Blue-green algae from rice fields in Kerala State, India

Hydrobiologia ◽  
1987 ◽  
Vol 144 (3) ◽  
pp. 223-232 ◽  
Author(s):  
N. Anand ◽  
R. S. Shantha Kumar Hopper
Keyword(s):  
Green Algae ◽  
Rice Fields ◽  
Blue Green Algae ◽  
Kerala State

Isolation and taxonomy of the blue-green algae (Cyanobacteria), Nostoc and Anabaena in Kerala State, India

2020 ◽  
Vol 62 (1-2) ◽  
pp. 163-174
Author(s):  
T. S. Thilak ◽  
P. V. Madhusoodanan ◽  
N. S. Pradeep ◽  
R. Prakashkumar
Keyword(s):  
Green Algae ◽  
Pure Culture ◽  
Paddy Fields ◽  
Atmospheric Nitrogen ◽  
Nitrogen Fixing ◽  
Blue Green Algae ◽  
Heterocystous Cyanobacteria ◽  
Pure Cultures ◽  
Photosynthetic Microorganisms ◽  
Kerala State

Blue-green algae (also called cyanobacteria) are ubiquitous, pristine and pioneer photosynthetic microorganisms. Many species of cyanobacteria are capable of fixing atmospheric nitrogen and such species in wet soils are simultaneously augmenting the fertility of the soil, acting as natural bio-fertilizers. Nostoc and Anabaena are the two important genera of heterocystous cyanobacteria capable of contributing nitrogen to soil, especially in paddy fields. The major objectives of the investigation included survey, collection, isolation and pure culture of nitrogen-fixing species of Cyanobacteria in the soils of Kerala state, India. Altogether, pure cultures of 12 species of Nostoc and 5 species of Anabaena are prepared.

scholarly journals Rice Field Blue-green Algae of Bongaigaon District, Assam

Our Nature ◽  
1970 ◽  
Vol 8 (1) ◽  
pp. 357-359
Author(s):  
A.K. Das ◽  
G.C. Sarma
Keyword(s):  
Green Algae ◽  
Rice Field ◽  
Single Species ◽  
Rice Fields ◽  
Blue Green Algae

The present study deals with the blue-green algae (BGA) from the rice fields of Bongaigaon district, Assam. 23 species of blue-green algae belongs to 12 genera has been enumerated. Maximum species were found under the genus Nostoc (4), Anabaena (4), which is followed by Scytonema (3) Aphanocapsa (2), Aphanothece (2) and Phormedium (2). Single species was represented by the genera Microcystis, Chroococcus, Merismopedia, Oscillatoria, Aulosira and Calothrix.DOI: 10.3126/on.v8i1.4344

scholarly journals The role of blue-green algae in nitrogen fixation in rice-fields

1939 ◽  
Vol 127 (846) ◽  
pp. 121-139 ◽  
Keyword(s):  
Nitrogen Fixation ◽  
Soil Temperature ◽  
Green Algae ◽  
Rice Fields ◽  
Harvest Time ◽  
Dry Period ◽  
Blue Green Algae

The problem, with which this paper deals, arose out of the observation that in India rice can be grown on the same land for long periods without the addition of manure to the soil (Howard 1924, p. 114). Three distinct periods are distinguishable in Indian rice fields, viz.: (1) Waterlogged period (from transplantation up to harvest time), in which there are a few inches to several feet of water above the soil and which is distinguished by the growth of abundant algae. (2) The dry period, which follows in winter after harvest and during which conditions remain very suitable for microbiology activity. (3) The desiccation period, commencing after winter when the soil temperature frequently exceeds 50° C.

The abundance of heterocystous blue-green algae in rice soils and inocula used for application in rice fields

1987 ◽  
Vol 5 (2) ◽  
Author(s):  
P.A. Roger ◽  
S. Santiago-Ardales ◽  
P.M. Reddy ◽  
I. Watanabe
Keyword(s):  
Green Algae ◽  
Rice Fields ◽  
Rice Soils ◽  
Blue Green Algae

Freeze-Fracture Replication in the Ultrastructure of Blue-Green Algae

1967 ◽  
Vol 25 ◽  
pp. 74-75
Author(s):  
L. V. Leak
Keyword(s):  
Cell Wall ◽  
Electron Microscope ◽  
Green Algae ◽  
Three Dimensional ◽  
Freeze Fracture ◽  
Electron Microscopic ◽  
Photosynthetic Membranes ◽  
Blue Green Algae ◽  
Cell Biol ◽  
Cellular Components

Electron microscopic observations of freeze-fracture replicas of Anabaena cells obtained by the procedures described by Bullivant and Ames (J. Cell Biol., 1966) indicate that the frozen cells are fractured in many different planes. This fracturing or cleaving along various planes allows one to gain a three dimensional relation of the cellular components as a result of such a manipulation. When replicas that are obtained by the freeze-fracture method are observed in the electron microscope, cross fractures of the cell wall and membranes that comprise the photosynthetic lamellae are apparent as demonstrated in Figures 1 & 2.A large portion of the Anabaena cell is composed of undulating layers of cytoplasm that are bounded by unit membranes that comprise the photosynthetic membranes. The adjoining layers of cytoplasm are closely apposed to each other to form the photosynthetic lamellae. Occassionally the adjacent layers of cytoplasm are separated by an interspace that may vary in widths of up to several 100 mu to form intralamellar vesicles.

Peculiarities of Energetic, Nitrogen, and Phosphorus Metabolism in Blue-Green Algae under the Influence of Humic Acids

2008 ◽  
Vol 44 (6) ◽  
pp. 74-82
Author(s):  
O. V. Sinyuk ◽  
V. V. Grubinko ◽  
P. D. Klochenko ◽  
T. A. Vasilchuk
Keyword(s):  
Green Algae ◽  
Humic Acids ◽  
Phosphorus Metabolism ◽  
Nitrogen And Phosphorus ◽  
Blue Green Algae
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