Download or read book Evaluation of Di nitrogen Fixation in Early and Late Developmental Stages of Soybean Glycine Max L Merr written by Raphael Lemes Hamawaki and published by . This book was released on 2018 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen (N) is present in proteins, enzymes, cell structures, purines and pyrimidines in DNA and RNA molecules, photosynthetic pigments, and several other types of molecules in all living organisms. Nonetheless, even though N makes up more than 78% of the atmosphere, it is reported to be the most frequent deficient nutrient in plants. Nitrate (NO3- ) and ammonium (NH4+) are the N forms absorbed by plants from soil, but legume crops can establish symbiotic relationships with rhizobia bacteria, and fix N2 from the atmosphere. In soybean, increasing yield and protein content are raising the crop's N requirement; therefore, enhanced N2 fixation is seen as a reliable path to avoid the use of N fertilizers. In this study, the objective was to perform a comprehensive screening in greenhouse and field conditions of soybean genotypes for traits related to N2 fixation. The purpose was to identify among the soybean genotypes different N2 fixation profiles at early and late stages, as well as to investigate their capacity to accumulate above-ground N and supply carry-over N to following crops. The results showed different profiles among the soybean genotypes for early and late N2 fixation capacity, both in greenhouse and field evaluations. Different traits were correlated to either early or late N2 fixation activity. Soybean and winter-rye shoot dry mass were evaluated in the field to assess above-ground N accumulation and carry-over N, respectively. Soybean genotypes were identified with specific capacities to accumulate N in above-ground biomass or supply N to winter-rye. The patterns of N2 fixation identified in this study, as well as the different abilities to accumulate N above-ground or supply N to following crops, could assist in the selection of superior lines with improved N2 fixation capacity.

Download or read book History of Research on Nitrogen Fixation in Soybeans 1887 2018 written by William Shurtleff; Akiko Aoyagi and published by Soyinfo Center. This book was released on 2018-11-26 with total page 1129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographical index. 91 photographs and illustrations - mostly color, Free of charge.

Download or read book Nitrogen Fixation in Soybeans revision 1979 1983 written by Jayne T. MacLean and published by . This book was released on 1983 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Fixation in High Yielding Soybean Glycine Max L Merr written by Fernando Salvagiotti and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Symbiotic Nitrogen Fixation in the Soybean Glycine Max L Merr Indeterminate Growth Habit written by Lisbet Ann Phillips and published by . This book was released on 1979 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of the Rotational Influence and Nitrogen Contribution of Soybean Glycine Max L Merr to Subsequent Crops written by Timothy S. Maloney and published by . This book was released on 1995 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Fixation and Metabolism in Soybean Plants written by Takuji Ohyama and published by Nova Science Publishers. This book was released on 2009 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the first part, the authors introduce the progress of researches on nitrogen metabolism of soybean nodules and roots. They investigate the fate of nitrogen fixed in soybean nodules by tracer experiment with 15N2 gas. The results indicate that major part of fixed N in bacteroids (a symbiotic state of rhizobia) is excreted rapidly to cytosol of infected cells in the form of ammonia, then the ammonia is assimilated into amino acids via GS/GOGAT pathway. Then the fixed nitrogen is assimilated into ureides, allantoin and allantoic acid, and then transported to the shoots via xylem. A small portion of fixed N was assimilated in the bacteroids directly into glutamate and alanine. On the other hand, nitrate absorbed from the roots are mainly assimilated into asparagine. The characteristics of nitrate absorption and metabolism was studied. It is well known that nitrate is a potent inhibitor to nodulation and nitrogen fixation, although the inhibitory mechanism is not fully understood. The authors recently found that nitrate depresses individual nodule growth and nitrogen fixation activity rapidly and reversibly when nodules were in direct contact with nitrate. The indirect effects of nitrate on nodule growth and nitrogen fixation activity were different among treatment concentration and period of supply. The continuous supply of low levels of nitrate from the lower part of roots promoted the nodulation and nitrogen fixation of the upper part of the roots. Hypernodulation mutant lines of soybean were isolated which have profuse nodulation compared with parents. They also exhibit partial-nitrate tolerant to nodulation. The characteristics of hypernodulation mutant lines were studied in relation to nitrate inhibition. The results suggest that lower nitrate absorption and assimilation activity in hypernodulation mutants may be one reason to milder inhibition by nitrate on hypernodulation mutant lines.

Download or read book Screening and Selection for Enhanced Dinitrogen Fixation in Soybean Glycine Max L Merrill of Maturity Groups 00 and 0 written by Susan Lee Neuhausen and published by . This book was released on 1986 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simultaneous Measurement of Nitrate Absorption and N C H Fixation by Soybeans Glycine Max L Merr During Reproductive Growth and Development written by Robert Dale Wych and published by . This book was released on 1977 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Crown Nodule Senescence in Soybean Glycine Max L Merr Cultivars of Maturity Group I written by David Espinosa-Victoria and published by . This book was released on 1997 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Soybean Glycine Max L Merr Root Development in Greenhouse Solution Culture and the Relationship to Drought Tolerance in the Field written by Lynn Liane Scherbert and published by . This book was released on 1985 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inheritance and Characterization of Delayed Leaf Senescence in Soybeans Glycine Max L Merrill written by Robert Osteen Pierce and published by . This book was released on 1982 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Factors Affecting Symbiotic Nitrogen Fixation in Soybeans Glycine Max L Merr written by R. J. Lawn and published by . This book was released on 1973 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Symbiotic Nitrogen Fixation by Soybean Glycine Max L Merr in Acid Soils written by Arief Indrasumunar and published by . This book was released on 1999 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selection for Early Nodulation and Dinitrogen Fixation in the Soybean Bradyrhizobium Symbiosis written by David Leonard Pazdernik and published by . This book was released on 1995 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A New Technology of Deep Placement of Slow Release Nitrogen Fertilizers for Promotion of Soybean Growth and Seed Yield written by Kaushal Tewari and published by Nova Biomedical Books. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean seeds contain a large amount of protein (about 35%), and there is a significant correlation between the total amount of N accumulated in soybean plants and seed yield. Soybean utilises N from several sources, including mineralised soil organic matter, symbiotically fixed N, and N from fertiliser when applied. Soybean plants fix a large amount of N by root nodules symbiotically associated with soil bacteria called "rhizobia". However, sole N2 fixation is often insufficient to support the vigorous vegetative and reproductive growth of soybean plants. For the maximum yield of soybean, it is necessary to use both N2 fixation by root nodules and nitrogen absorption from roots. This book introduces the promotive effects of deep placement of slow release N fertilisers on growth, N2 fixation activity and seed yield of soybean cultivated in some rotated paddy fields of Niigata prefecture, Japan, including rotated paddy fields and upland fields.

Download or read book Improving Soybean Glycine Max L N2 Fixation Under Salinity Stress written by Mohammad Miransari and published by LAP Lambert Academic Publishing. This book was released on 2014-04-30 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is important to find methods, which may alleviate the adverse effect of stress on the growth of plants. Salinity is an important stress world wide, unfavorably affecting plant growth and crop production, Here we have presented a new method, which can efficiently alleviate salinity stress on the growth and nitrogen fixing ability of soybean and the associative N fixing bacteria, Bradyrhizobium japonicum. During the process of symbiotic N fixation between soybean and B. japonicum, the initial stages of the process, most importantly the exchange of signal molecules between the two, symbionts, are unfavorably affected by the stress. Accordingly, we hypothesized, tested and proved that if the bacteria is preincubated with the specific signal molecule, genistein, they are able to alleviate salinity stress on the growth and N fixing ability of soybean and B. japonicum. The book can be used by a wide range of audience including students, researches, academicians and scientists at the related disciplines, including plant biology, plant physiology, microbiology, biotechnology, molecular biology, environment, etc. Hoping that such a contribution can be used efficiently and widely.