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@article{Hynniewta, Athokpam Pinokiyo*_2011, title={Nostoc cyanobiont in the Cyanolichen, Sticta weigelii of Eastern Himalayan Region: Isolation, Physiological and Biochemical Characterization}, volume={2}, url={https://www.updatepublishing.com/journal/index.php/jes/article/view/1879}, abstractNote={<p class="MsoListParagraph" style="margin: 6pt 0in 0pt; line-height: normal; text-align: justify; mso-add-space: auto;"><span style="font-size: 10pt; font-family: ";Arial Narrow";,";sans-serif";; mso-bidi-font-style: italic;" lang="EN-IN">A cyanobacterium identified as </span><em style="mso-bidi-font-style: normal;"><span style="font-size: 10pt; font-family: ";Arial Narrow";,";sans-serif";;" lang="EN-IN">Nostoc </span></em><span style="font-size: 10pt; font-family: ";Arial Narrow";,";sans-serif";;" lang="EN-IN">sp. was isolated from the cyanolichen, <em>Sticta weigelii </em>(Ach.) Vainio<span style="mso-bidi-font-style: italic;"> collected from tree barks in the state of Meghalaya and its various physiological and biochemical characters were evaluated. When the lichen thalli were incubated in liquid medium, </span>the <em style="mso-bidi-font-style: normal;">Nostoc </em>colonies from these thalli appeared initially in distinct sacs that released individual long heterocystous filaments into the liquid medium upon sub-culturing. The well spaced heterocystsin the filaments had a frequency of 7-8%. Chlorophyll <em style="mso-bidi-font-style: normal;">a</em> concentration of the cyanobacterium was higher in comparison to many other <em style="mso-bidi-font-style: normal;">Nostoc</em> species isolated from soil and water from the same region. Its photosynthetic activity was 519.24±0.7 nmol O<sub>2</sub> evolved µg<sup>-1 </sup>chl <em style="mso-bidi-font-style: normal;">a</em> h<sup>-1</sup> whereas respiration was 286.35±0.5 nmol O<sub>2</sub> consumed µg<sup>-1 </sup>chl <em style="mso-bidi-font-style: normal;">a</em> h<sup>-1</sup>. Enzyme assays reflected nitrogenase activity of 6.98 nmol C<sub>2</sub>H<sub>4</sub> produced µg<sup>-1 </sup>chl <em style="mso-bidi-font-style: normal;">a</em> h<sup>-1</sup> and GS transferase activity of 712±3.0 nmol γ-glutamyl hydroxymate formed min<sup>-1 </sup>mg<sup>-1</sup> protein. Nitrate reductase activity was substrate inducible. Ammonium uptake was biphasic in nature and glutamine uptake was energy dependent. </span></p>}, number={9}, journal={Journal of Experimental Sciences}, author={Hynniewta, Athokpam Pinokiyo*, Mayashree B. Syiem*, Luxemburgh}, year={2011}, month={Aug.} }