CO2 Uptake Behavior and Vegetative Growth of Doritaenopsis Queen Beer‘Mantefon’Orchids as Influenced by Light/Dark Cycle Manipulation

Kim, Hyo Jin; Lee, Ju Hui; Lee, Hyo Beom; An, Seong Kwang; Kim, Ki Sun

doi:10.11623/frj.2017.25.4.10

Cited by 2 publications

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“…Studies on the effects of D. ekapol showed that short light period increased the net CO 2 absorption of phase I (dark period), while long light period increased the net CO 2 absorption of phase II (early stage of light period) and phase IV (at the end of light period) (Sekizuka et al., 1995). The CAM pathway and CO 2 uptake of Doritaenopsis Queen Beer “Mantefon” can both be restrained by short light/dark cycle (Kim et al., 2017). Under the normal 12/12 h light/dark cycle, CAM and C3 pathways coexist in D. officinale , whereas C3 pathway can be upregulated by short light/dark cycle (short light period and short dark period), especially extreme treatment of 4/4 h light/dark cycle can lead to C3-like light-only CO 2 uptake pattern (Zhang et al., 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of Light/Dark Cycle on Photosynthetic Pathway Switching and CO2 Absorption in Two Dendrobium Species

Cheng

et al. 2019

Front. Plant Sci.

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Many Dendrobium species are both ornamental and medicinal plants in China. Several wild species have been exploited to near extinction, and facility cultivation has become an important way to meet the great market demand. Most Dendrobium species have evolved into crassulacean acid metabolism (CAM) pathways in adapting to harsh epiphytic environment, leading to low daily net CO 2 absorption. Photosynthetic pathways of many facultative CAM plants are regulated by various environmental factors. Light/dark cycle plays an important role in regulating the photosynthetic pathway of several CAM species. The aims of this study were to investigate whether the photosynthetic pathway of Dendrobium species could be regulated between C3 and CAM by changing light/dark cycles and the daily net CO 2 absorption could be enhanced by shortening light/dark cycle. In this study, net CO 2 exchange rates of D. officinale and D. primulinum were monitored continuously during two different light/dark cycles conversion compared to Kalanchoe daigremontiana as an obligate CAM plant. The net CO 2 exchange pattern and stomatal behavior of D. officinale and D. primulinum were switched from CAM to C3-like by changing the light/dark cycle from 12/12 h to 4/4 h. However, this switching was not completely reversible. Compared to the original 12/12 h light/dark cycle, the dark, light, and daily net CO 2 exchange amount of D. officinale were significantly increased after the light/dark cycle was changed from 4/4 h to 12/12 h, but those in D. primulinum was opposite and those in K. daigremontiana was not affected. Daily net CO 2 exchange amount of D. officinale increased by 47% after the light/dark cycle was changed from 12/12 h to 4/4 h, due to the sharp increase of light net CO 2 exchange amount. However, the large decrease of dark net CO 2 exchange amount could not be offset by increased light net CO 2 exchange amount, leading to reduced daily net CO 2 exchange amount of D. primulinum . In conclusion, the 4/4 h light/dark cycle can induce the photosynthetic pathway of D. officinale and D. primulinum to C3-like, and improve the daily CO 2 absorption of D. officinale .

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Section: Introductionmentioning

confidence: 99%

Effect of Light/Dark Cycle on Photosynthetic Pathway Switching and CO2 Absorption in Two Dendrobium Species

Cheng

et al. 2019

Front. Plant Sci.

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“…Studies on D. ekapol showed that short light period increases net CO 2 absorption in dark period, while long light period increases net CO 2 absorption at early and end of light period [9] . The photosynthetic pathway and CO 2 uptake of Doritaenopsis Queen Beer "Mantefon" can also be affected by light/dark cycle [10] . D. officinale as a facultative CAM plant usually has a photosynthetic pathway of coexistence of C3 and CAM under natural conditions [1,11] .…”

Section: Introductionmentioning

confidence: 99%

Effects of short light/dark cycles on photosynthetic pathway switching and growth of medicinal Dendrobium officinale in aeroponic cultivation

Cheng¹,

He²,

He³

et al. 2019

International Journal of Agricultural and Biological Engineering

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Dendrobium officinale has high medicinal value but grows slowly in natural environment due to its special CAM photosynthetic pathway. In this study, D. officinale were grown aeroponically with light/dark cycles of 12 h/12 h, 4 h/4 h, and 2 h/2 h for 150 d. The photosynthetic electron transfer characteristics, photosynthetic CO 2 fixation pathways, and accumulations of biomass and soluble polysaccharides in D. officinale leaves were studied. The results showed that the photosynthetic apparatus states of D. officinale in aeroponic cultivation under short light/dark cycles of 4 h/4 h and 2 h/2 h were better than that under 12 h/12 h. The dark net CO 2 exchange percentages of D. officinale were negative in short light/dark cycles of 4 h/4 h and 2 h/2 h, and the daily net CO 2 exchange amount and dry/fresh weight increases were doubled compared with those in 12 h/12 h light/dark cycle. High soluble polysaccharides content and the soluble polysaccharides yield of D. officinale were obtained in the shorter light/dark cycle of 2 h/2 h. Therefore, the photosynthetic pathway of D. officinale could be switched from CAM to C3 by short light/dark cycles of 4 h/4 h and 2 h/2 h, and its higher biomass accumulation and soluble polysaccharides yield could be obtained by the shorter light/dark cycle of 2 h/2 h in aeroponic cultivation.

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CO2 Uptake Behavior and Vegetative Growth of Doritaenopsis Queen Beer‘Mantefon’Orchids as Influenced by Light/Dark Cycle Manipulation

Cited by 2 publications

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Effect of Light/Dark Cycle on Photosynthetic Pathway Switching and CO2 Absorption in Two Dendrobium Species

Effect of Light/Dark Cycle on Photosynthetic Pathway Switching and CO2 Absorption in Two Dendrobium Species

Effects of short light/dark cycles on photosynthetic pathway switching and growth of medicinal Dendrobium officinale in aeroponic cultivation

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