By T. A. Sarma

This guide acquaints readers with the fascinating advancements in a number of parts of cyanobacterial learn within the backdrop of the booklet of whole genome series of the cyanobacterium Synechocystis sp. pressure PCC 6803 in 1996. It starts with a precis of the present wisdom at the taxonomy, phylogeny and evolution of cyanobacteria through the sequenced genomes, differentiation of akinetes and heterocyst. The booklet considers mechanisms of mobile events (gliding, swimming and twitching motions) exhibited via quite a few cyanobacteria with a purpose to comply with their environmental niches and the operation of the circadian rhythms. It covers cyanobacterial symbiosis, cyanophages and cyanobacterial pollutants, through a dialogue on rigidity responses (salinity, temperature, desiccation and oxidation). A accomplished account at the advancements in these types of spheres has been awarded in a lucid kind with the necessary historical past details, molecular thoughts hired and versions proposed. This instruction manual constitutes the 1st such ebook written by way of a unmarried writer at a degree and intensity for graduate and examine scholars in botany and microbiology.

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According to Robertson et al. (2001), Synechococcus sp. strain PCC 6716 and Synechococcus sp. strain PCC 6717 should be classified as members of a different genus from that of Synechococcus sp. strain PCC 6301. These may represent early morphological types of cyanobacteria and forerunners for the evolution of other cyanobacterial morphological types. In this connection, it is important to know that Synechococcus sp. strains PCC 6716 and PCC 6717 and S. elongatus (Toray) have been isolated from hotsprings.

Taxonomically, all strains possibly belong to Cyanothece according to Castenholz and Waterbury (1989) but Aphanothece or Cyanothece according to Anagnostidis and Komárek (1986). On the basis of NJ phylogenetic tree analysis all these strains are placed in a monophyletic cluster. This is the first group of cyanobacteria that are closely related with each other on the basis of 16S rRNA gene sequencing and a set of physiological characteristics. According to Wilmotte and Herdman (2001) this study ‘is a nice example of a polyphasic approach to the taxonomy of cyanobacteria’.

A web-based research tool for microbial community analysis was developed by Marsh et al. html). According to these workers, it is important to know (i) the type of restriction enzyme(s) that will provide the most discriminating activity for estimates of population diversity, (ii) the enzymes that will provide the best resolution for the best phylogenetic group and (iii) the particular primer-enzyme combination which will be optimal for the community under investigation. , 2001). , 2001). , 2001).

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