CO2 Enrichment with Higher Light Level Improves Flowering Quality of Phalaenopsis Queen Beer ‘Mantefon’

Cho, Ah Ram; Song, Su Jung; Chung, Seunghwan; Kim, Yoon Jin

doi:10.1016/j.scienta.2018.12.030

Cited by 9 publications

(11 citation statements)

References 20 publications

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“…In our previous study, phalaenopsis exposed to an elevated CO2 level of 800 µmol•mol -1 had increased biomass production (Kim et al, 2017). Elevated CO 2 levels of either 800 or 1,200 µmol•mol -1 increased flower production in a shortened flowering time in phalaenopsis (Cho et al, 2019). However, even low concentrations of 450 -600 µmol•mol -1 increased plant growth and flower production in various C3 and C4 species (Zangerl and Bazzaz, 1984).…”

Section: Introductionmentioning

confidence: 82%

“…The genus Phalaenopsis is one of the major global floricultural crops, with the top commercial orchid representing 63.9% of the potted orchid trade (KAFFTC, 2016;Cho et al, 2019). Phalaenopsis is in high demand and is the top exported flower, accounting for more than 50% of the total floral Flowering and Photosynthetic Responses of Phalaenopsis under Elevated CO2 and Nutrient Supply market in Thailand (Hsiao et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Flowering and Photosynthetic Responses of Phalaenopsis under Elevated CO2 and Nutrient Supply

Cho,

Choi,

Kim

2020

HST

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The demand for phalaenopsis has been increasing in areas including Thailand, Japan, and the United States. Increasing atmospheric CO2 during the night improves the productivity and quality of phalaenopsis flowers. Because nutrient requirements change under conditions of elevated CO2, the interactive effects of CO 2 enrichment and nutrient supply require particular attention. Our study aimed to discover the effect of nutrient treatments on phalaenopsis using electrical conductivity (EC) when applying CO2 in the greenhouse. We investigated the flowering and photosynthetic responses of Phalaenopsis Queen Beer 'Mantefon' and 'Jupiter' in response to EC-based nutrients supplied with 1.0 (control) and 2.0 dS•m -1 and two levels of ambient and elevated CO2 (≈ 650 µmol•mol -1 CO2) for a period of 21 weeks of treatment (WOT). A longer first flower spike was produced in the plants exposed to EC 2.0 dS•m -1 than in those exposed to EC 1.0 dS•m -1 under elevated CO2, regardless of the phalaenopsis cultivar. Responses to CO2 and EC in the second flower spike length varied among phalaenopsis cultivars during 0 to 18 WOT; however, maximum second spike length was obtained with EC 2.0 dS•m -1 under elevated CO 2 at 21 WOT in 'Jupiter'. More visible flower buds and lateral branches were observed in plants exposed to EC 2.0 dS•m -1 under elevated CO2. The net CO2 assimilation rate showed significance with CO2 treatment, regardless of phalaenopsis cultivar. The most flowers were produced in the plants exposed to EC 2.0 dS•m -1 under ambient CO2 in both phalaenopsis cultivars, but water use efficiency, as well as potential yield, were the highest in plants exposed to EC 2.0 dS•m -1 under elevated CO2. We conclude that ≈ 650 µmol•mol -1 CO 2 increased the flowering quality of phalaenopsis and recommend adjusting the nutrient concentration with an EC of 2.0 dS•m -1.

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Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Flowering and Photosynthetic Responses of Phalaenopsis under Elevated CO2 and Nutrient Supply

Cho,

Choi,

Kim

2020

HST

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“…According to Lin and Tsu (2004) [17], the threshold light level for photosynthesis and starch accumulation in Phalaenopsis amabilis (L.) Blume was < 200 µmol•m −2 •s −1 . Only the plants were flowered when they were grown at 260 ± 40 µmol•m −2 •s −1 compared to that grown at 90 ± 10 µmol•m −2 •s −1 under CO 2 of 800 µmol•mol −1 conditions in Phalaenopsis Queen Beer 'Mantefon' [20]. In the present study, leaf emergence is fastened in the plants grown at 300 ± 20 µmol•m −2 •s −1 along with 800 µmol•mol −1 CO 2 compared to that grown at 150 ± 20 µmol•m −2 •s −1 , regardless of CAN level (Figure 1b).…”

Section: Discussionmentioning

confidence: 99%

“…Similarly, the combined effect improved seedling growth and yield of chrysanthemum [19]. Cho et al (2019) [20] observed more floral buds and flowers in Phalaenopsis Queen Beer 'Mantefon' when plants were grown under a light level of 260 ± 40 µmol•m −2 •s −1 and 800 µmol•mol −1 CO 2 than when they were grown under 400 µmol•mol −1 CO 2 .…”

Section: Introductionmentioning

confidence: 89%

Shortening the Vegetative Growth Stage of Phalaenopsis Queen Beer ‘Mantefon’ by Controlling Light with Calcium Ammonium Nitrate Levels under Enriched CO2

2022

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The vegetative growth, photosynthetic, and stomatal characteristics were investigated in Phalaenopsis Queen Beer ‘Mantefon’ to determine light’s influence with calcium ammonium nitrate (CAN) levels under 800 μmol·mol−1 CO2. Two lights (150 ± 20 and 300 ± 20 μmol·m−2·s−1) and CAN levels were employed for 40 weeks: calcium, ammonium, and nitrate levels by 0.90, 0.55, and 2.97 mmol·L−1 (CAN1), 8.63, 1.11, and 6.05 mmol·L−1 (CAN2), 12.80, 1.72, and 9.13 mmol·L−1 (CAN3), and 18.80, 2.27, and 12.20 mmol·L−1 (CAN4), respectively. The number of leaves increased in the plants grown at 300 ± 20 μmol·m−2·s−1 with CAN1 compared to control. Plants grown at 300 ± 20 μmol·m−2·s−1 with CAN4 had the lowest number of leaves among all plants. The time to the mature leaf span decreased in the plants grown at 300 ± 20 μmol·m−2·s−1 with CAN1. The net CO2 uptake was higher in the plants grown at 300 ± 20 μmol·m−2·s−1 than those grown at 150 ± 20 μmol·m−2·s−1 with CAN1–3 conditions. The water-use efficiency is higher in the plants grown with CAN1 than those with CAN2–4 at 300 ± 20 μmol·m−2·s−1. The maximum stomatal aperture was the largest in the plants grown at 300 ± 20 μmol·m−2·s−1 with CAN1–2 among all plants. Consequently, light levels of 300 ± 20 μmol·m−2·s−1 in Phalaenopsis Queen Beer ‘Mantefon’ must be accompanied by nutrient CAN1 to improve photosynthesis and stomatal activity and promote leaf growth under 800 μmol·mol−1 CO2 conditions.

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“…Nonetheless, photosynthate accumulation varies with CO 2 levels, exposure time, and temperature. Short-term CO 2 exposure (few days) increases the photosynthetic rate, whereas the massive photosynthate accumulation under long-term CO 2 enrichment (few weeks to months) results from the negative feedback on photosynthesis, which decreases the photosynthetic rate and acclimation [15][16][17]. Furthermore, eCO 2 improves C assimilation rates in the leaf, which further increases photosynthetic acclimation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Elevated CO2 Levels on the Growth and Yield of Summer-Grown Cucumbers Cultivated under Different Day and Night Temperatures

Namizaki¹,

Iwasaki

Wang

2022

Agronomy

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The effects of elevated CO2 (eCO2) levels on field-grown cucumbers have been extensively studied. However, the variations in photosynthate accumulation in summer-grown cucumbers simultaneously exposed to eCO2 and varying day-night temperatures (DNF) still remain unexplored. This study aimed to investigate the effects of DNF different CO2 conditions [ambient CO2 (aCO2; 400–600 μmol mol−1) and eCO2 (800–1000 μmol mol−1)] on dry matter production and dry matter distribution in summer-grown cucumbers under two DNF treatments (35/10 °C and 25/20 °C, day/night). We observed that long-term eCO2 exposure increased C assimilation and photosynthate accumulation in leaves, resulting in feedback inhibition of the leaf area. Under both DNF treatments, the total dry matter distribution to fruits under eCO2 conditions was approximately 15% higher than that under aCO2 conditions. Furthermore, soluble sugar content and C:N ratio increased with long-term eCO2 exposure, indicating increased C allocation, photosynthate accumulation, and distribution. However, low night temperatures (LT) inhibited respiration and increased dry matter accumulation by 30% under eCO2 conditions. Additionally, eCO2 increased fruit fresh weight by 8% and 12% under both DNF treatments compared to aCO2. This suggests that long-term eCO2 exposure and varying DNF exhibited different effects through different metabolic mechanisms on cucumber growth at high temperatures. eCO2 conditions probably increased dry matter distribution to improve fruit quality, and LT treatment altered the respiration rate to restore photosynthesis, thereby increasing photosynthate distribution to fruits. Therefore, a combination of CO2 enrichment and DNF can be used to improve fruit quality and yield at high temperatures.

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CO2 Enrichment with Higher Light Level Improves Flowering Quality of Phalaenopsis Queen Beer ‘Mantefon’

Cited by 9 publications

References 20 publications

Flowering and Photosynthetic Responses of Phalaenopsis under Elevated CO2 and Nutrient Supply

Flowering and Photosynthetic Responses of Phalaenopsis under Elevated CO2 and Nutrient Supply

Shortening the Vegetative Growth Stage of Phalaenopsis Queen Beer ‘Mantefon’ by Controlling Light with Calcium Ammonium Nitrate Levels under Enriched CO2

Effects of Elevated CO2 Levels on the Growth and Yield of Summer-Grown Cucumbers Cultivated under Different Day and Night Temperatures

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