Effect of Light Intensity on the Growth and Antioxidant Activity of Sweet Basil and Lettuce

Sutulienė, Rūta; Laužikė, Kristina; Pukas, Tomas; Samuolienė, G.

doi:10.3390/plants11131709

Cited by 34 publications

(18 citation statements)

References 44 publications

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“…We also showed that CGA accumulates in photosynthetically active organs like stems and leaves and its accumulation is higher when leaves are exposed to high light indicating that CGA biosynthesis is regulated by light intensity. This is consistent with the evidence that under high light conditions, the total amount of phenolics increases and is accompanied by induction of several genes of the phenylpropanoid pathway (Linatoc et al, 2018;Peŕez-Loṕez et al, 2018;Sutulienėet al, 2022). Photosynthesis is a vital process for the plant which requires protection from harmful UV light and from toxic molecules, like ROS, usually produced by plant cells during normal photosynthesis.…”

Section: Role Of Cgas In Photosynthetically and Non-photosyntheticall...supporting

confidence: 89%

Exploring the metabolic and physiological roles of HQT in S. lycopersicum by gene editing

et al. 2023

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The most abundant phenolic compound in Solanaceous plants is chlorogenic acid (CGA), which possesses protective properties such as antimicrobial and antioxidant activities. These properties are particularly relevant when plants are under adverse conditions, such as pathogen attack, excess light, or extreme temperatures that cause oxidative stress. Additionally, CGA has been shown to absorb UV-B light. In tomato and potato, CGA is mainly produced through the HQT pathway mediated by the enzyme hydroxycinnamoyl-CoA:quinate hydroxycinnamoyl transferase. However, the absence of natural or induced mutants of this gene has made it unclear whether other pathways contribute to CGA production and accumulation. To address this question, we used CRISPR technology to generate multiple knock-out mutant lines in the tomato HQT gene. The resulting slhqt plants did not accumulate CGA or other caffeoylquinic acids (CQAs) in various parts of the plant, indicating that CQA biosynthesis depends almost entirely on the HQT pathway in tomato and, likely, other Solanaceous crops. We also found that the lack of CGA in slhqt plants led to higher levels of hydroxycinnamoyl-glucose and flavonoids compared to wild-type plants. Gene expression analysis revealed that this metabolic reorganization was partly due to flux redirection, but also involved modulation of important transcription factor genes that regulate secondary metabolism and sense environmental conditions. Finally, we investigated the physiological role of CGA in tomato and found that it accumulates in the upper epidermis where it acts as a protector against UV-B irradiation.

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Section: Role Of Cgas In Photosynthetically and Non-photosyntheticall...supporting

confidence: 89%

Exploring the metabolic and physiological roles of HQT in S. lycopersicum by gene editing

et al. 2023

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“…We confirmed that TFC was significantly increased in both the flavonoid pathway-related DEGs. Furthermore, light intensity affects antioxidant system activity in basil and lettuce; for example, under strong light intensity, the DPPH, ABTS, and FRAP showed decreased activities in basil, and increased activity in lettuce (Sutulienėet al, 2022). Although the effects of light intensity on antioxidant activity have been reported in other plants, we did not observe significant differences in fennel under different light conditions, unlike in the case of CO 2 .…”

Section: B a Figurecontrasting

confidence: 69%

Elevated CO2 concentration induces changes in plant growth, transcriptome, and antioxidant activity in fennel (Foeniculum vulgare Mill.)

Lee

Byeon

et al. 2022

Front. Plant Sci.

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IntroductionFennel (Foeniculum vulgare Mill.) is widely used to produce natural bio-materials. Elevated CO2 (eCO2) concentrations in the atmosphere improve the net photosynthesis of plants.MethodsThe aim of the present study was to investigate distinct changes in fennel growth characteristics and phytonutrient contents under different CO2 concentrations. The effects of 400 and 800 ppm concentrations on plant growth and antioxidant activity were observed under hydroponics.Results and DiscussionPlant growth was improved by eCO2 concentrations. We also observed diverse changes in nutrient solution (pH, electrical conductivity, and dissolved oxygen) and environmental factors (temperature and humidity) in greenhouse under light or dark conditions. Electrical conductivity increased under dark and eCO2 conditions, whereas the pH decreased. Additionally, we performed transcriptome analysis and identified CO2-responsive differentially expressed genes. In the 800 ppm group, genes involved in photosynthesis and Karrikin response were upregulated whereas those involved in syncytium formation were downregulated. Four upregulated differentially expressed genes involved in flavonoid biosynthesis and total flavonoid content were relatively increased under the 800 ppm CO2 condition. In contrast, antioxidant activity, including total phenolic content, scavenging activity, ferric ion reducing antioxidant power, and reducing power were decreased in fennel under relatively high eCO2 concentrations. Moreover, different light intensities of 12 or 24 lx did not affect the growth and antioxidant activity of fennel, suggesting eCO2 has a stronger effect on plant improvement than light intensity. The results of the present study enhance our understanding of the positive effects of CO2 on the growth and antioxidant activity of fennel.

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“…Assimilate used for high respiration causes assimilate to be transported to lower plant parts, resulting in low plant growth. Low light intensity caused a decrease in the rate of photosynthesis and carbohydrate synthesis, thereby limiting plant growth [13].…”

Section: Discussionmentioning

confidence: 99%

The growth of mahogany seedlings (Swietenia macrophylla King.) in various planting media and shade intensity

Tanjung,

Tata,

Triadiati

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Swietenia macrophylla has potential in the economic, health and environmental sectors; so, this tree is one of the species used for forest rehabilitation. The growth of S. macrophylla is influenced by environmental factors, including the quality of the growing medium and shade intensity. This study aimed to obtain the right planting medium and shade for the growth of S. macrophylla seedlings. This research was conducted using a split-plot design with randomized groups. The main plot was shade using paranet which consists of 2 levels, while the subplot was the planting medium which consists of 5 levels. The results showed that the interaction of mineral soil medium treatment and without shade resulted in the highest seedlings height and total fresh weight in mahogany seedlings. The quality index of mahogany seedlings (SQI) is influenced by no-shade treatment

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Effect of Light Intensity on the Growth and Antioxidant Activity of Sweet Basil and Lettuce

Cited by 34 publications

References 44 publications

Exploring the metabolic and physiological roles of HQT in S. lycopersicum by gene editing

Exploring the metabolic and physiological roles of HQT in S. lycopersicum by gene editing

Elevated CO2 concentration induces changes in plant growth, transcriptome, and antioxidant activity in fennel (Foeniculum vulgare Mill.)

The growth of mahogany seedlings (Swietenia macrophylla King.) in various planting media and shade intensity

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