Download or read book Effect of Nitrogen on Rates of Photosynthesis and Dark Respiration in Barley Hordeum Vulgare L Plants written by M. Wadhawan and published by . This book was released on 1989 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Nitrogen Supply on the Rates of Photosynthesis and Respiration in Plants written by Karl Clemens Hamner and published by . This book was released on 1935 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of High Leaf Temperature and Nitrogen Concentration on Barley Hordeum Vulgare L Photosynthesis and Flowering written by Mohammad Adel Almousa and published by . This book was released on 2016 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Nitrogen Supply on Rates of Photosynthesis and Respiration in Plants a Dissertation by Karl Clemens Hamner written by Karl Clemens Hamner and published by . This book was released on 1936 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Nitrogen Supply on Rates of Photosynthesis and Respiration in Plants written by Karl Clemens Hamner and published by . This book was released on 1935 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Control of Photosynthesis written by R. Marcelle and published by Springer. This book was released on 1986-01-31 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summing-up: measuring photosynthesis in vivo; Limitation of photosynthesis by RuBP regeneration rate; Cooperativity between the subunits of a higher plant rubisco: a superactive state of the ensyme; Regions of the large subunit that compose the active site; Discrepancy between rubpco kinetics and photosynthetic gas exchange of C3 leaves; Mechanisms for the regulation of CO2 fixation by ribulose-1, 5-bisphosphate carboxylase; Photosynthetic parameters as measured via non-radiative de-excitation; The regulation of ensymes of sucrose metabolism in plant sinks; The light dependent ammonia metabolism im wheat and maize leaves; Theorical and experimental observations on O2 sensitivity of C3 photosynthesis; Effect of oxygen on photosynthesis in bean (Phaseolus vulgaris L.) leaves at elevated carbon dioxide concentration; Mass spectrometric analysis of photosynthetic oxygen evolution and uptake by chlamydomonas reinhardtii; The influence of CO2 enrichment of the atmosphere and NaCl on growth and metabolism of Urtica dioica L.; Different limiting processes of photosynthesis in lichens; Net photosynthesis of Calluna vulgaris (L) Hull; Control of photosynthesis by variation of diffusion resistance in mistletoes and their hosts; The humidity factor in stomatal control and its effect on crop productivity; Photosynthesis, nitrogen levels, and dry matter accumulation in flag wheat leaves during grain filling; Leaf architecture and net photosynthetic rate during ontogeny of primary french bean leaves; Organization of photosynthetic system of dorsivental leaves as adapted to the irradiation from the adaxial side; Rhe control of photosynthetic gas exchange by assimilate accumulation in wheat; Source-sink balance as a factors in photosynthetic acclimatization; Photosynthesis and respiration of two inbred lines of Plantago major L. differing in relative growth rate; Carbon and nitrogen metabolism in photorespiratory mutants of barley (Hordeum vulgare L.).
Download or read book Effect of Seed Protein Content on Plant Growth of Barley and Wheat written by Arturo Lopez and published by . This book was released on 1972 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to evaluate the effect of seed protein content on plant growth of barley (Hordeum vulgare L.) and wheat (Triticum aestivum L.). The effects of nitrogen application on chemical and morphological characteristics of the seed were also studied. Seeds of 'Casbon' winter barley and 'Nugaines' winter wheat with different protein content were obtained by field applications of various amounts of nitrogen at seeding time (fall) and tillering time (spring). The increase in protein content from high nitrogen rates was accompanied by a decrease in seed size and yield. The protein increase occurred primarily in the endosperm. Neither protein content nor size of the embryo was affected by rates of nitrogen application. The effect of seed protein content on plant growth was evaluated in terms of inhibition and respiration, speed of germination and subsequent seedling growth, root and shoot elongation at 15, 20 and 25C, and dry matter production when grown in low and high nitrogen soils in the green house. A positive relationship was found between seed protein content and plant performance. The rates of water absorption and oxygen consumption of germinating barley and wheat seed increased as a result of high protein content. High protein seed had a faster speed of germination and developed into larger seedlings with a higher dry matter content when grown in nitrogen-deficient soil. In nitrogen-enriched soil, seed protein content had little effect on seedling growth. The beneficial effects of seed protein content are more clearly expressed under stress conditions and are more evident when plant growth depends on the nutrients available from the seed. During initiation of germination, temperature influences the expression of the protein effect. After the seedling has formed and is capable of photosynthesis, the nitrogen availability in the soil influences the effect of seed protein content on plant growth. The relationship between seed protein content and plant growth can be an important factor in crop production because the increase in protein can be controlled by field application of nitrogen. However, since the high rates of nitrogen necessary to produce high seed protein levels are not consistent with the optimum nitrogen rates for yield, growers would probably be reluctant to apply such high rates unless some type of incentive were given them to do so. For seed production, it could still be important to strive for high protein levels in spite of some loss in yield if improved performance from high protein seeds proves to be of economic value. The results of this study indicate that producing and planting seeds rich in protein may be an effective method of achieving faster stand establishment of cereal crops. Additional research will determine the effects of high protein on yield.
Download or read book Physiological and Biochemical Responses of Barley hordeum Vulgare L to Nitrogen Availability written by Ana Clarissa Alves Negrini and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen (N) is one of the most important nutrients for plant growth and crop performance. Increases in the use of N have contributed to increases in agricultural production over the past 50 years. Large amounts of this fertilizer are applied to cereals crops to maximize yields; however, excessive fertilizer application is a source of several environmental problems, including pollution and increase in CO2 emissions. One way of minimizing N application to crops is by designing genotypes with increased nitrogen use efficiency (NUE). Previous studies showed that overexpression of alanine aminotransferase (AlaAT) resulted in significant increases in the NUE of canola and rice plants. This technology has been applied to barley, with preliminary studies showing promising results in terms of biomass increase and seed production. With the aim of having a more detailed understanding of the physiological mechanisms underpinning the performance of the AlaAT barley genotypes, an ecologically-focused approach was adopted to evaluate the efficiency of N use and growth performance in early vegetative stages of barley. To establish guidelines to study AlaAT overexpressing barley genotypes, a detailed growth analysis was first performed with wild-type plants grown on six N concentrations, to understand how N supply affects the carbon (C) and N economy of this crop at different stages of vegetative development. The results of these studies revealed interesting insights on the effect of N on the underlying growth parameters, and determined that the major factors affecting grown as a result of N availability are C and N allocation among above and below-ground organs. Furthermore, these studies revealed the importance of controlling for ontogenetic drift by comparing plants of similar masses when analyzing the effect of N availability on growth traits. Subsequently, analysis of the C and N economy of the AlaAT overexpressing barley genotypes revealed no increases in growth and N productivity compared to null controls. Biochemical measurements suggested that post-translational issues may have prevented increase in AlaAT activity and protein abundance during the vegetative period over which plants were grown. The role of N on agricultural production goes beyond the increase in plant growth and seed yield. N fertilization, in the form of NO3- also increases crop performance and survival during waterlogging. However, the mechanism behind this improvement in hypoxia tolerance has not yet been elucidated. With the aim of having a better understanding about N supply and hypoxia interaction, I analyzed the effect of NO3-availability on the global gene expression in response to hypoxia in barley. My results suggest that NO3- availability may be linked to the increase in ATP production, and that N supply affected numerous events within barley plants. This includes changes in N and C allocation that resulted changes in growth rate and biomass accumulation, protein expression, and transcriptomic responses to low oxygen stress. My thesis research suggests that increases in the efficiency of N use could be achieved by improving the capacity for N uptake and assimilation, associated with a reduction in the proportion of respiratory losses to maintain a large root system.
Download or read book Photosynthesis Physiology and Metabolism written by Richard C. Leegood and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photosynthesis: Physiology and Metabolism is the we have concentrated on the acquisition and ninth volume in theseries Advances in Photosynthesis metabolism of carbon. However, a full understanding (Series Editor, Govindjee). Several volumes in this of reactions involved in the conversion of to series have dealt with molecular and biophysical sugars requires an integrated view of metabolism. aspects of photosynthesis in the bacteria, algae and We have, therefore, commissioned international cyanobacteria, focussing largely on what have been authorities to write chapters on, for example, traditionally, though inaccurately, termed the ‘light interactionsbetween carbon and nitrogen metabolism, reactions’(Volume 1, The Molecular Biology of on respiration in photosynthetic tissues and on the Cyanobacteria;Volume2,AnoxygenicPhotosynthetic control of gene expression by metabolism. Photo- Bacteria, Volume 3, Biophysical Techniques in synthetic carbon assimilation is also one of the most Photosynthesis and Volume 7, The Molecular Biology rapid metabolic processes that occurs in plant cells, of the Chloroplasts and Mitochondria in Chlamy- and therefore has to be considered in relation to domonas). Volume 4 dealt with Oxygenic Photo- transport, whether it be the initial uptake of carbon, synthesis: The Light Reactions, and volume 5 with intracellular transport between organelles, inter- Photosynthesis and the Environment, whereas the cellular transport, as occurs in plants, or transport structure and function of lipids in photosynthesis of photosynthates through and out of the leaf. All was covered in Volume 6 of this series: Lipids in these aspects of transport are also covered in the Photosynthesis: Structure, Function and Genetics, book.
Download or read book Plant Respiration written by Hans Lambers and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Respiration in plants, as in all living organisms, is essential to provide metabolic energy and carbon skeletons for growth and maintenance. As such, respiration is an essential component of a plant’s carbon budget. Depending on species and environmental conditions, it consumes 25-75% of all the carbohydrates produced in photosynthesis – even more at extremely slow growth rates. Respiration in plants can also proceed in a manner that produces neither metabolic energy nor carbon skeletons, but heat. This type of respiration involves the cyanide-resistant, alternative oxidase; it is unique to plants, and resides in the mitochondria. The activity of this alternative pathway can be measured based on a difference in fractionation of oxygen isotopes between the cytochrome and the alternative oxidase. Heat production is important in some flowers to attract pollinators; however, the alternative oxidase also plays a major role in leaves and roots of most plants. A common thread throughout this volume is to link respiration, including alternative oxidase activity, to plant functioning in different environments.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1984 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the XVII International Grassland Congress written by New Zealand Grassland Association and published by . This book was released on 1993 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Grasslands for Our World written by M. J. Baker and published by . This book was released on 1993 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Nutrition for Sustainable Food Production and Environment written by Tadao Ando and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 975 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the history of the International Plant Nutrition Colloquium from its first meeting in 1954, this meeting, the 13th Colloquium, is the first to be held in Asia and will be the last in the 20th century. The 20th century has seen huge changes in the number and activities of mankind. Our population has increased from around 1. 7 billion to more than 5. 8 billion and technological innovations have completely altered our way of living. As a consequence of such rapid change, we are facing many problems including changes in our environment of a global scale. But, while food shortage has been a serious concern to mankind throughout our history, serious food shortages in the 20th century have been confined to limited times and areas. As Lester Brown discusses in this volume, farmers have increased food production heroically on demand. We, the plant nutritionists should be proud of our support to the world's farmers which has helped them make their achievement possible. During the 20th century, the science of plant nutrition also has achieved great progress as described by Jack Loneragan; it became established as a discipline firmly based in science, defined the chemical elements supporting plant growth, and has contributed to improvements in plant production and environmental quality, as readers will find in many contributions in this volume.
Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1971 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pesticides Documentation Bulletin written by and published by . This book was released on 1965 with total page 1210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1971 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
