scholarly journals Regulation of nitrogen fixation by different nitrogen sources in the filamentous non-heterocystous cyanobacterium Microcoleus sp.

2006 ◽  
Vol 153 (1) ◽  
pp. 11-15 ◽  
Author(s):  
Grażyna E Sroga
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Sources ◽  
Heterocystous Cyanobacterium

Regulation of nitrogen-fixation by different nitrogen sources in the marine non-heterocystous cyanobacterium Trichodesmium sp. NIBB1067

1991 ◽  
Vol 156 (5) ◽  
pp. 335-337 ◽  
Author(s):  
Kaori Ohki ◽  
Jonathan P. Zehr ◽  
Paul G. Falkowski ◽  
Yoshihiko Fujita
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Sources ◽  
Heterocystous Cyanobacterium

scholarly journals Adverse effects of nitrogenous compounds on nitrogen-fixing cyanobacterium Anabaena solitaria Klebahn

2020 ◽  
Vol 49 (4) ◽  
pp. 1095-1101
Author(s):  
Nermin Adel El Semary
Keyword(s):  
Nitrogen Fixation ◽  
Heterotrophic Bacteria ◽  
Nitrogen Sources ◽  
The Other ◽  
Nitrogen Compounds ◽  
Nitrogen Fixing ◽  
Nitrogenous Compounds ◽  
Heterocystous Cyanobacterium ◽  
Massive Growth ◽  
Cyanobacterium Anabaena

The nitrogen-fixing heterocystous cyanobacterium Anabaena solitaria was tested for its response to different concentrations of nitrogen sources, namely nitrate and ammonia. To compare both the effect of concentration and type of nitrogen source, gradual concentrations were prepared for both ammonia and nitrate. The results showed concentration was significantly important on the frequency of heterocyst formation where highest nitrogen compounds concentrations were inhibitory for heterocyst formation. On the other hand, the effect of the type of nitrogenous compounds tested was insignificant which only proves that they are equally usable by cyanobacteria which will use them instead of transforming one of its cells to heterocyst thus not performing nitrogen fixation. Results also revealed the massive growth of heterotrophic bacteria in presence of nitrogenous compounds. This indicates that the presence of nitrogenous compounds in fields in which nitrogen-fixing cyanobacteria are to be used as biofertilizers can be inhibitory for nitrogen fixation and stimulatory for heterotrophic bacterial growth which could be pathogenic and harmful to plants. The use of more nitrogen-fixing cyanobacteria with the minimum amount of nitrogenous compounds is recommended.

EFFECTS OF NITROGEN SOURCES AND ORGANIC MATTER ON NITROGEN FIXATION AND YIELD OF SOYBEANS

1972 ◽  
Vol 52 (6) ◽  
pp. 991-996 ◽  
Author(s):  
H. S. JOHNSON ◽  
D. J. HUME
Keyword(s):  
Organic Matter ◽  
Nitrogen Fixation ◽  
Seed Yield ◽  
Inorganic Nitrogen ◽  
Nitrogen Sources ◽  
Cattle Manure ◽  
Control Treatment ◽  
Available N ◽  
Corn Cobs ◽  
Ground Corn

The effects of two sources of nitrogen and ground corn cobs, applied either alone or in combination, on nitrogen fixation and seed yield of Glycine max (L.) Merr. cult Altona were investigated in an area where control plants fixed only 7.5 kg N2/ha. Treatments were: N, 280 kg N/ha as NH4NO3; organic matter (O.M.), 14 T (dry wt)/ha of ground corn cobs as an organic matter source; N + O.M.; M1; 88 T/ha of liquid cattle manure; M1 + O.M.; M2, 176 T/ha of liquid cattle manure; M2 + O.M.; and C, control. Treatment effects on nitrogen fixation, measured as acetylene reduction rates, and seed yield were related to the levels of available N supplied to the plants. Nitrogen fixation was progressively increased by treatments M1, M2 + O.M., M1 + O.M., and O.M., with the latter two fixing seven times as much nitrogen as the control. Final seed yield, however, was increased by treatments supplying the highest levels of inorganic nitrogen to plants, with N and N + O.M. producing higher yields than the control plots.

Nitrogen fixation by a marine non-heterocystous cyanobacterium requires a heterotrophic bacterial consort

2010 ◽  
Vol 12 (5) ◽  
pp. 1185-1193 ◽  
Author(s):  
Zhongkui Li ◽  
Jingjie Yu ◽  
Kyoung-Rae Kim ◽  
Jerry Brand
Keyword(s):  
Nitrogen Fixation ◽  
Heterocystous Cyanobacterium
Sign in / Sign up

Export Citation Format

Share Document