Photosynthetic changes in Cymbidium orchids grown under different intensities of night interruption lighting

Kim, Tae Young; Yu, Duk Jun; Rho, Hyun Soo; Runkle, Erik S.; Lee, Hee Jae; Kim, Ki Sun

doi:10.1016/j.scienta.2015.01.036

Cited by 14 publications

(7 citation statements)

References 23 publications

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“…The PSII as the heart of the photosynthetic process is highly sensitive to the environmental stresses. Its activity could be determined with one non-invasive time-resolved fluorescence measurement, which could measure the polyphasic rise with the basic steps of OJIP [43,[48][49][50][51][52][53][54]. Several studies have shown that the chlorophyll a transient has become one of the most popular tools to estimate stress-induced changes in photosynthetic performance.…”

Section: Discussionmentioning

confidence: 99%

“…Circadian clock synchronization to daily cyclic environmental signals temporally regulates many aspects of plant growth and development [62], and is crucial for plant fitness, adaptation, and survival [63]. Although the photosynthetic capacity triggered by artificial night lighting is well-documented [25,51], the dynamics of the day/night with artificial lighting cycle need further studies. The increase in photosynthetic rates under continuous light was well reflected by the observed trends [11].…”

Section: Discussionmentioning

confidence: 99%

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Night Light-Adaptation Strategies for Photosynthetic Apparatus in Yellow-Poplar (Liriodendron tulipifera L.) Exposed to Artificial Night Lighting

Kwak

Cheng

et al. 2018

Forests

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Abstract:Plants can undergo external fluctuations in the natural light and dark cycle. The photosynthetic apparatus needs to operate in an appropriate manner to fluctuating environmental factors, especially in light. Yellow-poplar seedlings were exposed to nighttime artificial high-pressure sodium (HPS) lighting to evaluate night light-adaptation strategies for photosynthetic apparatus fitness relative to pigment contents, photosystem II photochemistry, photosynthetic parameters, histochemical analysis of reactive oxygen species, and plant biomass. As a result, seedlings exhibited dynamic changes including the enhancement of accessory pigments, the reduction of photosystem II photochemistry, increased stomatal limitation, downregulation of photosynthesis, and the decreased aboveground and belowground biomass under artificial night lighting. Histochemical analysis with 3,3 -diaminobenzidine (DAB) and nitroblue tetrazolium (NBT) staining indicates the accumulation of in situ superoxide radicals (O 2 − ) and hydrogen peroxide (H 2 O 2 ) in leaves exposed to the lowest level of artificial night lighting compared to control. Moreover, these leaves exposed to artificial night lighting had a lower nighttime respiration rate. These results indicated that HPS lighting during the night may act as a major factor as repressors of the fitness of photosynthesis and growth patterns, via a modification of the photosynthetic light harvesting apparatus.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Night Light-Adaptation Strategies for Photosynthetic Apparatus in Yellow-Poplar (Liriodendron tulipifera L.) Exposed to Artificial Night Lighting

Kwak

Cheng

et al. 2018

Forests

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“…Although a relatively high light intensity can increase photosynthesis during that interruption, the photosynthesis rate and PSII activity in those plants during the daytime may decline due to a leaf-nitrogen deficiency. Therefore, night interruption accompanied by additional fertilization is recommended (Kim et al., 2015).…”

Section: Light Requirement and Adaption In Orchidsmentioning

confidence: 99%

Physiological diversity of orchids

et al. 2018

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The Orchidaceae is a diverse and wide spread family of flowering plants that are of great value in ornamental, medical, conservation, and evolutionary research. The broad diversity in morphology, growth form, life history, and habitat mean that the members of Orchidaceae exhibit various physiological properties. Epiphytic orchids are often characterized by succulent leaves with thick cell walls, cuticles, and sunken stomata, whereas terrestrial orchids possess rhizomes, corms, or tubers. Most orchids have a long juvenile period, slow growth rate, and low photosynthetic capacity. This reduced photosynthetic potential can be largely explained by CO2 diffusional conductance and leaf internal structure. The amount of light required for plant survival depends upon nutritional mode, growth form, and habitat. Most orchids can adapt to their light environments through morphological and physiological adjustments but are sensitive to sudden changes in irradiance. Orchids that originate from warm regions are susceptible to chilling temperatures, whereas alpine members are vulnerable to high temperatures. For epiphytic orchids, rapid water uptake by the velamen radicum, water storage in their pseudobulbs and leaves, slow water loss, and Crassulacean Acid Metabolism contribute to plant-water balance and tolerance to drought stress. The presence of the velamen radicum and mycorrhizal fungi may compensate for the lack of root hairs, helping with quick absorbance of nutrients from the atmosphere. Under cultivation conditions, the form and concentration of nitrogen affect orchid growth and flowering. However, the limitations of nitrogen and phosphorous on epiphytic orchids in the wild, which require these plants to depend on mycorrhizal fungi for nutrients throughout the entire life cycle, are not clearly understood. Because they lack endosperm, seed germination depends upon obtaining nutrients via mycorrhizal fungi. Adult plants of some autotrophic orchids also gain carbon, nitrogen, phosphorus, and other elements from their mycorrhizal partners. Future studies should examine the mechanisms that determine slow growth and flower induction, the physiological causes of variations in flowering behavior and floral lifespan, the effects of nutrients and atmospheric-nitrogen deposition, and practical applications of mycorrhizal fungi in orchid cultivation.

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“…The difference of the LCP and LSP is the result of long-term adaptation to the environmental conditions under which the plants grew. Kim et al [20] researched photosynthetic change in Cymbidium orchids grown under intensities of night interruption lighting. The results showed that photosynthetic photon flux of 120 μmol m −2 s −1 was effective for Cymbidium orchids.…”

Section: Discussionmentioning

confidence: 99%

The Photosynthetic Characteristics of Wild Cymbidium faberi in the Qinling Mountains of Central China

Song¹,

Zhang²

2020

Horticultural Crops

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The large flowers of orchids make them popular as cultivated plants. Seven species of orchids in the genus Cymbidium (Orchidaceae) have been crossbred to create more than 220 hybrids that serve as popular cultivated ornamentals. The present study examined the daily variation in the patterns of the net photosynthetic rate and the photosynthetic response of wild Cymbidium faberi in the Qinling Mountains in northwestern China. The photosynthetic characteristics of this species were studied under natural conditions with a portable photosynthesis system. Double peaks were observed in the net photosynthetic rate with one around 09:00 and another around 17:00 in spring, as well as one around 11:00 and another around 15:00 in winter. Midday depression of photosynthesis was observed in wild C. faberi plants around 13:00 in both spring and winter. The net photosynthetic rate was strongly positively correlated with both stomatal conductance (R = 0.913) and the transpiration rate (R = 0.659) and weakly negatively correlated with the intercellular carbon dioxide concentration (R = −0.094). The results show that the light compensation point (LCP) and the light saturation point (LSP) of wild C. faberi were 25.78 and 384 μmol m −2 s −1 , respectively. The result provides reference for cultivation management especially in light management of Cymbidium.

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Photosynthetic changes in Cymbidium orchids grown under different intensities of night interruption lighting

Cited by 14 publications

References 23 publications

Night Light-Adaptation Strategies for Photosynthetic Apparatus in Yellow-Poplar (Liriodendron tulipifera L.) Exposed to Artificial Night Lighting

Night Light-Adaptation Strategies for Photosynthetic Apparatus in Yellow-Poplar (Liriodendron tulipifera L.) Exposed to Artificial Night Lighting

Physiological diversity of orchids

The Photosynthetic Characteristics of Wild Cymbidium faberi in the Qinling Mountains of Central China

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