Nitrogenase activity of blue-green algae on seasonally flooded soils in Bangladesh

1989 ◽  
Vol 113 (1) ◽  
pp. 47-52 ◽  
Author(s):  
J. A. Rother ◽  
B. A. Whitton
Keyword(s):  
Green Algae ◽  
Nitrogenase Activity ◽  
Flooded Soils ◽  
Blue Green Algae ◽  
Seasonally Flooded

Detection of denitrification, by a 15N racer technique, of nitrogen released from azolla and blue-green algae in a flooded soil

Soil Research ◽  
1985 ◽  
Vol 23 (2) ◽  
pp. 245 ◽  
Author(s):  
MH Mian
Keyword(s):  
Ammonium Sulfate ◽  
Green Algae ◽  
Total Nitrogen ◽  
Sodium Nitrate ◽  
Nostoc Muscorum ◽  
Flooded Soil ◽  
Flooded Soils ◽  
Mineral N ◽  
Treated Soil ◽  
Blue Green Algae

Denitrification of nitrogen from applied NH4+ and NO3-, and nitrogen released from Azolla caroliniana, Anabaena variabilis and Nostoc muscorum, was studied in a flooded soil. Denitrification did not occur in Azolla-, Anabaena-, Nostoc- or ammonium sulfate-treated soil, incubated at 18� to 25�C, until after 30 days since time was required to develop a surface-oxidized layer where nitrification could first take place. About 32, 45 and 49% of the total nitrogen in Azolla, Anabaena and Nostoc was released as mineral-N in 60 days, with 96, 93 and 93% respectively of this being lost as N2. Thus potentially serious losses of nitrogen from Azolla and blue-green algae may be avoided if their incorporated residues in flooded soils are left no longer than 3 weeks before planting a rice crop. Denitrification started within 3 days of incubation in the sodium nitrate-treated soil. About 10 and 75% of the ISN applied as ammonium sulfate and sodium nitrate, respectively, was lost as N, in 60 days. In addition, a substantial amount of 15N+4- N was formed from the applied 15NO-3-N (about 9% of the total amount added) in 60 days, indicating that a dissimilatory pathway also existed in this soil.

Nitrogenase Activity in Heterocysts of Blue–Green Algae

Nature ◽  
1969 ◽  
Vol 224 (5216) ◽  
pp. 226-228 ◽  
Author(s):  
W. D. P. STEWART ◽  
A. HAYSTEAD ◽  
H. W. PEARSON
Keyword(s):  
Green Algae ◽  
Nitrogenase Activity ◽  
Blue Green Algae

Nitrogenase activity in extracts of heterocystous and non-heterocystous blue-green algae

1970 ◽  
Vol 74 (3) ◽  
pp. 235-243 ◽  
Author(s):  
A. Haystead ◽  
R. Robinson ◽  
W. D. P. Stewart
Keyword(s):  
Green Algae ◽  
Nitrogenase Activity ◽  
Blue Green Algae

Nitrogenase activity, amino acid pool patterns and amination in blue-green algae

Planta ◽  
1972 ◽  
Vol 108 (2) ◽  
pp. 133-145 ◽  
Author(s):  
M. W. N. Dharmawardene ◽  
W. D. P. Stewart ◽  
S. O. Stanley
Keyword(s):  
Amino Acid ◽  
Green Algae ◽  
Nitrogenase Activity ◽  
Amino Acid Pool ◽  
Blue Green Algae ◽  
Acid Pool
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