Effect of different light intensity on physiology, antioxidant capacity and photosynthetic characteristics on wheat seedlings under high CO2 concentration in a closed artificial ecosystem

Yi, Zhihao; Cui, Jingjing; Fu, Yuming; Hong, Liu

doi:10.1007/s11120-020-00726-x

Cited by 24 publications

(16 citation statements)

References 77 publications

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“…Besides, many factors can influence stomatal behavior, including light, CO 2 concentration, and temperature [ 58 ]. Some previous studies suggested that light intensity can enhance stomatal conductance in plants [ 59 , 60 , 61 ]. Simultaneously, both lower and excessive light can reduce the photosynthetic rate and stomatal conductance [ 61 ].…”

Section: Resultsmentioning

confidence: 99%

“…Some previous studies suggested that light intensity can enhance stomatal conductance in plants [ 59 , 60 , 61 ]. Simultaneously, both lower and excessive light can reduce the photosynthetic rate and stomatal conductance [ 61 ]. It has also been known that the photosynthetic rate depends on chlorophyll content, and it can be affected by any change in it [ 62 , 63 ].…”

Section: Resultsmentioning

confidence: 99%

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Cannabinoids Accumulation in Hemp (Cannabis sativa L.) Plants under LED Light Spectra and Their Discrete Role as a Stress Marker

Islam

Ryu

Azad

et al. 2021

Biology

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Hemp adaptability through physiological and biochemical changes was studied under 10 LED light spectra and natural light in a controlled aeroponic system. Light treatments were imposed on 25 days aged seedlings for 16 h daily (300 µmol m−2 s−1) for 20 days. Plant accumulated highest Cannabidiol (CBD) in R7:B2:G1 light treatment, with relatively higher photosynthetic rate and lower reactive oxygen species, total phenol content, total flavonoid content, DPPH radical scavenging capacity, and antioxidant enzymatic activities. Tetrahydrocannabinol (THC) also accumulated at a higher level in white, R8:B2, and R7:B2:G1 light with less evidence of stress-modulated substances. These results indicated that CBD and THC have no or little relation with light-mediated abiotic stress in hemp plants. On the contrary, Tetrahydrocannabinolic acid (THCA) was accumulated higher in R6:B2:G1:FR1 and R5:B2:W2:FR1 light treatment along with lower photosynthetic rate and higher reactive oxygen species, total phenol content, total flavonoid content, DPPH radical scavenging capacity, and antioxidant enzymatic activities. However, Cannabidiolic acid (CBDA) was accumulated higher in R6:B2:G1:FR1 light treatment with higher stress-modulated substances and lower physiological traits. CBDA was also accumulated higher in R8:B2 and R7:B2:G1 light treatments with less evidence of stress-modulated substances. Besides, Greenlight influenced CBD and CBDA synthesis where FR and UV-A (along with green) play a positive and negative role in this process. Overall, the results indicated that the treatment R7:B2:G1 enhanced the medicinal cannabinoids most, and the role of THCA as a stress marker is more decisive in the hemp plant than in other cannabinoids under attributed light-mediated stress.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Cannabinoids Accumulation in Hemp (Cannabis sativa L.) Plants under LED Light Spectra and Their Discrete Role as a Stress Marker

Islam

Ryu

Azad

et al. 2021

Biology

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“…Yang et al [3] suggest that both light quality and intensity affected plant physiology and biochemistry via changes in photosynthesis, leaf anatomy, and hormone contents. Additionally, higher light intensities have improved the antioxidant defense biochemistry, physiology, and photosynthesis characteristics of wheat seedlings in contrast to low light intensities [4]. As we all know, light is necessary for photosynthesis, and low light stress (LL) compromises plants' photosynthetic efficiency; thus, low light is considered one of the main limiting growth factors [5].…”

Section: Introductionmentioning

confidence: 99%

Low Light Alters the Photosynthesis Process in Cigar Tobacco via Modulation of the Chlorophyll Content, Chlorophyll Fluorescence, and Gene Expression

Khan

Gao

et al. 2021

Agriculture

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Shading or low light (LL) conditions are a key and necessary cultivation technique in cigar wrapper tobacco production. However, the effect of low light on the photosynthesis in cigar tobacco is not clear. Therefore, this study is designed to know the photosynthesis of cigar tobacco under different light intensities (T200, T100, and T50 μmol m−2 s−1). The results reveal that under low light, T50 especially improved the light interception and increased carbon utilization, as witnessed by a higher specific leaf area and lower specific leaf weight. Low light intensity caused better light interception and carbon utilization in cigar tobacco leaves, and thus thinner leaves are more able to use low light efficiently. The chlorophyll content is related to the photosynthesis process; thus, LL affected the photosynthesis process by lowering the chlorophyll content. Similarly, LL also altered the photosynthetic efficiency by lowering the QY_Lss, qP_Lss, and Rfd_Lss. Additionally, higher expression of Lhcb4.2, Lhcb6, PsbA, PsbB, and PsbD under low light, especially T50, shows that the PSII and antenna proteins complex efficiently utilized the absorbed energy for photosynthesis. Finally, the lower photosynthesis, particularly in T50, is attributed to the downregulation of genes related to NADPH production (petH) and the rubisco enzyme synthesis-related gene (rbcs) for CO2 fixation in the Calvin cycle. Overall, the results show that the photosynthesis is decreased under LL intensities which might be related to lower chlorophyll content and downregulation of petH and rbcs genes.

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“…Besides, many factors can in uence stomatal behavior, including light, CO 2 concentration, and temperature 46 . Some previous studies suggested that light intensity can enhance stomatal conductance in plants [47][48][49] . Simultaneously, the photosynthetic rate and stomatal conductance can be reduced under both lower and excessive light 49 .…”

Section: Resultsmentioning

confidence: 95%

“…Some previous studies suggested that light intensity can enhance stomatal conductance in plants [47][48][49] . Simultaneously, the photosynthetic rate and stomatal conductance can be reduced under both lower and excessive light 49 . It has also been known that the photosynthetic rate depends on chlorophyll content, and it can be affected by any change in it 50,51 .…”

Section: Resultsmentioning

confidence: 95%

Cannabinoids accumulation in hemp (Cannabis sativa L) plants under LED light spectra and their discrete role as a stress marker

Islam

Azad

Ryu

et al. 2020

Preprint

View full text Add to dashboard Cite

Hemp adaptability through physiological and biochemical changes was studied under 10 LED light spectra and natural light in a controlled aeroponic system. Light treatments were imposed on 25 days aged seedlings for 16 hours daily (300 µmol m-2s-1) for 20 days. Plant accumulated highest Cannabidiol (CBD) in R7:B2:G1 light treatment, with relatively higher photosynthetic rate and lower reactive oxygen species, total phenol content, total flavonoid content, DPPH radical scavenging capacity, and antioxidant enzymatic activities. Tetrahydrocannabinol (THC) also accumulated higher in white, R8:B2, and R7:B2:G1 light with less evidence of stress modulated substances. These results indicated that CBD and THC have no or little relation with light-mediated abiotic stress in hemp plants. On the contrary, Tetrahydrocannabinolic acid (THCA) was accumulated higher in R6:B2:G1:FR1 and R5:B2:W2:FR1 light treatment along with lower photosynthetic rate and higher reactive oxygen species, total phenol content, total flavonoid content, DPPH radical scavenging capacity, and antioxidant enzymatic activities. However, Cannabidiolic acid (CBDA) was accumulated higher in R6:B2:G1:FR1 light treatment with higher stress modulated substances and lower physiological traits. CBDA was also accumulated higher in R8:B2 and R7:B2:G1 light treatments with less evidence of stress modulated substances. Besides, Greenlight influenced in CBD and CBDA synthesis where FR and UV-A (along with green) play a positive and negative role in this process, respectively. These results indicate that the role of THCA as a stress marker is more decisive in hemp plant than other cannabinoids under attributed light-mediated stress.

show abstract

Effect of different light intensity on physiology, antioxidant capacity and photosynthetic characteristics on wheat seedlings under high CO2 concentration in a closed artificial ecosystem

Cited by 24 publications

References 77 publications

Cannabinoids Accumulation in Hemp (Cannabis sativa L.) Plants under LED Light Spectra and Their Discrete Role as a Stress Marker

Cannabinoids Accumulation in Hemp (Cannabis sativa L.) Plants under LED Light Spectra and Their Discrete Role as a Stress Marker

Low Light Alters the Photosynthesis Process in Cigar Tobacco via Modulation of the Chlorophyll Content, Chlorophyll Fluorescence, and Gene Expression

Cannabinoids accumulation in hemp (Cannabis sativa L) plants under LED light spectra and their discrete role as a stress marker

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