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Acidity Factors Limiting Nodulation Nitrogen Fixation And Growth Of Phaseolus Vulgaris L
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Book Synopsis Acidity Factors Limiting Nodulation, Nitrogen Fixation and Growth of PHaseolus Vulgaris L. by : Avílio Antonio Franco
Download or read book Acidity Factors Limiting Nodulation, Nitrogen Fixation and Growth of PHaseolus Vulgaris L. written by Avílio Antonio Franco and published by . This book was released on 1981 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bean (Phaseolus vulgaris L.) is extensively grown in tropical regions, mostly in developing countries without use of N-fertilizer. However, root nodulation and N2-fixation has been found variable under acidic conditions, when soil is used as growth medium. Conditions and techniques for achieving good nodulation of bean in continuous aerated solution culture were developed. The effects of pH on uptake and distribution of Mo in bean were studied in greenhouse and growth chamber experiments in soil and solution culture. The effects of pH and Al on nodule initiation and growth, nitrogen fixation (C2H2-reduction) and shoot and root growth were studied in solution and san culture. Growth and nitrogenase activity of nodule and plant growth in solution culture were atleast as good as in gravel. However, nodule initiation was restricted to plants inoculated before or imediately after transfer of seedlings to solution and was restricted to the roots already present before transfer. Lack of nodulation could not be explained by failure of bacteria to colonize the root or absence of root hairs. There were indications that the P-status of the plant together with a factor or factors that had to accumulate or deplete in solution, determined success or failure of nodulation. Daily application of 0.5-1.0 mg N per plant delayed nodule growth and nitrogen fixation slightly, but increased plant growth and alleviated the severe N-deficiency stress before the onset of N2-fixation. In six cultivars, Mo uptake in solution culture was ...
Book Synopsis Acidity Factors Limiting Nodulation, Nitrogen Fixation and Growth of Phaseolus Valgaris L. by : A. A. Franco
Download or read book Acidity Factors Limiting Nodulation, Nitrogen Fixation and Growth of Phaseolus Valgaris L. written by A. A. Franco and published by . This book was released on 1981 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bean (Phaseolus vulgaris L.) is extensively grown in tropical regions, mostly in developing countries without use of N-fertilizer. However, root nodulation and N2-fixation has been found variable under acidic conditions, when soil is used as growth medium. Conditions and techniques for achieving good nodulation of bean in continuous aerated solution culture were developed. The effectes of pH on uptake and distribution of Mo in bean were studied in greenhouse and growth chamber experiments in soil and solution culture. The effects of pH and A1 on nodule initiation and growth, nitrogen fixation (C2H2- reduction) and shot and root growth studied in solution and sand culture. Growth and nitrogrenase activity of nodule and plant growth in solution culture were at as good as in gravel. However, nodule initiation was restricted to plants inoculated before or immediately after transfer of seedlings to solution and restricted to the roots already present before transfer. Lack of nodumation could not be explained by failure of bacteria to colonize the root or absence of root hairs. There were indications that the P-status of the plant together with a facto or factors that had to accumulate or deplete in solution determined success or failure of nodulation. Daily application of 0.5-1.0 mg n per plant delayed growth and nitrogen fixation slightly, but increased plant growth and alleviated the severe N-deficiency stree before the onest of N2-fication. In six cultivars, Mo uptake in silution culture was little infuenced by pH in the range 4.8 to 5.8. Likewise, in more detailed experiments with the cv. Venezuela 350, there was little or no effect either pH (4.8.-6.3) or temperature (21-31 c) on Mo accumulation or distribution. over a wide range of Mo supply in soil and solucion culture. Mo concentration was always higher in nodules then other plat parts at low external concentrations. On bean cultivar acculated more Mo in stem and seed than five other cultivars. Plants of all cultivars tested accumulated ten times more seed Mo when grown on entisol at Davis, Califonia, than on an oxisol in Brazil. These data confirm that genetic and environmetal controls on seed Mo can be manipulated to help control Mo deficiency. Concentrations of A1 up 83 uM in solution did not affect rrot dry weight, nodule growth and nitrogenase activity of nodules alredy initiated of the two bean cultivars tested (Venezuela 350 and Carioca); while in both cultivars, nodule initiation was restricted by A1 in solution above 33 uM. Shoot growth was restricted by 19 uM A1 in cv. Carioca but in cv. Venezuela 350. Total root length of both cultivars were restricted by 19 uM A1. Decreasing pH from 5.5 to 5.0 or 4.5. in sand culture reduced nodule production of young plants by 90%. Similar results were oberved in solution culture, indicating that evan though A1 toxicity may affect nodulation, the effect of A1 on plat growth and the detrimental effect of pH itself were much more importante in determining the suceses of growth and aerly nodulation of the two bean cultivars studied.
Book Synopsis Aspects of Nodule Function and Plant Development in Phaseolus Vulgaris L. by : Gautam Sarath
Download or read book Aspects of Nodule Function and Plant Development in Phaseolus Vulgaris L. written by Gautam Sarath and published by . This book was released on 1984 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen fixation in legumes depends on assimilate supply from shoot to root. Assimilate partitioning within a plant is influenced by plant growth substances (PGS). Little information is available on the effects of PGS on nodulated plants with respect to nodule function and subsequent partitioning of carbon and nitrogen. Nodulated plants of Phaseolus vulgaris L. were grown in sterile sand on a nitrogen-free solution. Aqueous solutions of abscisic acid (ABA, 1 x 10(elevado a -6 M) or benzyladenine (BA, 1 z x 10(elevado a -5 M) were applied to primary leaves 10d after germination or to the first trifolialate leaf 25d after germination for 10 consecutive days. Controls received distilled water. In plants with treated primary leaves, grown at a photon flux density of 160 (micron)E m (elevado a menos 2)s (elevado a menos 1) photosynthetically active radiation (PAR), ABA application enhanced plant growth (total plant dry matter, total plant nitrogen, nodule acetyene reduction rates (AR) and increased nitrogen and dry matter partitioning to the roots and the leavels). In contrast, BA application reduced plant grown. At a higher light level (350 micron E m(elevado a menos 2) s (elevado a menos 1, PAR) differences in parameters between treatments and controls were not as pronounced; howver, the trends at both ligth levels were similar for treated plants. ABA effects were more pronounced when it was applied to the first trifoliolate leaf. Diurnal AR was comparatively higher in ABA-treated plants. Relative efficiency showed least change in ABA-treated plants. Leaf and nodule metabolite levels varied with time of day and also were influenced by the treatments. ABA-treated plants assimilated greatest amounts of (14 CO2) and showed greater distribution of 14 C-labelled plants assimilates to roots and the upper leaves. BA-treated plants assimilated the least amount of (14CO2). In control plants, upper stems acumulated 46% of total plant radioactivity. These results demonstrate that PGS can alter nodule function and subsequent partiti oning of assimilates. Results of these studies should aid in understanding factors which influence assimilate partitioning in nodulated systems.
Book Synopsis Symbiotic Nitrogen Fixation by : P. Graham
Download or read book Symbiotic Nitrogen Fixation written by P. Graham and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past three decades there has been a large amount of research on biological nitrogen fixation, in part stimulated by increasing world prices of nitrogen-containing fertilizers and environmental concerns. In the last several years, research on plant--microbe interactions, and symbiotic and asymbiotic nitrogen fixation has become truly interdisciplinary in nature, stimulated to some degree by the use of modern genetic techniques. These methodologies have allowed us to make detailed analyses of plant and bacterial genes involved in symbiotic processes and to follow the growth and persistence of the root-nodule bacteria and free-living nitrogen-fixing bacteria in soils. Through the efforts of a large number of researchers we now have a better understanding of the ecology of rhizobia, environmental parameters affecting the infection and nodulation process, the nature of specificity, the biochemistry of host plants and microsymbionts, and chemical signalling between symbiotic partners. This volume gives a summary of current research efforts and knowledge in the field of biological nitrogen fixation. Since the research field is diverse in nature, this book presents a collection of papers in the major research area of physiology and metabolism, genetics, evolution, taxonomy, ecology, and international programs.
Book Synopsis Improvement of Yields of Common Beans (Phaseolus Vulgaris L.) by Increased Nitrogen Fixation in Soils with Low Phosphorus Levels by : Irene Christiansen
Download or read book Improvement of Yields of Common Beans (Phaseolus Vulgaris L.) by Increased Nitrogen Fixation in Soils with Low Phosphorus Levels written by Irene Christiansen and published by . This book was released on 2001 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bacterial Stress Responses by : Gisela Storz
Download or read book Bacterial Stress Responses written by Gisela Storz and published by American Society for Microbiology Press. This book was released on 2010-11-16 with total page 1167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gain new insight on utilizing bacterial stress responses to better combat bacterial infection with antibiotics and improve biotechnology. • Reviews the vast number of new findings that have greatly advanced the understanding of bacterial stress responses in the past 10 years. • Explores general regulatory principles, including the latest findings from genomics studies, including new research findings on both specific and general stress responses. • Details how stress responses affect the interactions between bacteria and host cells and covers bacterial stress responses in different niches and communities, with an emphasis on extreme environments.
Book Synopsis Genetic Aspects of Plant Nutrition by : M.R. Saric
Download or read book Genetic Aspects of Plant Nutrition written by M.R. Saric and published by Springer Science & Business Media. This book was released on 1983-09-30 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea of addressing the problem of the genetic specificity of mineral nutrition at an international level arose four years ago in a proposal for this topic to be included in the program of the II Congress of the Federation of European Societies for Plant Physiology (FESPP) as a separate section. The Organising Committee of the II Congress of FESPP which was held in Santiago de Compostella in 1980 arranged a special session and it was clearly successful. A special scientific meeting where the genetic aspects of plant nutrition in their widest sense could be presented and discussed comprehensively appeared to be necessary and that is how this Symposium came to be organized by the Serbian Academy of Sciences and Arts. Much progress has already been achieved in this field, and bearing in mind the importance of this problem, particularly at the present moment, it is necessary for us both to acquaint ourselves with what has been achieved so far, and even more to direct attention and effort to the fundamental problems for the future.
Book Synopsis Tolerance of Beans (Phaseolus Vulgaris, L.) and Rhizobium Leguminosarum Bv Phaseoli to Low PH by : Alvaro Augusto Teixeira Vargas
Download or read book Tolerance of Beans (Phaseolus Vulgaris, L.) and Rhizobium Leguminosarum Bv Phaseoli to Low PH written by Alvaro Augusto Teixeira Vargas and published by . This book was released on 1987 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Abstracts on Field Beans (Phaseolus Vulgaris L.) by :
Download or read book Abstracts on Field Beans (Phaseolus Vulgaris L.) written by and published by . This book was released on 1991 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Biology and Ecology of Nitrogen Fixation by : Takuji Ohyama
Download or read book Advances in Biology and Ecology of Nitrogen Fixation written by Takuji Ohyama and published by BoD – Books on Demand. This book was released on 2014-01-29 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological nitrogen fixation has essential role in N cycle in global ecosystem. Several types of nitrogen fixing bacteria are recognized: the free-living bacteria in soil or water; symbiotic bacteria making root nodules in legumes or non-legumes; associative nitrogen fixing bacteria that resides outside the plant roots and provides fixed nitrogen to the plants; endophytic nitrogen fixing bacteria living in the roots, stems and leaves of plants. In this book there are 11 chapters related to biological nitrogen fixation, regulation of legume-rhizobium symbiosis, and agriculture and ecology of biological nitrogen fixation, including new models for autoregulation of nodulation in legumes, endophytic nitrogen fixation in sugarcane or forest trees, etc. Hopefully, this book will contribute to biological, ecological, and agricultural sciences.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1987 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhancement of Biological Nitrogen Fixation of Common Bean in Latin America by : F.A. Bliss
Download or read book Enhancement of Biological Nitrogen Fixation of Common Bean in Latin America written by F.A. Bliss and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The common bean (Phaseolus vulgaris L.) is the most important pulse crop in Latin America, as well as in large parts of Asia and Africa. It is particularly important due to its ability, in symbiosis with Rhizobium bacteria, to fix atmospheric nitrogen and due to its high nutrient value. Incorporating contributions from plant breeders, microbiologists, plant physiologists and soil scientists, this volume reports the results of an FAO/IAEA Coordinated Research Programme (1985--1991), whose main objective was to enhance yield and biological nitrogen fixation in common bean by reducing its reliance on soil and fertilizer nitrogen. The volume will be invaluable to scientists working on biological nitrogen fixation and legume production.
Book Synopsis Soil Acidity and Liming by : Fred Adams
Download or read book Soil Acidity and Liming written by Fred Adams and published by . This book was released on 1984 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of acidity. Physiological effects of hydrogen, aluminum, and managanese toxicities in acid soil. Physiological aspects of calcium, magnesium, and molybdenum deficiencies in plants. Liming materials and practices. Crop response to lime in the southern united states. Crop response to lime in the midwestern united states. Crop response to lime in the northeastern united states. Crop response to lime in the wested states. Crop response to lime on soils in the tropics. Glossary-common and scientific names of crops referred to in this monograph.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1996 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Managing Nutrient Cycles to Sustain Soil Fertility in Sub-Saharan Africa by : André Bationo
Download or read book Managing Nutrient Cycles to Sustain Soil Fertility in Sub-Saharan Africa written by André Bationo and published by CIAT. This book was released on 2004 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nitrogen Fixation in Tropical Cropping Systems by : K. E. Giller
Download or read book Nitrogen Fixation in Tropical Cropping Systems written by K. E. Giller and published by CABI. This book was released on 2001 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen fixation by leguminous plants is especially important when farmers are trying to minimise fertilizer use for cost or environmental reasons. This second edition of the highly successful book, first published in 1991, contains thoroughly updated and revised material on the theory and practice of nitrogen fixation in tropical cropping systems.
Book Synopsis Properties and Management of Soils in the Tropics by : Pedro A. Sanchez
Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
