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1

Nagiev, T. M., N. I. Ali-zadeh, L. M. Gasanova, I. T. Nagieva, Ch A. Mustafaeva, N. N. Malikova, A. A. Abdullaeva, and E. S. Bakhramov. "NITROGEN FIXATION AT CONJUGATED OXIDATION." Azerbaijan Chemical Journal, no. 2 (2018): 6–10. http://dx.doi.org/10.32737/0005-2531-2018-2-6-10.

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2

O'GARA, FERGAL. "Nitrogen Fixation." Biochemical Society Transactions 13, no. 3 (June 1, 1985): 639. http://dx.doi.org/10.1042/bst0130639a.

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3

Wen-Yue Hsiung. "Nitrogen Fixation." Forest Ecology and Management 10, no. 4 (May 1985): 348–50. http://dx.doi.org/10.1016/0378-1127(85)90127-6.

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4

Becker, James Y., and Shlomit Avraham (Tsarfaty). "Nitrogen fixation." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 280, no. 1 (February 1990): 119–27. http://dx.doi.org/10.1016/0022-0728(90)87088-2.

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5

Becker, James Y., Shlomit Avraham (Tsarfaty), and Barry Posin. "Nitrogen fixation." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 230, no. 1-2 (August 1987): 143–53. http://dx.doi.org/10.1016/0022-0728(87)80138-9.

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6

Becker, James Y., and Barry Posin. "Nitrogen fixation." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 250, no. 2 (August 1988): 385–97. http://dx.doi.org/10.1016/0022-0728(88)85178-7.

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7

Davis, Lawrence C. "Fundamentals of nitrogen fixation an introduction to nitrogen fixation." Trends in Biochemical Sciences 12 (January 1987): 451–52. http://dx.doi.org/10.1016/0968-0004(87)90216-7.

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8

Smith, B. E. "Fertilizer fixation nitrogen fixation in plants." Trends in Biochemical Sciences 12 (January 1987): 36. http://dx.doi.org/10.1016/0968-0004(87)90018-1.

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9

Sprent, J. I., and M. Alexander. "Biological Nitrogen Fixation." Journal of Applied Ecology 22, no. 2 (August 1985): 601. http://dx.doi.org/10.2307/2403193.

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10

Mylona, Panagiota, Katharina Pawlowski, and Ton Bisseling. "Symbiotic Nitrogen Fixation." Plant Cell 7, no. 7 (July 1995): 869. http://dx.doi.org/10.2307/3870043.

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11

Burris, R. H., and G. P. Roberts. "Biological Nitrogen Fixation." Annual Review of Nutrition 13, no. 1 (July 1993): 317–35. http://dx.doi.org/10.1146/annurev.nu.13.070193.001533.

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12

Lehnert, Nicolai, Hai T. Dong, Jill B. Harland, Andrew P. Hunt, and Corey J. White. "Reversing nitrogen fixation." Nature Reviews Chemistry 2, no. 10 (September 27, 2018): 278–89. http://dx.doi.org/10.1038/s41570-018-0041-7.

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13

Wiseman, Alan, Gordon C. Hartman, and Barry E. Smith. "Biological nitrogen fixation." Journal of Biological Education 19, no. 1 (March 1985): 24–30. http://dx.doi.org/10.1080/00219266.1985.9654683.

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14

MULLIN, BETH C. "Symbiotic Nitrogen Fixation." Soil Science 160, no. 5 (November 1995): 385–86. http://dx.doi.org/10.1097/00010694-199511000-00009.

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15

Sprent, J. "Prokaryotic nitrogen fixation." Applied Soil Ecology 16, no. 2 (February 2001): 193–94. http://dx.doi.org/10.1016/s0929-1393(00)00125-6.

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16

Gallon, John R. "Nitrogen without fixation." Trends in Microbiology 5, no. 10 (October 1997): 419. http://dx.doi.org/10.1016/s0966-842x(97)89761-2.

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17

Smith, Barry E. "Nitrogen and diversity biological nitrogen fixation." Trends in Biochemical Sciences 18, no. 3 (March 1993): 109–10. http://dx.doi.org/10.1016/0968-0004(93)90165-j.

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18

McFarland, Mel A., and Dale W. Toetz. "Nitrogen fixation (acetylene reduction) in Lake Hefner, Oklahoma." Archiv für Hydrobiologie 114, no. 2 (December 14, 1988): 213–30. http://dx.doi.org/10.1127/archiv-hydrobiol/114/1988/213.

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19

Takahashi, Mikio, and Yatsuka Saijo. "Nitrogen metabolism in Lake Kizaki, Japan V. The role of nitrogen fixation in nitrogen requirement of phytoplankton." Archiv für Hydrobiologie 112, no. 1 (March 24, 1988): 43–54. http://dx.doi.org/10.1127/archiv-hydrobiol/112/1988/43.

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20

Wang, Qianru, Yeqin Guan, Jianping Guo, and Ping Chen. "Hydrides mediate nitrogen fixation." Cell Reports Physical Science 3, no. 3 (March 2022): 100779. http://dx.doi.org/10.1016/j.xcrp.2022.100779.

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21

Jayasankari, N., and S. Shanmugasundaram. "Nitrogen fixation byNostoc strains." Proceedings / Indian Academy of Sciences 94, no. 1 (March 1985): 59–64. http://dx.doi.org/10.1007/bf03053107.

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22

Saha, U., and M. Sen. "Nitrogen fixation byCandida tropicalis." Proceedings / Indian Academy of Sciences 100, no. 5 (October 1990): 343–52. http://dx.doi.org/10.1007/bf03053458.

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23

Jenkins, Michael B. "Nitrogen Fixation, 3rd Edition." Journal of Environmental Quality 29, no. 6 (November 2000): 2047–48. http://dx.doi.org/10.2134/jeq2000.00472425002900060047x.

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24

Miller, Lynn. "Peloponnesia and Nitrogen Fixation." Nature Biotechnology 6, no. 7 (July 1988): 841. http://dx.doi.org/10.1038/nbt0788-841a.

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25

Rabinovich, Daniel. "Nitrogen Fixation before Haber." Chemistry International 40, no. 3 (July 1, 2018): 3. http://dx.doi.org/10.1515/ci-2018-0302.

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Abstract Much has been written about the German chemist Fritz Haber (1868-1934), who embodies at once the best and the worst that chemistry has offered to humankind. He received the Nobel Prize in Chemistry a century ago (1918) “for the synthesis of ammonia from its elements,” an industrial process that led to the pervasive use of nitrogen-based fertilizers in agriculture and enabled the unprecedented population growth experienced in the world ever since. On the other hand, Haber is often considered the “father of chemical warfare” for his role in the development and deployment of chlorine and other poisonous gases during World War I. This note, however, is not about Haber’s legacy but pays tribute instead to two resourceful Norwegians who preceded him in the quest for converting atmospheric nitrogen into more reactive, bioavailable forms of the element.
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26

VanHook, Annalisa M. "Signaling for nitrogen fixation." Science 360, no. 6385 (April 12, 2018): 166.19–168. http://dx.doi.org/10.1126/science.360.6385.166-s.

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27

Magingo, Francis S. S., and Claudius K. Stumm. "Nitrogen fixation byMethanobacterium formicicum." FEMS Microbiology Letters 81, no. 3 (July 1991): 273–77. http://dx.doi.org/10.1111/j.1574-6968.1991.tb04771.x.

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28

Vance, Carroll P. "Nitrogen Fixation. John Postgate." Quarterly Review of Biology 75, no. 3 (September 2000): 305. http://dx.doi.org/10.1086/393510.

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29

Elkan, G. H., and GEORGE H. WAGNER. "Symbiotic Nitrogen Fixation Technology." Soil Science 145, no. 6 (June 1988): 464. http://dx.doi.org/10.1097/00010694-198806000-00014.

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30

Comyns, Alan E. "Progress in Nitrogen Fixation." Focus on Catalysts 2010, no. 2 (February 2010): 1–2. http://dx.doi.org/10.1016/s1351-4180(10)70001-5.

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31

GALLON, J. R. "Nitrogen Fixation in Plants." Biochemical Society Transactions 16, no. 6 (December 1, 1988): 1098. http://dx.doi.org/10.1042/bst0161098a.

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32

Gruber, Nicolas. "Elusive marine nitrogen fixation." Proceedings of the National Academy of Sciences 113, no. 16 (April 8, 2016): 4246–48. http://dx.doi.org/10.1073/pnas.1603646113.

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33

Towe;, K. M. "Evolution of Nitrogen Fixation." Science 295, no. 5556 (February 1, 2002): 798–99. http://dx.doi.org/10.1126/science.295.5556.798.

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34

Bazhenova, T. A., and A. E. Shilov. "Nitrogen fixation in solution." Coordination Chemistry Reviews 144 (October 1995): 69–145. http://dx.doi.org/10.1016/0010-8545(95)01139-g.

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35

Long, Sharon R. "Nitrogen fixation in plants." Cell 48, no. 6 (March 1987): 912. http://dx.doi.org/10.1016/0092-8674(87)90699-4.

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36

Ausubel, F. M., B. Hoffman, P. McLean, E. Münck, D. Wink, W. Orme-Johnson, A. Anderson, et al. "Nitrogenase and nitrogen fixation." Journal of Inorganic Biochemistry 36, no. 3-4 (August 1989): 167. http://dx.doi.org/10.1016/0162-0134(89)84068-1.

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37

Maier, G�nther, Hans Peter Reisenauer, Jochem Henkelmann, and Christine Kliche. "Nitrogen Fixation by Borabenzene." Angewandte Chemie International Edition in English 27, no. 2 (February 1988): 295–96. http://dx.doi.org/10.1002/anie.198802951.

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38

Swain, T. "Nitrogen fixation in plants." Biochemical Systematics and Ecology 16, no. 1 (January 1988): 115–16. http://dx.doi.org/10.1016/0305-1978(88)90125-1.

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39

Hubbell, D. H. "Nitrogen Fixation Research Programs." Forest Science 32, no. 4 (December 1, 1986): 1099. http://dx.doi.org/10.1093/forestscience/32.4.1099.

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40

Arango, Clay Porter, Leslie Anne Riley, Jennifer Leah Tank, and Robert Ogden Hall,. "Herbivory by an invasive snail increases nitrogen fixation in a nitrogen-limited stream." Canadian Journal of Fisheries and Aquatic Sciences 66, no. 8 (August 2009): 1309–17. http://dx.doi.org/10.1139/f09-079.

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Despite anthropogenic nitrogen contributions, nitrogen fixation contributes half of biosphere inputs but has rarely been quantified in streams. Herbivory controls algal biomass and productivity in streams, and we hypothesized that herbivory could also control nitrogen fixation. We released periphyton from herbivory in nitrogen-limited Polecat Creek, Wyoming, where heavy grazing by the invasive New Zealand mudsnail ( Potamopyrgus antipodarum ) dominates nitrogen cycling. One and two weeks after releasing periphyton, we found higher rates of nitrogen fixation on heavily grazed rocks (two-way analysis of variance (ANOVA), p = 0.012). Time elapsed after snail manipulation had no effect (two-way ANOVA, p = 0.24). Grazing changed periphyton composition by reducing the proportion of green algae and increasing the proportion of nitrogen-fixing diatoms (multivariate ANOVA, p = 0.001). Nitrogen fixation rates increased disproportionately to nitrogen-fixing algal cells, indicating that snails increased nitrogenase efficiency, probably by improving light and (or) nutrient availability to nitrogen fixers. We incorporated our nitrogen fixation rates into a published nitrogen budget for Polecat Creek and found that nitrogen flux into the periphyton was 50% higher when we included nitrogen fixation. Herbivory can increase nitrogen fixation in streams, and future studies should measure nitrogen fixation for a more thorough understanding of stream nitrogen cycling.
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41

Merbach, W., and H. J. Jacob. "Nitrogen Fixation and Nitrogen Fertilization of Soybeans." Isotopes in Environmental and Health Studies 32, no. 2-3 (August 1996): 173–80. http://dx.doi.org/10.1080/10256019608036309.

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42

Kimble, Linda K., and Michael T. Madigan. "Nitrogen fixation and nitrogen metabolism in heliobacteria." Archives of Microbiology 158, no. 3 (August 1992): 155–61. http://dx.doi.org/10.1007/bf00290810.

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43

Šimon, T. "Utilization of the biological nitrogen fixation for soil evaluation." Plant, Soil and Environment 49, No. 8 (December 10, 2011): 359–63. http://dx.doi.org/10.17221/4137-pse.

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Non-symbiotic nitrogen fixation (potential nitrogenase activity – PNA) of soil samples originating from different plots of long-term field experiments (selected variants: Nil, NPK [mineral fertilisation: 64.6–100 kg N/ha/year], FYM [farmyard manure], and FYM + NPK from three blocks III, IV and B with different crop rotation) was determined in laboratory experiments. The symbiotic nitrogen fixation (total nitrogenase activity – TNA) of the same soil samples was evaluated in hydroponic experiments with pea (2001, 2002) and lucerne (2001) in which the soil samples were used as a natural inoculum. The high values of PNA were found in the variants fertilised with FYM in all three blocks and all experiments. Simultaneously, the variants fertilised with mineral NPK reached low values of PNA. The farmyard manuring enhanced the number of free-living bacteria Azotobacter spp. that were identified in all soil samples. In the hydroponic experiments with pea, the highest nonsignificant values of TNA were found in variants B 284 (FYM + NPK) and III 254 (FYM + NPK) in 2001, and B 214 (FYM) and III 214 (FYM) in 2002. Plants inoculated with soil from these variants formed also high amounts of nodules (significant differences in block IV in 2001) and plant biomass. In the experiments with lucerne, the nonsignificantly highest TNA values were found in variant III 154 (NPK). Variants from block III (214, 254) and IV (114 and 154) showed the nonsignificantly lowest TNA values. The rhizobia that effectuate symbiosis with pea were more active in the soil samples in 2001 than those forming nodules on lucerne.
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44

Yu, Tong, and Qianlai Zhuang. "Modeling biological nitrogen fixation in global natural terrestrial ecosystems." Biogeosciences 17, no. 13 (July 13, 2020): 3643–57. http://dx.doi.org/10.5194/bg-17-3643-2020.

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Abstract. Biological nitrogen fixation plays an important role in the global nitrogen cycle. However, the fixation rate has been usually measured or estimated at a particular observational site. To quantify the fixation amount at the global scale, process-based models are needed. This study develops a biological nitrogen fixation model to quantitatively estimate the nitrogen fixation rate by plants in a natural environment. The revised nitrogen module better simulates the nitrogen cycle in comparison with our previous model that has not considered the fixation effects. The new model estimates that tropical forests have the highest fixation rate among all ecosystem types, which decreases from the Equator to the polar region. The estimated nitrogen fixation in global terrestrial ecosystems is 61.5 Tg N yr−1 with a range of 19.8–107.9 Tg N yr−1 in the 1990s. Our estimates are relatively low compared to some early estimates using empirical approaches but comparable to more recent estimates that involve more detailed processes in their modeling. Furthermore, the contribution of nitrogen made by biological nitrogen fixation depends on ecosystem type and climatic conditions. This study highlights that there are relatively large effects of biological nitrogen fixation on ecosystem nitrogen cycling. and the large uncertainty of the estimation calls for more comprehensive understanding of biological nitrogen fixation. More direct observational data for different ecosystems are in need to improve future quantification of fixation and its impacts.
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45

Sumaira Mazhar, Sumaira Mazhar, and Jerry D. Cohen and Shahida Hasnain Jerry D Cohen and Shahida Hasnain. "Novel Approach for the Determination of Nitrogen Fixation in Cyanobacteria." Journal of the chemical society of pakistan 41, no. 1 (2019): 105. http://dx.doi.org/10.52568/000711/jcsp/41.01.2019.

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Non-heterocystous nitrogen fixing strains of cyanobacteria were screened by their ability to grow in nitrogen deficient media. The selected nitrogen fixing cyanobacterial cells were then cultured in BG11 media supplemented with [15N]-labeled sodium nitrate. Under these growth conditions any organic [14N] found in the cyanobacterial cells would simply come from nitrogen fixation because [15N] was the only available source of nitrogen in the medium. Amino acids extracted after different time periods (after 15, 30, 40, 50 and 60 days of inoculation) were used for the determination of the 14N/15N ratio using GC-MS. Results from the present study support the conclusion that at stationary phase of growth cyanobacterial nitrogen fixation was no longer supplying a significant amount of nitrogen. This approach not only provided a detailed method for the evaluation of the nitrogen fixing potential of the cyanobacteria in culture, but also suggests novel approaches for the assessment of the ability of the strains to provide nitrogen enrichment to plants under co-cultivation conditions.
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46

Madinger, Hilary L., and Robert O. Hall Jr. "Nitrogen fluxes in Western streams." UW National Parks Service Research Station Annual Reports 40 (December 15, 2017): 61–68. http://dx.doi.org/10.13001/uwnpsrc.2017.5575.

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Nitrogen pollution to streams is altering the nitrogen cycling in unknown ways, causing challenges for predicting nitrogen fixation fluxes within aquatic ecosystems. Increasing nitrate pollution decreases the amount of nitrogen fixation occurring in streams. However, the relationship between stream nitrate concentration and the rate of nitrogen fixation is unknown. We predict that lower nitrate streams will have the highest rates of nitrogen fixation. Additionally, there will be much more energy produced in streams with nitrogen fixation compared to the amount required to fix the nitrogen. We estimated whole-stream gross primary production and nitrogen fixation fluxes using the diel change in dissolved nitrogen and oxygen gases compared to the expected dissolved gas saturation. Our whole-stream method is preferable to chamber estimates to understand the relationship between energy requirements for nitrogen fixation and gross primary production, but additional data is needed to distinguish between relationship types and make our measurements generalizable. Featured photo by Intermountain Forest Service, USDA Region 4 Photography on Flickr. https://flic.kr/p/jbTRUj
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47

Nadkernychna, O. V., S. M. Minenok, R. L. Boguslavsky, and O. Yu Leonov. "ASSESSMENT OF WINTER WHEAT VARIETIES BY THEIR ASSOCIATIVE NITROGEN FIXATION ABILITY." Agriciltural microbiology 17 (October 1, 2013): 67–78. http://dx.doi.org/10.35868/1997-3004.17.67-78.

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The paper depicts the results of intervarietal variability study of winter wheat plants in controlled environment with varieties Albatross Odessa, Kiriya, Zolotokolosa, Lybid and Odeska 267 by their associative nitrogen fixation ability. The 5.6 – 13.7 – fold divergence between the varieties by given index was revealed. It was shown that intravarietal variability of winter wheat plants by their ability to stimulate associative nitrogen fixation occurs along with the intervarietal one. Populations intensity of a different genotypes characterized by high nitrogen fixation activity in root zone, stipulates high nitrogen fixation potential of variety. Among the studied varieties Zolotokolosa was selected as genetically homogeneous variety with high nitrogen fixation potential of rhizosphere microorganisms that can be recommended for use in breeding as a source with high capacity for associative nitrogen fixation. New winter wheat varieties with high nitrogen fixation potential can fully develop using not only mineral nitrogen fertilizers, but also interacting with associative nitrogen fixation microorganisms should partially replace mineral nitrogen with biological that, in turn, will guarantee a high yield quality and conservation of agricultural landscapes.
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48

Liu, Ying, Zhenhui Yan, Jianguo Wang, Jihao Zhao, Yiyang Liu, Jie Zou, Lin Li, Jialei Zhang, and Shubo Wan. "Optimizing Initial Nitrogen Application Rates to Improve Peanut (Arachis hypogaea L.) Biological Nitrogen Fixation." Agronomy 13, no. 12 (December 8, 2023): 3020. http://dx.doi.org/10.3390/agronomy13123020.

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The application of nitrogen fertilizer is crucial to the growth and biological nitrogen fixation of peanut, especially in the seedling stage where nodules have not yet formed. However, it is still uncertain how much initial nitrogen fertilizer should be applied to promote peanut root growth, nodule formation, and biological nitrogen fixation (BNF). There, a 2-year pot experiment was conducted using Huayu 22 (HY22, large-grain cultivar) and Huayu 39 (HY39, small-grain cultivar) as experimental materials to research the effects of different initial nitrogen fertilizer application rates on peanut root growth (root weight, root length, root mean diameter, root activity) and biological nitrogen fixation capacity (nodule number, nodule weight, biological nitrogen fixation, and nitrogen fixation potential per plant). N0, as control, four initial nitrogen fertilizer application rates were established: 15 kg·hm−2 (N15), 30 kg·hm−2 (N30), 45 kg·hm−2 (N45), and 60 kg·hm−2 (N60). The present results showed that the nodule number, nodule dry weight, nitrogenase activity, and biological nitrogen fixation of the HY22 cultivar under the N15 treatment were higher compared to those under other treatments over the two growing seasons. In addition, the cultivar of HY39 treated with the N15 treatment also increased the nitrogen fixation potential per plant and BNF relative to other treatments. Although the application of 60 kg·hm−2 nitrogen increased the root surface area and root volume, it decreased the nitrogenase activity, nodule dry weight, and nitrogen fixation potential per plant of HY22 and HY39 varieties in both growing seasons. Above all, an initial nitrogen application of 15 kg·hm−2 may be the optimal treatment for promoting peanut nodule formation and biological nitrogen fixation.
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49

Fekete, Frank A. "Nitrogen Fixation Nitrogen Fixation in Plants R. O. D. Dixon C. T. Wheeler." BioScience 37, no. 6 (June 1987): 428–29. http://dx.doi.org/10.2307/1310571.

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50

Zhang, Wenyao, Yihang Chen, Keyang Huang, Feng Wang, and Ziqing Mei. "Molecular Mechanism and Agricultural Application of the NifA–NifL System for Nitrogen Fixation." International Journal of Molecular Sciences 24, no. 2 (January 4, 2023): 907. http://dx.doi.org/10.3390/ijms24020907.

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Nitrogen–fixing bacteria execute biological nitrogen fixation through nitrogenase, converting inert dinitrogen (N2) in the atmosphere into bioavailable nitrogen. Elaborating the molecular mechanisms of orderly and efficient biological nitrogen fixation and applying them to agricultural production can alleviate the “nitrogen problem”. Azotobacter vinelandii is a well–established model bacterium for studying nitrogen fixation, utilizing nitrogenase encoded by the nif gene cluster to fix nitrogen. In Azotobacter vinelandii, the NifA–NifL system fine–tunes the nif gene cluster transcription by sensing the redox signals and energy status, then modulating nitrogen fixation. In this manuscript, we investigate the transcriptional regulation mechanism of the nif gene in autogenous nitrogen–fixing bacteria. We discuss how autogenous nitrogen fixation can better be integrated into agriculture, providing preliminary comprehensive data for the study of autogenous nitrogen–fixing regulation.
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