Growth, Photosynthesis, and Nutrient Uptake at Different Light Intensities and Temperatures in Lettuce

Zhou, Jing; Li, Pingping; Wang, Jizhang; Fu, Weiguo

doi:10.21273/hortsci14161-19

Cited by 32 publications

(26 citation statements)

References 44 publications

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“…This is similar to the previous research (Feijó et al 2009). Interestingly, we found that the leaf number increased with decreased light intensity, which may be the morphological change because E. senticosus adapted to the shading environment (Kim et al 2019, Zhou et al 2019. The reason why Z1 promoted the growth of E. senticosus might Fig.…”

Section: Discussionsupporting

confidence: 91%

Effects of light intensity on the growth, photosynthetic characteristics, and secondary metabolites of Eleutherococcus senticosus Harms

Xu¹,

Wu²,

Liu³

et al. 2020

Photosynt.

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In this investigation, we used the growth, photosynthetic physiological parameters, and targeted metabolite analysis to evaluate the responses of Eleutherococcus senticosus in different shading treatments. The results showed that the moderate shading treatment (Z1) promoted the growth and inhibited photosynthesis of plants. The severe shading treatment (Z2) inhibited both the growth and photosynthesis of the plants. Besides, Z1 had no significant effect on the PSII, while Z2 inhibited the PSII. Most of the eight medicinal metabolites accumulated in the Z1. The C6C1-and C6C3-type phenolics accumulated in the Z1, and the C6C3C6-type in the Z2. In conclusion, the moderate shading treatment accumulated more defensive phenolics; this might be the reason for this shading condition promoting the growth and the accumulation of medicinal metabolites of the plant. The result of this study laid a theoretical foundation for the further study of shading treatments on the secondary metabolism of Eleutherococcus senticosus.

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Section: Discussionsupporting

confidence: 91%

Effects of light intensity on the growth, photosynthetic characteristics, and secondary metabolites of Eleutherococcus senticosus Harms

Xu¹,

Wu²,

Liu³

et al. 2020

Photosynt.

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“…Light sources that are derived from energy-saving LEDs are a prospective tool for plant cultivation [ 2 , 3 , 18 , 49 , 50 ] because LED light can have specific narrow spectral bands; its intensity and time regime can be regulated within wide range. The influence of the light characteristics on the plants can be related to both the amount of light that is absorbed by the photosynthetic light harvesting complexes (and the further electron transfer) [ 1 , 2 , 3 ] and to the light-induced activation of the photoreceptors (e.g., phytochromes, cryptochromes, or phototropins [ 23 , 24 , 25 ]).…”

Section: Discussionmentioning

confidence: 99%

“…The aim of the present work was the analysis of influence of two variants of illumination spectra during cultivation on the physiological parameters of lettuce, including the parameters of photosynthetic dark and light reactions, dark respiration rate, growth parameters, and the main reflectance indices of the leaves. Green leaf lettuce ( Lactuca sativa L.) was used in this investigation because it is an important agricultural plant that is widely cultivated under artificial illumination (including illumination by LEDs with narrow spectral bands [ 49 , 50 , 51 , 52 ]). The first variant of illumination (the “red” variant) included red and white light with a small portion of the blue light (<10% from the total light intensity and 13% from the red light intensity) because this cultivation variant causes relatively high rates of growth and photosynthesis in lettuce [ 41 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

Ratio of Intensities of Blue and Red Light at Cultivation Influences Photosynthetic Light Reactions, Respiration, Growth, and Reflectance Indices in Lettuce

Yudina

Sukhova

Mudrilov

et al. 2022

Biology

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LED illumination can have a narrow spectral band; its intensity and time regime are regulated within a wide range. These characteristics are the potential basis for the use of a combination of LEDs for plant cultivation because light is the energy source that is used by plants as well as the regulator of photosynthesis, and the regulator of other physiological processes (e.g., plant development), and can cause plant damage under certain stress conditions. As a result, analyzing the influence of light spectra on physiological and growth characteristics during cultivation of different plant species is an important problem. In the present work, we investigated the influence of two variants of LED illumination (red light at an increased intensity, the “red” variant, and blue light at an increased intensity, the “blue” variant) on the parameters of photosynthetic dark and light reactions, respiration rate, leaf reflectance indices, and biomass, among other factors in lettuce (Lactuca sativa L.). The same light intensity (about 180 µmol m−2s−1) was used in both variants. It was shown that the blue illumination variant increased the dark respiration rate (35–130%) and cyclic electron flow around photosystem I (18–26% at the maximal intensity of the actinic light) in comparison to the red variant; the effects were dependent on the duration of cultivation. In contrast, the blue variant decreased the rate of the photosynthetic linear electron flow (13–26%) and various plant growth parameters, such as final biomass (about 40%). Some reflectance indices (e.g., the Zarco-Tejada and Miller Index, an index that is related to the core sizes and light-harvesting complex of photosystem I), were also strongly dependent on the illumination variant. Thus, our results show that the red illumination variant contributes a great deal to lettuce growth; in contrast, the blue variant contributes to stress changes, including the activation of cyclic electron flow around photosystem I.

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“…For plant growth, light is a critical environmental component. Plants use photosynthesis to convert light energy into adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate (NADPH) in light reactions [6].…”

Section: Introductionmentioning

confidence: 99%

Performance of lettuce plants under organic mulch and LEDs light colors

Sadek¹,

Moursy²,

Younis³

2021

GSC Adv. Res. Rev.

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This study was performed out at net house, privet farm, Cairo-Alexandria desert road, 80 Km, to present the positive role of using different types of organic mulch; different LEDS (light-emitting diodes) light colors and their combination on lettuce plants as growth and yield. Three types of organic mulch i.e., (mushroom wastes, compost and palm fibers) compared to bare soil and four LEDs light colors i.e., (white, yellow, green and "red + blue + green") plus natural light. Seedlings of lettuce cv. Iceberg were transplanting at 1st November through 2019 and 2020seasons. The study was conducted in a split plot design with three replications. Results obtained that using different types of organic mulch, different LEDs light colors and their combination had a significant overall tested parameters (plant length, number of leaves/head, fresh and dry weights of leaves, leaves contents from N, P and K and total heads yield/m2). In general, cultivated lettuce plants with using different types organic mulch and different LEDs light colors enhanced all tested parameters compared to bare soil or/and natural light. The most positive role of tested factors was noticed with using compost mulch, LEDs "R + B+ G" colors and their combination as compost mulch plus LEDs "R + B+ G colors", which, had greatest values of all tested parameters more than other treatments.

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Growth, Photosynthesis, and Nutrient Uptake at Different Light Intensities and Temperatures in Lettuce

Cited by 32 publications

References 44 publications

Effects of light intensity on the growth, photosynthetic characteristics, and secondary metabolites of Eleutherococcus senticosus Harms

Effects of light intensity on the growth, photosynthetic characteristics, and secondary metabolites of Eleutherococcus senticosus Harms

Ratio of Intensities of Blue and Red Light at Cultivation Influences Photosynthetic Light Reactions, Respiration, Growth, and Reflectance Indices in Lettuce

Performance of lettuce plants under organic mulch and LEDs light colors

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