Effect of Different Ratios of Red and Blue Light on Maximum Stomatal Conductance and Response Rate of Cucumber Seedling Leaves

Li, Xue; Zhao, Shuaiguo; Lin, Apeng; Yang, Yuanyuan; Zhang, Guanzhi; Xu, Ping; Wu, Yongjun; Yang, Zhenchao

doi:10.3390/agronomy13071941

Cited by 7 publications

(6 citation statements)

References 61 publications

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“…Interestingly, Melaleuca cultivated in vitro under blue LED light presented the lowest density of stomata, regardless of the presence of BAP. The opposite was observed in Cucumber seedlings, in which the relative reduction in red light and the increase in blue light resulted in the highest stomatal density (Li et al 2023). Izzo et al (2021) reported reduced stomatal density both under red or blue monochromatic light, while their combination (red + blue light) increased stomatal density.…”

Section: Discussionmentioning

confidence: 94%

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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Section: Discussionmentioning

confidence: 94%

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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“…Similarly, in our previous research [3], we documented that both long-term R-and B-light treatment increased NPQ amplitude, while G and RGB light lowered its value due to the reduced accumulation of NPQ-related proteins. At the same time, previous research [12,[21][22][23][24] has shown that the quality of growth light influences gas exchange, especially due to the modification of stomatal development and movement. The main conclusions from these studies are that B light stimulates stomata opening more than R light, while the addition of G light to the spectrum reduces stomatal conductance via both contractions of stomata dimension and density, as well as reduced stomatal openness.…”

Section: Discussionmentioning

confidence: 95%

Growth Light Quality Influences Leaf Surface Temperature by Regulating the Rate of Non-Photochemical Quenching Thermal Dissipation and Stomatal Conductance

Trojak,

Skowron

2023

IJMS

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Significant efforts have been made to optimise spectrum quality in indoor farming to maximise artificial light utilisation and reduce water loss. For such an improvement, green (G) light supplementation to a red–blue (RB) background was successfully employed in our previous studies to restrict both non-photochemical quenching (NPQ) and stomatal conductance (gs). At the same time, however, the downregulation of NPQ and gs had the opposite influence on leaf temperature (Tleaf). Thus, to determine which factor plays the most prominent role in Tleaf regulation and whether such a response is temporal or permanent, we investigated the correlation between NPQ and gs and, subsequently, Tleaf. To this end, we analysed tomato plants (Solanum lycopersicum L. cv. Malinowy Ozarowski) grown solely under monochromatic LED lamps (435, 520, or 662 nm; 80 µmol m−2 s−1) or a mixed RGB spectrum (1:1:1; 180 µmol m−2 s−1) and simultaneously measured gs and Tleaf with an infrared gas analyser and a thermocouple or an infrared thermal camera (FLIR) during thermal imaging analyses. The results showed that growth light quality significantly modifies Tleaf and that such a response is not temporal. Furthermore, we found that the actual adaxial leaf surface temperature of plants is more closely related to NPQ amplitude, while the temperature of the abaxial surface corresponds to gs.

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“…Notably, a strong positive correlation was reported between NIR reflectance and stomatal conductance [31]. Moreover, the increase in stomatal conductance can promote the enhancement of photosynthesis [32][33][34]. Therefore, the changes in tea seedlings' leaf structure in the STS pattern are worthy of further study.…”

Section: Soybean-tea Intercropping Changed the Spectral Characteristi...mentioning

confidence: 97%

The Effects of Soybean–Tea Intercropping on the Photosynthesis Activity of Tea Seedlings Based on Canopy Spectral, Transcriptome and Metabolome Analyses

Li,

Xu,

Mao

et al. 2024

Agronomy

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Intercropping soybean in tea plantations is a sustainable cultivation system that can improve the growing environment of tea plants compared to monoculture tea. However, the effects of this system on the photosynthesis activity of tea seedlings have yet to be reported. Therefore, we used tea cultivar ‘Zhongcha108’ as experimental materials to investigate the effects of intercropping soybean on the canopy spectral parameters and photosynthesis activity of tea seedlings. Canopy spectral reflectance data showed that soybean–tea intercropping (STS) improved the reflectance of 720, 750 and 840 nm bands in tea seedlings’ canopy. The vegetation indexes (VIs) value related to photosynthetic pigments in STS was obviously higher than monoculture tea (T). In addition, the Fv/Fm and SPAD value in STS were also clearly higher. Transcriptome analysis data indicated that STS induced the expression of light-harvesting complex (LHC) genes, photosystem subunit (Psbs and Psas) genes and dark reaction biological process genes (FBP1, RPE, Calvin cycle protein CP12-1 and transketolase). These results indicate that STS enhanced the photosynthesis activity. The metabolome analysis showed that STS promoted the accumulation of carbohydrate metabolites, which further provided evidence for the enhancement of photosynthesis in the leaves of tea seedlings. This study enhanced our understanding of how intercropping soybeans in a young tea plantation improves the photosynthesis activity to promote tea seedlings’ growth and development.

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Effect of Different Ratios of Red and Blue Light on Maximum Stomatal Conductance and Response Rate of Cucumber Seedling Leaves

Cited by 7 publications

References 61 publications

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

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

Growth Light Quality Influences Leaf Surface Temperature by Regulating the Rate of Non-Photochemical Quenching Thermal Dissipation and Stomatal Conductance

The Effects of Soybean–Tea Intercropping on the Photosynthesis Activity of Tea Seedlings Based on Canopy Spectral, Transcriptome and Metabolome Analyses

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