Novel technique for component monitoring of CO2 exchange in plants

Balaur, Nicolae; Воронцов, В. А.; Kleiman, E. I.; Ton, Yu. D.

doi:10.1134/s1021443709030170

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…The leaf CO 2 exchange rate was monitored for 2 days simultaneously for two leaves and two treatments using a PTM-48A Photosynthesis Monitor (Phyto-sensor Group, Chisinau, Moldova) with self-clamping leaf chambers (Balaur et al, 2009). The photosynthesis of the low-positioned leaves, located between the top and bottom lamps, was determined from four independent measurements, so the mean photosynthesis values were based on independent measurements of eight individual leaves for every treatment.…”

Section: Photosynthesismentioning

confidence: 99%

Supplemental Light-Emitting Diode Inter-Lighting Increases Tomato Fruit Growth Through Enhanced Photosynthetic Light Use Efficiency and Modulated Root Activity

et al. 2020

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We investigated the effect of supplemental LED inter-lighting (80% red, 20% blue; 70 W m −2 ; light period 04:00-22:00) on the productivity and physiological traits of tomato plants (Flavance F1) grown in an industrial greenhouse with high pressure sodium (HPS) lamps (235 W m −2 , 420 µmol m −2 s −1 at canopy). Physiological trait measurements included diurnal photosynthesis and fruit relative growth rates, fruit weight at specific positions in the truss, root pressure, xylem sap hormone and ion compositions, and fruit quality. In the control treatment with HPS lamps alone, the ratio of far-red to red light (FR:R) was 1.2 at the top of the canopy and increased to 5.4 at the bottom. The supplemental LED interlighting decreased the FR:R ratio at the middle and low positions in the canopy and was associated with greener leaves and higher photosynthetic light use efficiency (PLUE) in the leaves in the lower canopy. The use of LED inter-lighting increased the biomass and yield by increasing the fruit weight and enhancing plant growth. The PLUE of plants receiving supplemental LED light decreased at the end of the light period, indicating that photosynthesis of the supplemented plants at the end of the day might be limited by sink capacity. The supplemental LED lighting increased the size of fruits in the middle and distal positions of the truss, resulting in a more even size for each fruit in the truss. Diurnal analysis of fruit growth showed that fruits grew more quickly during the night on the plants receiving LED light than on unsupplemented control plants. This faster fruit growth during the night was related to an increased root pressure. The LED treatment also increased the xylem levels of the phytohormone jasmonate. Supplemental LED inter-lighting increased tomato fruit weight without affecting the total soluble solid contents in fruits by increasing the total assimilates available for fruit growth and by enhancing root activity through an increase in root pressure and water supply to support fruit growth during the night.

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Section: Photosynthesismentioning

confidence: 99%

Supplemental Light-Emitting Diode Inter-Lighting Increases Tomato Fruit Growth Through Enhanced Photosynthetic Light Use Efficiency and Modulated Root Activity

et al. 2020

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“…The intensity of CO 2 -gas exchange of leaves was determined with 3-fold repetition on well-developed intact leaves of the upper part of the shoot with an interval of 15-20 minutes. An automatic 4-channel open-type system for monitoring CO 2 gas exchange and leaf transpiration " РТМ-48A photosynthesis monitor" (Bioinstruments S.R.L., Moldova) was used for measurements [27]. The measurements were carried out at a natural CO 2 concentration in the air of about 0.04 %.…”

Section: Methodsmentioning

confidence: 99%

Influence of abiotic factors on CO₂-gas exchange of Pinus pallasiana, Juniperus excelsa and Arbutus andrachne

et al. 2020

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The complex interactions among environmental factors as incident light, temperature and soil water content create the need for used physiology-based models which describe plants performance under current and changing climatic conditions. In the present work the net photosynthetic rate of Pinus pallasiana D. Don, Juniperus excelsa M.Bieb. and Arbutus andrachne L. was modeled as a function of light irradiance using the modified rectangular hyperbola model, which is capable of describing the photoinhibition by the non-rectangular hyperbola function. A comparative assessment of the adaptive response of the photosynthetic apparatus plants on the effect of abiotic factors and their strategies in maintaining an optimal water balance in accordance with environmental conditions has been performed. The parameters of light curves of photosynthesis under conditions of full sunlight, moderate shading and drought are determined. In relation to light, Pinus pallasiana is characterized by wider ecological amplitude compared to Juniperus excelsa and Arbutus andrachne. Inefficient use of low-intensity of photosynthetically active radiation by immature plants Pinus pallasiana and Juniperus excelsa indicates poor shade tolerance and inability to resume in shade-type forests. Due to the low plasticity to changes in the light regime, Arbutus andrachne L. may experience a significant lack of light in strong shading. Arbutus andrachne has the highest ability to actively rearrange water regime in accordance with its external moisture supply, which causes the highest drought resistance, and Juniperus excelsa has a slightly lower capacity. Tolerance to hydrothermal stress in Pinus pallasiana is significantly lower than in Arbutus andrachne and Juniperus excelsa.

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Light regulation of mitochondrial alternative oxidase pathway during greening of etiolated wheat seedlings

Гармаш

Grabelnych

Velegzhaninov

et al. 2015

Journal of Plant Physiology

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Novel technique for component monitoring of CO2 exchange in plants

Cited by 10 publications

References 3 publications

Supplemental Light-Emitting Diode Inter-Lighting Increases Tomato Fruit Growth Through Enhanced Photosynthetic Light Use Efficiency and Modulated Root Activity

Supplemental Light-Emitting Diode Inter-Lighting Increases Tomato Fruit Growth Through Enhanced Photosynthetic Light Use Efficiency and Modulated Root Activity

Influence of abiotic factors on CO₂-gas exchange of Pinus pallasiana, Juniperus excelsa and Arbutus andrachne

Light regulation of mitochondrial alternative oxidase pathway during greening of etiolated wheat seedlings

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Novel technique for component monitoring of CO2 exchange in plants

Cited by 10 publications

References 3 publications

Supplemental Light-Emitting Diode Inter-Lighting Increases Tomato Fruit Growth Through Enhanced Photosynthetic Light Use Efficiency and Modulated Root Activity

Supplemental Light-Emitting Diode Inter-Lighting Increases Tomato Fruit Growth Through Enhanced Photosynthetic Light Use Efficiency and Modulated Root Activity

Influence of abiotic factors on CO2-gas exchange of Pinus pallasiana, Juniperus excelsa and Arbutus andrachne

Light regulation of mitochondrial alternative oxidase pathway during greening of etiolated wheat seedlings

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Influence of abiotic factors on CO₂-gas exchange of Pinus pallasiana, Juniperus excelsa and Arbutus andrachne