Aspects of Co2 Uptake in the Crassulacean Acid Metabolism Orchid Phalaenopsis

Ichihashi, Syoichi; Higuchi, Toshihiko; Shibayama, H.; Tesima, Y.; Nishiwaki, Yoshie; Ota, Keisuke

doi:10.17660/actahortic.2008.766.33

Cited by 7 publications

(10 citation statements)

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“…1). These findings are also consistent with Ota et al (1991), Lootens and Heursel (1998), Chen et al (2008) and Ichihashi et al (2008) who demonstrated for Phalaenopsis that net CO 2 uptake was maximal when grown at day temperatures of 21°C to 28°C and night temperatures of 18°C to 22°C. Nevertheless, nocturnal CO 2 uptake of DIF 7 and DIF 12 plants tended to be lower after 3 to 5 days compared to the nocturnal CO 2 uptake of DIF 1.5 and DIF 3 plants.…”

Section: Discussionsupporting

confidence: 91%

“…Reducing irradiance levels to 90 µmol PAR m -2 s -1 led to a leaf net CO 2 -exchange rate of 2.3 µmol m -2 s -1 (Chen et al 2008). However, in our study absolute CO 2 -exchange rates of Phalaenopsis 'Hercules' were substantially lower due to the relatively high nighttime vapour-pressure deficits (up to 1.7 kPa), which in agreement with Ichihashi et al (2008) probably forced the stomata to close.…”

Section: Discussionsupporting

confidence: 44%

“…Subsequently, it was claimed that cool night temperatures (15-20°C) and temperature differences between day and night were both required for maximum nocturnal malic acid accumulation in CAM plants (Buchanan-Bollig and Kluge 1981, Buchanan-Bollig et al 1984, Carter et al 1995, Nimmo 2000. Indeed, several authors recommended an optimal night temperature of 18-22°C and day temperatures between 21°C and 28°C for net CO 2 uptake of Phalaenopsis (Ota et al 1991, Chen et al 2008, Ichihashi et al 2008.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal variation of photosynthesis and photosynthetic efficiency in Phalaenopsis

Pollet¹,

Steppe²,

Dambre³

et al. 2010

Photosynt.

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Nowadays, a quest for efficient greenhouse heating strategies, and its related effects on the plant’s performance, exists. In this study, the effects of a combination of warm days and cool nights in autumn and spring on the photosynthetic activity and efficiency of Phalaenopsis were evaluated; the latter, being poorly characterised in CAM plants and, to our knowledge, not reported before in Phalaenopsis. 24-h CO2 flux measurements and chlorophyll fluorescence analysis were performed in both seasons on Phalaenopsis ‘Hercules’ exposed to relatively constant temperature regimes, 25.5/24.0°C (autumn) and 30/27°C (spring) respectively, and distinctive warm day/cool night temperature regimes, 27/20°C (autumn) and 36/24°C (spring), respectively. Cumulated leaf net CO2 uptake of the distinctive warm day/cool night temperature regimes declined with 10-16% as compared to the more constant temperature regimes, while the efficiency of carbon fixation revealed no substantial differences in both seasons. Nevertheless, a distinctive warm day/cool night temperature regime seemed to induce photorespiration. Although photorespiration is expected not to occur in CAM, the suppression of the leaf net CO2 exchange during Phase II and Phase IV as well as the slightly lower efficiency of carbon fixation for the distinctive warm day/cool night temperature regimes confirms the involvement of photorespiration in CAM. A seasonal effect was reflected in the leaf net CO2 exchange rate with considerably higher rates in spring. In addition, sufficiently high PAR levels in spring led to an efficiency of carbon fixation of 1.06-1.27% which is about twice as high than in autumn. As a result, only in the case where a net energy reduction between the temperature regimes compensates for the reduction in net CO2 uptake, warm day/cool night temperature regimes may be recommended as a practical sustainable alternative

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 44%

Section: Introductionmentioning

confidence: 99%

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Seasonal variation of photosynthesis and photosynthetic efficiency in Phalaenopsis

Pollet¹,

Steppe²,

Dambre³

et al. 2010

Photosynt.

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“…Temperature is the key factor affecting vegetative growth in Phalaenopsis (Guo and Lee, 2006;Ichihashi et al, 2006;Paradiso et al, 2012). Young plants of crassulacean acid metabolism(CAM) orchid including Phalaenopsis and Doritaenopsis(Phalaenopsis x Doritis) require a relatively high temperature(>25 o C) for increase of growth rate (Lee, 1991;Lin and Lee, 1988;Pollet et al, 2011a;Wang, 2005).…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…Photosynthesis is an important physiological process for growth of all green plants (Taiz and Zeiger, 2006). Photosynthetic ability of CAM plants can be estimated by measuring CO 2 uptake rate (Ichihashi et al, 2006;Jeon et al, 2006;Pimienta-Barrios, 2001;Pollet et al, 2011a, b;Winter and Holtum, 2002). In CAM plants, the diurnal net CO 2 uptake pattern is divided into four phases (Osmond et al, 1999;Borland et al, 2000).…”

Section: ⅰ Introductionmentioning

confidence: 99%

Effect of Low Temperature and Plant Age on Growth and Photosynthesis of <em>Phalaenopsis</em> ‘Hwasu 3551’ and ‘White-Red Lip’ during Vegetative Stage

Hong¹,

Kim²

2014

J. Korean Soc. People Plants Environ.

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This study was conducted to examine the low temperature effects on photosynthesis of two Phalaenopsis hybrids 'Hwasu 3551'(HS) and 'White-Red Lip'(WR) at different plant age. Micropropagated clones were acclimated for 4 weeks. After acclimation, plants were grown in a growth chamber at 28/26 o C(HT). Plants were transferred to 21/19 o C(LT) after 0, 2, and 4 months of cultivation at HT, and plant age was 1, 3, and 5 month-old, respectively. The photoperiod was provided by 12 hours with PPF at 110±10μmol•m-2 •s-1 (06:00-18:00 HR). Vegetative growth and diurnal CO2 uptake rate of plants maintained at HT or transferred to LT were measured and compared each other. With all conditions, two Phalaenopsis hybrids showed CAM pathway, which was divided into Phase I to IV by CO2 exchange. When plants were transferred to LT, daily total net CO2 uptake and growth rate decreased. In 3 month-old plants transferred to LT, CO2 uptake rate during phase III decreased to-1.36 and-0.60μmol•m-2 •s-1 in HS and WR(CO2 leakage), respectively. CO2 leakage during Phase III induced significant decrease of daytime total net CO2 uptake, and vegetative growth rate decreased. In addition, when 3 month-old plants were transferred to LT, the number of new leaves significantly decreased. However, when 5 month-old plants were transferred to LT, decrease of number of new leaves were not observed and only leaf length decreased. These results indicated that low temperature effect on vegetative growth and photosynthesis were small in 5 month-old plant, and vegetative growth was maintained. This approach could be helpful for establishing schedule or improving strategy in Phalaenopsis cultivation with energy cost saving.

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Low night temperature acclimation of Phalaenopsis

et al. 2011

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The capability of Phalaenopsis to acclimate its photosynthetic capacity and metabolic activity to cool night temperature conditions is crucial for improving orchid production in terms of efficient greenhouse heating. The extent to which Phalaenopsis possesses acclimation potential and the mechanistic background of the metabolic processes involved, have, however, not been studied before. Plants were subjected to a direct and gradual shift from a day to night temperature regime of 28/28-28/16°C, the cold stress and cold acclimation treatment, respectively. In comparison with the cold stress treatment, the cold acclimation treatment led to a higher malate accumulation and a reduction in leaf net CO(2) uptake. Consistently, the contribution of respiratory CO(2) recycling to nocturnal malate synthesis was calculated to be 23.5 and 47.0% for the cold stress and cold acclimation treatment, respectively. Moreover, the lower levels of starch measured in the cold acclimated leaves confirmed the suggested enhanced respiratory CO(2) recycling, implying that Phalaenopsis CAM operation evolved towards CAM idling. It is, however, plausible that this adjustment was not an effect of the low night temperature per se but a consequence of cool-root induced drought stress. Apart from that, at the start of the photoperiod, membrane stability showed a depression which was directly counteracted by an increased generation of glucose, fructose and sucrose. From these observations, it can be concluded that the observed plasticity in CAM operation and metabolic flexibility may be recognized as important steps in the low night temperature acclimation of Phalaenopsis.

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Aspects of Co2 Uptake in the Crassulacean Acid Metabolism Orchid Phalaenopsis

Cited by 7 publications

References 0 publications

Seasonal variation of photosynthesis and photosynthetic efficiency in Phalaenopsis

Seasonal variation of photosynthesis and photosynthetic efficiency in Phalaenopsis

Effect of Low Temperature and Plant Age on Growth and Photosynthesis of <em>Phalaenopsis</em> ‘Hwasu 3551’ and ‘White-Red Lip’ during Vegetative Stage

Low night temperature acclimation of Phalaenopsis

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