Studies on the Preparation of Dried Inoculum of Blue-Green Algae and its Application in Paddy Field

The distribution pattern of blue-green algae was studied from paddy fields of Patan and Karad tehsils in relation to physico-chemical properties of soil, viz., pH, electrical conductivity, organic carbon %, available N, P, and K. Paddy field soil samples of 38 localities from Patan and 28 localities from Karad were analysed. One-hundred-and-thirty-seven species belonging to 35 genera of 10 families from three orders were encountered from paddy field soils of both the tehsils. Out of 66 soil samples 93.65% samples showed occurrence of unicellular, heterocystous and non heterocystous forms while 6.34% soil samples showed only non heterocystous forms. Anabaena and Oscillatoria were found to be of common occurrence. Significant variation was not observed in distribution pattern of blue-green algal forms in relation to physico-chemical properties during successive surveys.

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Formulations of BGA for Paddy Crop

Agroecosystems – Very Complex Environmental Systems ◽

10.5772/intechopen.92821 ◽

2021 ◽

Author(s):

Bagampriyal Selvaraj ◽

Sadhana Balasubramanian

Keyword(s):

Plant Growth ◽

Green Algae ◽

Paddy Field ◽

Control Plant ◽

Alluvial Soil ◽

Paddy Fields ◽

Agricultural Fields ◽

Blue Green Algae ◽

Significant Growth ◽

Paddy Crop

Blue green algae (BGA) are prokaryotic phototrophic organisms that can fix the atmospheric nitrogen biologically, and were directly applied as a biofertilizers in agricultural fields specifically Paddy field. Since they are having the ability to fix nitrogen, they are formulated with various adsorbents for the purpose of enhancing the crop growth along with maintaining the soil fertility and other soil factors responsible for productivity. The present study revealed that the formulations of blue green algae isolated from paddy fields of southern districts with different adsorbents like alluvial soil, sand, charcoal, and powdered paddy straw. All the adsorbents mixed with blue green algae showed significant growth when compared to the control plant. This determined that the adsorbent formulated mixed blue green algae enhanced the paddy plant growth under greenhouse condition.

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

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100060386 ◽

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.

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