Seventeen years of elevated CO2 exposure in a Chesapeake Bay Wetland: sustained but contrasting responses of plant growth and CO2 uptake

2005 ◽  
Vol 11 (3) ◽  
pp. 369-377 ◽  
Author(s):  
Daniel P. Rasse ◽  
Gary Peresta ◽  
Bert G. Drake
Keyword(s):  
Plant Growth ◽  
Chesapeake Bay ◽  
Elevated Co2 ◽  
Co2 Uptake

scholarly journals Decomposition analysis on soybean productivity increase under elevated CO2 using 3-D canopy model reveals synergestic effects of CO2 and light in photosynthesis

2019 ◽  
Vol 126 (4) ◽  
pp. 601-614 ◽  
Author(s):  
Qingfeng Song ◽  
Venkatraman Srinivasan ◽  
Steve P Long ◽  
Xin-Guang Zhu
Keyword(s):  
Climate Change ◽  
Elevated Co2 ◽  
Developmental Stages ◽  
Decomposition Analysis ◽  
Crop Productivity ◽  
Minor Role ◽  
Co2 Uptake ◽  
Canopy Architecture ◽  
Area Index ◽  
Canopy Model

Abstract Background and Aims Understanding how climate change influences crop productivity helps in identifying new options to increase crop productivity. Soybean is the most important dicotyledonous seed crop in terms of planting area. Although the impacts of elevated atmospheric [CO2] on soybean physiology, growth and biomass accumulation have been studied extensively, the contribution of different factors to changes in season-long whole crop photosynthetic CO2 uptake [gross primary productivity (GPP)] under elevated [CO2] have not been fully quantified. Methods A 3-D canopy model combining canopy 3-D architecture, ray tracing and leaf photosynthesis was built to: (1) study the impacts of elevated [CO2] on soybean GPP across a whole growing season; (2) dissect the contribution of different factors to changes in GPP; and (3) determine the extent, if any, of synergism between [CO2] and light on changes in GPP. The model was parameterized from measurements of leaf physiology and canopy architectural parameters at the soybean Free Air CO2 Enrichment (SoyFACE) facility in Champaign, Illinois. Key Results Using this model, we showed that both a CO2 fertilization effect and changes in canopy architecture contributed to the large increase in GPP while acclimation in photosynthetic physiological parameters to elevated [CO2] and altered leaf temperature played only a minor role in the changes in GPP. Furthermore, at early developmental stages, elevated [CO2] increased leaf area index which led to increased canopy light absorption and canopy photosynthesis. At later developmental stages, on days with high ambient light levels, the proportion of leaves in a canopy limited by Rubisco carboxylation increased from 12.2 % to 35.6 %, which led to a greater enhancement of elevated [CO2] to GPP. Conclusions This study develops a new method to dissect the contribution of different factors to responses of crops under climate change. We showed that there is a synergestic effect of CO2 and light on crop growth under elevated CO2 conditions.

scholarly journals Disturbance is required for CO2-dependent promotion of woody plant growth in grasslands

2010 ◽  
Vol 37 (6) ◽  
pp. 555 ◽  
Author(s):  
Beth R. Loveys ◽  
John J. G. Egerton ◽  
Dan Bruhn ◽  
Marilyn C. Ball
Keyword(s):  
Plant Growth ◽  
Elevated Co2 ◽  
Seedling Growth ◽  
Woody Plant ◽  
Competitive Inhibition ◽  
Bare Soil ◽  
Tree Seedlings ◽  
Soil Resources ◽  
Canopy Area ◽  
Thermal Interference

The relative effects of disturbance (here defined as bare soil), competition for edaphic resources, thermal interference and elevated [CO2] on growth of tree seedlings in grasslands were studied under field conditions. Snow gum (Eucalyptus pauciflora Sieb. ex Spreng.) seedlings were grown in open-top chambers flushed with either ambient or elevated [CO2] from March 2004 to January 2005 (autumn to summer). These seedlings were planted into three treatments (i.e. bare soil, soil covered with straw or soil supporting a sward of live pasture grass) to separate effects of grass on seedling growth into those due to competition with grass for soil resources or to alteration of the thermal environment caused by a grassy surface (Ball et al. 2002). After the first major autumn frost, seedlings growing in competition with grass lost 59% of their canopy area, whereas those growing in bare soil or straw suffered negligible damage. These results reveal the complexity of competitive inhibition of plant growth in which ineffective competition for resources such as soil water enhances the vulnerability of the plant to abiotic stress, in this case frost. Tree seedlings growing in bare soil and straw commenced growth earlier in spring than those growing in competition with grass, where soil moisture was consistently lowest. Under ambient [CO2], growth was greater in bare soil than in straw, consistent with thermal interference, but these differences disappeared under elevated [CO2]. Elevated [CO2] significantly increased biomass accumulation for seedlings growing in bare soil and straw treatments, but not in grass. Thus, elevated [CO2] alleviated apparent thermal interference of seedling growth in spring but did not overcome adverse effects on seedling growth of either competitive reduction in soil resources or competitive enhancement of environmental stress. Nevertheless, elevated [CO2] could promote invasion of grasslands due to enhancement of woody plant growth in bare soil created by disturbances.

scholarly journals Uncertainty Analysis of a Coupled Hydrological-plant Growth Model for Grassland under Elevated CO2

2015 ◽  
Vol 29 ◽  
pp. 79-80
Author(s):  
Juliane Kellner ◽  
Sebastian Multsch ◽  
Philipp Kraft ◽  
Tobias Houska ◽  
Christoph Mueller ◽  
...  
Keyword(s):  
Plant Growth ◽  
Uncertainty Analysis ◽  
Elevated Co2 ◽  
Growth Model ◽  
Plant Growth Model

Interactions between plant growth and soil nutrient cycling under elevated CO2 : a meta-analysis

2006 ◽  
Vol 12 (11) ◽  
pp. 2077-2091 ◽  
Author(s):  
MARIE-ANNE De GRAAFF ◽  
KEES-JAN Van GROENIGEN ◽  
JOHAN SIX ◽  
BRUCE HUNGATE ◽  
CHRIS Van KESSEL
Keyword(s):  
Plant Growth ◽  
Nutrient Cycling ◽  
Elevated Co2 ◽  
Meta Analysis ◽  
Soil Nutrient ◽  
Soil Nutrient Cycling

scholarly journals INFLUENCE OF ELEVATED CO2 ON THE GROWTH AND PHENOLIC CONSTITUENTS PRODUCTION IN HIBISCUS SABDARIFFA VAR. UKMR-2

2019 ◽  
Vol 81 (3) ◽  
Author(s):  
Siti Aishah Mohd Ali ◽  
Che Radziah Che Mohd Zain ◽  
Jalifah Latip
Keyword(s):  
Antioxidant Activity ◽  
Plant Growth ◽  
Elevated Co2 ◽  
Global Climate ◽  
Carbon Dioxide Concentration ◽  
Growth Yield ◽  
Total Phenolic ◽  
Hibiscus Sabdariffa ◽  
Phenolic Constituents ◽  
The Impact

The impact of global climate change on plants which has been widely reported can exhibit significant changes on the growth, yield and metabolite production. Studies on the impact of elevated carbon dioxide concentration, [CO2] on plant growth and production of phenolic constituents in Hibiscus sabdariffa var. UKMR-2 has not been reported in any previous studies. This study investigated the growth quality and production of phenolic constituents of UKMR-2 under different [CO2]. The cultivation was subjected to two atmospheric [CO2]; ambient (400 µmol/mol), and elevated (800 µmol/mol). Selected parameters for growth performance were recorded throughout the plant development. UKMR-2 calyx extract was analysed for total phenolic, total anthocyanins, antioxidant activity, and evaluated based on HPLC-PDA method. The results revealed that UKMR-2 responded differently to the [CO2] treatments. The results clearly showed that exposure to elevated [CO2] increased calyx yields, production of phenolic constituents, and antioxidant activity. Furthermore, different [CO2] had significant interaction on the production of phenolic constituents, and antioxidant activity (p < 0.05), except for plant growth. The HPLC-PDA showed the presence of delphinidin-3-O-sambubioside, cyanidin-3-O-sambubioside, ascorbic acid, caffeic acid, and chlorogenic acid. Therefore, increased [CO2] may have significant effects on UKMR-2 to not only produce higher production yields, but also on the production of phenolic constituents with potential physiological impact to human health.

Soil development under elevated CO2 affects plant growth responses to CO2 enrichment

2003 ◽  
Vol 4 (2) ◽  
pp. 185-195 ◽  
Author(s):  
Grant R. Edwards ◽  
Harry Clark ◽  
Paul C.D. Newton
Keyword(s):  
Plant Growth ◽  
Elevated Co2 ◽  
Co2 Enrichment ◽  
Soil Development ◽  
Growth Responses

Carbon Metabolism and Plant Growth under Elevated CO2 in a Natural Quercus ilex L. “Macchia” Stand

1996 ◽  
pp. 209-230 ◽  
Author(s):  
Giuseppe E. Scarascia-Mugnozza ◽  
Paolo De Angelis ◽  
Giorgio Matteucci ◽  
Elena Kuzminsky
Keyword(s):  
Plant Growth ◽  
Elevated Co2 ◽  
Carbon Metabolism ◽  
Quercus Ilex

Pseudomonas putida inoculation promotes submerged plant Vallisneria natans growth by carbon conversion in a plant–microbe interaction

2018 ◽  
Vol 69 (5) ◽  
pp. 851
Author(s):  
Lin Gan ◽  
Hui Zhao ◽  
Aili Wang ◽  
Sanshan Li ◽  
Jia Liu ◽  
...  
Keyword(s):  
Plant Growth ◽  
Pseudomonas Putida ◽  
Leaf Area ◽  
Heterotrophic Bacteria ◽  
Dissolved Inorganic Carbon ◽  
Light Limitation ◽  
Co2 Uptake ◽  
Carbon Conversion ◽  
Submerged Plant ◽  
Vallisneria Natans

Submerged plant growth is limited by the reduction of underwater photosynthesis attributed to low CO2 availability, as well as light limitation associated with underwater conditions. Heterotrophic bacteria and fungi play an important role in local aqueous dissolved inorganic carbon (DIC) content surrounding submerged plants. In order to investigate the effects of carbon conversion in plant–microbe interactions on plant growth, in the present study we inoculated the plant medium of Vallisneria natans with Pseudomonas putida KT2440 and measured carbon conversion in the system, as well as several indices of plant growth. The quantity of P. putida KT2440 increased twofold because of the availability of organic matter produced by V. natans. Similarly, P. putida KT2440 supplied DIC for V. natans, improving its photosynthetic rate. Moreover, the significantly higher leaf area, specific leaf area and fresh biomass of V. natans attributed to the presence of P. putida KT2440 demonstrated that the interaction between V. natans and P. putida enhanced the efficiency of nutrient and CO2 uptake by V. natans, promoting V. natans growth. Therefore, we suggest that the carbon and oxygen microcycle based on the protocooperation of V. natans and P. putida KT2440 may accelerate the transformation of carbon to increase carbon availability to promote the growth of both plant and microbe.

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