Exponential Nutrient Loading

Effects of Light Treatments on Callus Induction and Morphogenesis in Caladium bicolor

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