Download or read book The Implications of Concurrent Increases in Temperature and CO2 Concentration for Terrestrial C3 Photosynthesis written by and published by . This book was released on 1992 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study utilizes a mechanistic model of lea photosynthesis to examine the potential quantitative significance of the interaction of rising atmospheric. Carbon dioxide concentration (C{sub a}) and temperature on leaf photosynthesis. Predictions are compared to experimental measurements in which plants have been grown either in elevated C{sub a} in the field for extended periods or from seed in controlled environments, to examine the interaction of low temperature with elevated C{sub a}. Three questions addressed were: To what extent will increase in C{sub a} modify the response of leaf photosynthetic CO2 uptake (A) to temperature; is the decrease in photosynthesis at sub-optimal temperatures predicted for plants grown at elevated C{sub a}, realized in practice? Is photoinhibition accentuated in plants grown in the field at elevated C{sub a} for long-periods.

Download or read book The Implications of Concurrent Increases in Temperature and CO2 Concentration for Terrestrial C3 Photosynthesis written by and published by . This book was released on 1992 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Implications of Concurrent Increases in Temperature and CO sup 2 Concentration for Terrestrial C sup 3 Photosynthesis written by and published by . This book was released on 1992 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study utilizes a mechanistic model of lea photosynthesis to examine the potential quantitative significance of the interaction of rising atmospheric. Carbon dioxide concentration (C[sub a]) and temperature on leaf photosynthesis. Predictions are compared to experimental measurements in which plants have been grown either in elevated C[sub a] in the field for extended periods or from seed in controlled environments, to examine the interaction of low temperature with elevated C[sub a]. Three questions addressed were: To what extent will increase in C[sub a] modify the response of leaf photosynthetic CO[sub 2] uptake (A) to temperature; is the decrease in photosynthesis at sub-optimal temperatures predicted for plants grown at elevated C[sub a], realized in practice Is photoinhibition accentuated in plants grown in the field at elevated C[sub a] for long-periods.

Download or read book Research in Photosynthesis written by Norio Murata and published by Springer Science & Business Media. This book was released on 1992 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Potential Effects of Concurrent Increases in Temperature CO Sub 2 and O Sub 3 on Net Photosynthesis as Mediated by RubisCO written by and published by . This book was released on 1992 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the leaf level, under light saturating and light limiting conditions, it is shown that elevated atmospheric CO2 concentration not only alters the scale of the response of carbon gain to rising temperature, but can alter the direction of response. These points bring into serious question the value of any predictions of plant production which ignore not only the direct effect Of C02 on carbon gain, but also the basic interactions of temperature, C02 and 03. Whilst many factors may potentially diminish the enhancement of lightsaturated leaf photosynthetic rates with increase in atmospheric CO2 concentrations, no mechanism has so far been identified which could remove the parallel stimulation of light-limited photosynthesis.

Download or read book Managing Water Resources in the West Under Conditions of Climate Uncertainty written by National Research Council and published by National Academies Press. This book was released on 1991-02-01 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: The question of whether the earth's climate is changing in some significant human-induced way remains a matter of much debate. But the fact that climate is variable over time is well known. These two elements of climatic uncertainty affect water resources planning and management in the American West. Managing Water Resources in the West Under Conditions of Climate Uncertainty examines the scientific basis for predictions of climate change, the implications of climate uncertainty for water resources management, and the management options available for responding to climate variability and potential climate change.

Download or read book Terrestrial Photosynthesis in a Changing Environment written by Jaume Flexas and published by Cambridge University Press. This book was released on 2012-07-19 with total page 753 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated guide to photosynthesis in an environmentally dynamic context, covering all aspects from basic concepts to methodologies.

Download or read book Carbon Dioxide and Terrestrial Ecosystems written by George W. Koch and published by Elsevier. This book was released on 1995-12-21 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of carbon dioxide extends from cellular to global levels of organization and potential ecological deterioration may be the result of increased CO2 in our atmosphere. Recently, the research emphasis shifted from studies of photosynthesis pathways and plant growth to ground-breaking studies of carbon dioxide balances in ecosystems, regions, and even the entire globe. Carbon Dioxide and Terrestrial Ecosystems addresses these new areas of research. Economically important woody ecosystems are emphasized because they have substantial influence on global carbon dioxide balances. Herbaceous ecosystems (e.g., grasslands, prairies, wetlands) and crop ecosystems are also covered. The interactions among organisms, communities, and ecosystems are modeled, and the book closes with an important synthesis of this growing nexus of research. Carbon Dioxide and Terrestrial Ecosystems is a compilation of detailed scientific studies that reveal how ecosystems generally, and particular plants specifically, respond to changed levels of carbon dioxide. - Contributions from an international team of experts - Empirical examination of the actual effects of carbon dioxide - Variety of terrestrial habitats investigated - Specific plants and whole ecosystems offered as studies

Download or read book The Potential Effects of Concurrent Increases in Temperature CO2 and O3 on Net Photosynthesis as Mediated by Rubisco written by and published by . This book was released on 1992 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Review of Plant Physiology and Plant Molecular Biology written by Russell L. Jones and published by . This book was released on 1997-06 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Ecological Research written by and published by Academic Press. This book was released on 1999-02-12 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers highlighting the diverse interests of modern ecologists. Areas covered range from modeling terrestrial carbon exchange and storage to the relationship between animal abundance and body size. Other papers address the free-air carbon dioxide enrichment in global change research; generalist predators, interaction strength, and food web stability; delays, demography, and cycles; and spatial root segregation. This volume is essential for all ecologists.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Review of Plant Physiology and Plant Molecular Biology written by and published by . This book was released on 1997 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photosynthesis Bibliography written by Zdeněk Šesták and published by . This book was released on 1992 with total page 1114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impacts of Global Warming and Rising Atmospheric CO2 Concentrations on Physiology Development and Productivity of Midwestern Crops written by Ursula M. Ruiz Vera and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: High accumulation of greenhouse gases in the atmosphere, particularly CO2, drives increases in the global surface temperatures and is already impacting life on Earth. The impact of these changes on agro-ecosystem is particularly important as we rely on agriculture for food, fiber, and renewable energy, the demand for which is increasing as human population rises. Photosynthesis is the primary means by which plants sense rising atmospheric concentrations of CO2 ((CO2)) and all metabolic pathways are responsive to changes in temperature. In this thesis, I address, first, the effects of rising (CO2) and increasing temperatures on photosynthesis, growth and yields for the tenth most productive crop, soybean. Environmental conditions are shown to strongly influence the progression of crops through vegetative and reproductive growth stages. Therefore, I next evaluate the effects of elevated CO2 and high temperature on vegetative and reproductive development for soybean. Maize, the second most productive crop in the world, is expected to behave different than soybean under conditions of elevated CO2 and high temperatures because this crop differs in its photosynthetic pathway. Thus, I evaluate the response of photosynthesis, growth and yield in maize under the same conditions presented for soybean. My research was conducted over three years using the Temperature by Free Air CO2 Enrichment experiment (T-FACE) which simulated conditions predicted by mid-century in terms of CO2 and temperature, at the SoyFACE research facility in Champaign, IL. For soybean, photosynthesis, growth and yield were reduced with high temperatures and increased with elevated CO2. However, rising both CO2 and temperature produced a variable response that was dependent on the weather conditions during the growing season. Soybean under the combined treatment did not perform better than under only elevated (CO2) but elevated CO2 helped to mitigate the decreases in photosynthesis under high temperature conditions. Additionally, soybean presented a faster vegetative development under increased temperature which offset the delay of reproductive development caused by elevated CO2. For maize, it was found that the increase in temperature reduced photosynthesis during reproductive stages while elevated CO2 had no effect on photosynthesis. A stimulation of vegetative biomass and a reduction of yield were observed with increased temperature, resulting in no change for the total above-ground biomass. The results in this thesis add evidence for the negative effects of global warming to photosynthesis and productivity in soybean and maize. Additionally, these results are different from predictions based on laboratory or enclose experiments for the CO2 plus temperature treatment, emphasizing the necessity for in-field experiments in order to have more reliable predictions of the effects of climate change on agriculture. This thesis contributes toward improved predictions of key agronomic species grown in the Midwestern agriculture in the context of climate change.

Download or read book Crop Adaptation to Climate Change written by Shyam Singh Yadav and published by John Wiley & Sons. This book was released on 2011-08-02 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major task of our time is to ensure adequate food supplies for the world's current population (now nearing 7 billion) in a sustainable way while protecting the vital functions and biological diversity of the global environment. The task of providing for a growing population is likely to be even more difficult in view of actual and potential changes in climatic conditions due to global warming, and as the population continues to grow. Current projections suggest that the world's temperatures will rise 1.8-4.0 by 2100 and population may reach 8 billion by the year 2025 and some 9 billion by mid-century, after which it may stabilize. This book addresses these critical issues by presenting the science needed not only to understand climate change effects on crops but also to adapt current agricultural systems, particularly in regard to genetics, to the changing conditions. Crop Adaptation to Climate Change covers a spectrum of issues related to both crops and climatic conditions. The first two sections provide a foundation on the factors involved in climate stress, assessing current climate change by region and covering crop physiological responses to these changes. The third and final section contains chapters focused on specific crops and the current research to improve their genetic adaptation to climate change. Written by an international team of authors, Crop Adaptation to Climate Change is a timely look at the potentially serious consequences of climate change for our global food supply, and is an essential resource for academics, researchers and professionals in the fields of crop science, agronomy, plant physiology and molecular biology; crop consultants and breeders; as well as climate and food scientists.