scholarly journals G protein γ subunit qPE9-1 is involved in rice adaptation under elevated CO2 concentration by regulating leaf photosynthesis

Rice ◽  
2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Ke Wang ◽  
Feiyun Xu ◽  
Wei Yuan ◽  
Leyun Sun ◽  
Shaoxian Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
G Protein ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Leaf Photosynthesis ◽  
Light Reaction ◽  
Relative Expression ◽  
Rice Growth ◽  
Γ Subunit ◽  
Significant Difference

AbstractG protein γ subunit qPE9-1 plays multiple roles in rice growth and development. However, the role of qPE9-1 in rice exposed to elevated carbon dioxide concentration (eCO2) is unknown. Here, we investigated its role in the regulation of rice growth under eCO2 conditions using qPE9-1 overexpression (OE) lines, RNAi lines and corresponding WT rice. Compared to atmospheric carbon dioxide concentration (aCO2), relative expression of qPE9-1 in rice leaf was approximately tenfold higher under eCO2. Under eCO2, the growth of WT and qPE9-1-overexpressing rice was significantly higher than under aCO2. Moreover, there was no significant effect of eCO2 on the growth of qPE9-1 RNAi lines. Furthermore, WT and qPE9-1-overexpressing rice showed higher net photosynthetic rate and carbohydrate content under eCO2 than under aCO2. Moreover, the relative expression of some photosynthesis related genes in WT, but not in RNAi3 line, showed significant difference under eCO2 in RNA-seq analysis. Compared to WT and RNAi lines, the rbcL gene expression and Rubisco content of rice leaves in qPE9-1-overexpressors were higher under eCO2. Overall, these results suggest that qPE9-1 is involved in rice adaptation under elevated CO2 concentration by regulating leaf photosynthesis via moderating rice photosynthetic light reaction and Rubisco content.

scholarly journals Method for Estimation of CO2 Gains from Persons in Builidings

Proceedings ◽  
2018 ◽  
Vol 2 (20) ◽  
pp. 1309 ◽  
Author(s):  
Antonio Rodero ◽  
Dorota Anna Krawczyk
Keyword(s):  
Carbon Dioxide ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Males And Females ◽  
Sources Of Co2

Carbon dioxide concentration is an important parameter to know Indoor Air Quality of a building. One of the most important sources of CO2 in poor ventilated building is human activity. This work presents a method for experimental determination of human CO2 generation rate based on measuring of time evolution of indoor CO2 concentration. The method is applied to 5 rooms of an educational building from Bialystok (Poland). Similar carbon dioxide gains were obtained in all rooms, around 0.0046 L/s, which correspond to theoretical CO2 generation rates of a sedentary activity for persons, males and females, between 21–30 years old, characteristics of occupants of analyzed rooms.

scholarly journals INVESTIGATING THE HISTORICAL CORRELATION BETWEEN ATMOSPHERIC CARBON DIOXIDE CONCENTRATION AND GLOBAL TEMPERATURE CHANGE

2021 ◽  
pp. 5-16
Author(s):  
Kneev Sharma ◽  
Dimitre Karamanev
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Temperature Rise ◽  
Atmospheric Carbon Dioxide ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Global Temperature ◽  
Atmospheric Carbon Dioxide Concentration ◽  
Important Relationship ◽  
Atmospheric Carbon

Understanding the fundamental relationship between atmospheric carbon dioxide concentration and temperature rise is essential for tackling the problem of climate change that faces us today. Misconceptions regarding the relationship are widespread due to media and political influences. This investigation aims to address the popular misconception that CO2 concentration directly and naturally leads to global temperature rise. While anthropogenic CO2 emissions seem to affect the rising global atmospheric temperature with a confidence of 95%, it falters when the historical relationship using ice core data is studied. This investigation uses two statistical approaches to determine an accurate range and direction for this important relationship. Through a combined approach, it was found that historically CO2 concentration in the last 650 000 years lags global temperature rise by 1020-1080 years with a maximum correlation coefficient of 0.8371-0.8372. This result is important for the investigation of climate change.

Influence of Carbon Dioxide Concentration on Microalgal Growth in a Bubble Column Photobioreactor

2012 ◽  
Vol 599 ◽  
pp. 137-140 ◽  
Author(s):  
Shu Wen Li ◽  
Sheng Jun Luo ◽  
Rong Bo Guo
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Chlorella Vulgaris ◽  
Co2 Sequestration ◽  
High Efficiency ◽  
Bubble Column ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Dry Biomass ◽  
Bubble Column Photobioreactor

The CO2 sequestration by microalgae is thought to be one of the most sustainable strategies to relieve global warming. To produce 1 ton of microalgal dry biomass, 2 ton of CO2 is required. However, insufficient supply of CO2 will limit microalgal growth, and excessive CO2 both means wasting and inhibits microalgal growth. In the present study, the dissolved CO2 concentration in culture limiting and inhibiting microalgal growth (Chlorella vulgaris) in a bubble column photobioreactor was studied. The experimental results showed that the dissolved CO2 concentration ranging from 107μmol/L to 1500 μmol/L could meet microalgal growth’s need, which provides the guidance for microalgal CO2 biofixation with high efficiency.

scholarly journals Infection by Xanthomonas campestris pv.viticola under temperature increase and carbon dioxide concentrations

2018 ◽  
Vol 8 (2) ◽  
pp. 214-220
Author(s):  
Jaime Luiz Albuquerque Conceição ◽  
FRANCISLENE ANGELOTTI ◽  
Ana Rosa Peixoto ◽  
Raquel Ghini
Keyword(s):  
Carbon Dioxide ◽  
Incubation Period ◽  
Temperature Increase ◽  
Xanthomonas Campestris ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Bacterial Suspension ◽  
Bacterial Canker ◽  
Progress Curve ◽  
The Impact

The experiments were carried out under controlled conditions to evaluate the impact of increased temperature and concentration of carbon dioxide on infection of Xanthomonas campestris pv viticola, the causal agent of bacterial canker in Vine seedlings. It proceeded the evaluation of the following epidemiological components: incubation period (PI), severity (SEV) and using that data were calculated the area under the disease progress curve (AUDPC). It used grape seedlings (Italia, Crimson Seedless, Sugraone and Selection 8) inoculated with bacterial suspension (108 CFU mL-1). The experimental design was completely randomized, factorial arrangement 4x4 (cultivar x temperature) and 4x2 (cultivar x carbon dioxide concentration) which was carried out twice. The data were subjected to variance analysis. Increasing temperature reduced bacterium’s incubation period with significant differences between genotypes. For Selection 8 and Crimson temperature increase caused enhancement on severity and AUDPC. For Seleção 8 the incubation period (PI) was extended from 7.93 to 30.18 days when the concentration changed from 390 to 770 µmol/mol. The increased CO2 concentration reduced AACPSD and SEV for Sugraone and Selection 8. The results show that the temperature and carbon dioxide (CO2) concentration of the air may have different effects on bacterial canker of grapevine.

scholarly journals Experimental Study on Cabin Carbon Dioxide Concentration in Light Passenger Vehicles

2020 ◽  
Vol 2 (1) ◽  
pp. 88
Author(s):  
Daluwathu Mulla Gamage Preethichandra ◽  
Lasitha Piyathilaka ◽  
Umar Izhar
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Initial Study ◽  
Long Distance ◽  
Long Distance Running ◽  
Single Person ◽  
Metabolic Activities ◽  
Carbon Dioxide Co2 ◽  
Total Volatile Organic Compounds

This paper discusses the initial experimental results of monitoring carbon dioxide (CO2) and total volatile organic compounds (TVOC) inside automobiles with different cabin sizes and with different numbers of occupants. The initial study shows that the CO2 and TVOC concentrations are inversely proportional to cabin volume and proportional to passenger numbers and time when the metabolic activities were maintained at the same level. This study was aimed at short distance travel on normal roads, and further studies are to be carried out for long distance running on highways to make sound decisions on automatic air inflow control to maintain the in-cabin air within permissible levels of CO2. The study shows that a CO2 concentration of 1500 ppm is reached by all three light passenger vehicle types used within 20 minutes with a single person and reached a CO2 level of nearly 3000 ppm within the same time with two passengers in the cabin.

scholarly journals Effects of Temperature, Relative Humidity, and Carbon Dioxide Concentration on Growth and Glucosinolate Content of Kale Grown in a Plant Factory

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1524
Author(s):  
Milon Chowdhury ◽  
Shafik Kiraga ◽  
Md Nafiul Islam ◽  
Mohammod Ali ◽  
Md Nasim Reza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Relative Humidity ◽  
Statistical Significance ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Physical Growth ◽  
Glucosinolate Content ◽  
Growth Stages ◽  
Plant Factory ◽  
Effects Of Temperature

The growth of plants and their glucosinolate content largely depend on the cultivation environment; however, there are limited reports on the optimization of ambient environmental factors for kale grown in plant factories. This study was conducted to investigate the effects of temperature, relative humidity, and the carbon dioxide (CO2) concentration on kale growth and glucosinolate content in different growth stages of cultivation in a plant factory. Kale was grown under different temperatures (14, 17, 20, 23, and 26 °C), relative humidities (45, 55, 65, 75, and 85%), and CO2 concentrations (400, 700, 1000, 1300, and 1600 ppm) in a plant factory. Two and four weeks after transplantation, leaf samples were collected to evaluate the physical growth and glucosinolate contents. The statistical significance of the treatment effects was determined by two-way analysis of variance, and Duncan’s multiple range test was used to compare the means. A correlation matrix was constructed to show possible linear trends among the dependent variables. The observed optimal temperature, relative humidity, and CO2 range for growth (20–23 °C, 85%, and 700–1000 ppm) and total glucosinolate content (14–17 °C, 55–75%, and 1300–1600 ppm) were different. Furthermore, the glucosinolate content in kale decreased with the increase of temperature and relative humidity levels, and increased with the increase of CO2 concentration. Most of the physical growth variables showed strong positive correlations with each other but negative correlations with glucosinolate components. The findings of this study could be used by growers to maintain optimum environmental conditions for the better growth and production of glucosinolate-rich kale leaves in protected cultivation facilities.

scholarly journals Carbon dioxide measurements in the nocturnal boundary layer over Amazonian forest

1999 ◽  
Vol 3 (1) ◽  
pp. 39-53 ◽  
Author(s):  
A. D. Culf ◽  
G. Fisch ◽  
Y. Malhi ◽  
R. Carvalho Costa ◽  
A. D. Nobre ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Boundary Layer ◽  
Carbon Dioxide Concentration ◽  
Surface Flux ◽  
Co2 Concentration ◽  
Early Morning ◽  
Nocturnal Boundary Layer ◽  
Maximum Height ◽  
Carbon Dioxide Concentrations ◽  
The Difference

Abstract. Measurements of carbon dioxide concentration, temperature and windspeed were made in the nocturnal boundary layer over a tropical forest near Manaus, Brazil using a tethered balloon system. The measurements were made up to a maximum height of 300 m on ten consecutive nights in November 1995. Simultaneous surface flux and in-canopy concentration measurements were made at the surface close to the site. The observation period included several different types of conditions. Generally strong windshear and relatively weak temperature gradients prevented the formation of a strong capping inversion to the nocturnal boundary layer. On some nights, however, the inversion was sufficiently strong that the CO2 concentration at 100 m above the surface exceeded 400 ppm. The concentration within the canopy was largely controlled by the presence of an inversion very close to the canopy surface. The temperature and wind profiles are contrasted with conditions in Randônia, Brazil, where the windshear was found to be weaker and higher carbon dioxide concentrations were observed in the early morning. The difference in carbon dioxide concentrations in the nocturnal boundary layer between dusk and dawn is used to estimate the regional nighttime flux of carbon dioxide. The value obtained generally exceeds the measured surface flux and sometimes exceeds the sum of the surface flux and the in-canopy storage made at the tower site. The reasons for the discrepancy are not clear; either one of the methods is in error or the regional carbon dioxide budget differs significantly from the local budget measured at the tower site.

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