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Uma Rani, V.
- Morphology and Taxonomy of Oscillatoria princeps Vaucher Ex Gomont (Oscillatoriales, Oscillatoriaceae)
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Authors
Affiliations
1 Dept of Plant Biology and Plant Biotechnology, Guru Nanak College, Chennai 600042, IN
1 Dept of Plant Biology and Plant Biotechnology, Guru Nanak College, Chennai 600042, IN
Source
Indian Journal of Education and Information Management, Vol 5, No 1 (2016), Pagination: 1-5Abstract
Background: Oscillatoria princeps has been reported from various parts of India for its diversity but not studied in detail about morphology and reproduction hence we try to fill that lacuna.
Methods: Samples were collected from a stream near Kanyakumari district, Tamil Nadu. One part was preserved in 4% formalin, while the other part was brought to unialgal culture by streaking method. The cultures were grown and maintained in ASN III (-NaCl) medium at the photoperiodic culture racks with 8 hours light and 16 hours dark. Semi-permanent slides were prepared and Leica EC3 Microsystems was used for observation and documentation.
Findings: The alga was dark blue green in colour, growing in clusters at the bottom of the stream. Individual filaments were blue green to olive green in colour. Mature trichome straight, cells much broader than long with distinct cross walls. Apical cells hemispherical with keritomized content. Individual cells were round in shape and the size varies from 57.60μm to 69.05μm in width and 5.20μm to 9.55μm in length thus the ratio of length and breadth as 1:8. When such cells were stacked one above the other it gives "stack of poker chips" appearance, characteristic feature of the species. Notches were found at the inner side of the cell corresponding to the slit on the trichome. When such cells were stacked one above the other, it results in the crack like appearance on the trichome. One to three notches/slits were observed in the present study. Reproduction both by fragmentation and hormogonia (formation of separation disc) was observed.
Application/Improvements: The new finding like cracks/ slit like structure on trichome can be taken for further studies. The microphotographs will enable the researchers to have better understanding.
Keywords
Cyanobacteria, Oscillatoria princeps, Kanyakumari, BGA, Hormogonia and Necridia.Full Text
References
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- Security Issues and Challenges in Wireless Sensor Networks
Abstract Views :139 |
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Authors
Affiliations
1 Computer Science and Engineering Department of Jaya Engineering College, Thiruninravur, Chennai-62, Tamil Nadu, IN
2 Computer Science and Engineering Department of Prathyusha Institute of Technology and Management, Chennai, IN
1 Computer Science and Engineering Department of Jaya Engineering College, Thiruninravur, Chennai-62, Tamil Nadu, IN
2 Computer Science and Engineering Department of Prathyusha Institute of Technology and Management, Chennai, IN
Source
Wireless Communication, Vol 3, No 15 (2011), Pagination: 1030-1035Abstract
Wireless sensor networks are one kind of distributed ad hoc networks used to provide a wireless communication infrastructure among the sensors deployed in a specific application domain. Sensor network is based on broadcast wireless medium susceptible to variety of attacks. Due to their characteristics such as small memory, limited energy resources, low computation capability, susceptibility to physical capture, and the use of insecure wireless communication channels make security in wireless sensor network as a challenging one. This paper, we discusses sensor network architecture, the major security issues and challenges in wireless sensor networks, their defense mechanisms, and security protocols and used to counter the issues.Keywords
Attack, Protocol, Security, Sensor Network.
- Protective Effect of Pueraria tuberosa Linn. in Arsenic Induced Nephrotoxicity in Rats
Abstract Views :215 |
PDF Views:5
Authors
Affiliations
1 Malla Reddy College of Pharmacy, Maisammaguda, Dhulapally, Secunderabad, Affiliated to Osmania University, Telangana, IN
2 Vishnu Institute of Pharmaceutical Education and Research, Narsapur, Telangana, IN
1 Malla Reddy College of Pharmacy, Maisammaguda, Dhulapally, Secunderabad, Affiliated to Osmania University, Telangana, IN
2 Vishnu Institute of Pharmaceutical Education and Research, Narsapur, Telangana, IN