IAMURE Internaional Journal of Ecology and Conservaion 158 Phytochemical, Nutritive, Cytotoxic and Antibacterial Analysis of Tabtaba Species (Nostoc linckia) of Lingas Baay Abra, Philippines NERO M. PADERES http://orcid.org/0000-0002-9375-2839 neropaderes37@gmail.com Abra State Institute of Sciences and Technology Abra, Philippines Gunning Fog Index: 11.85 Originality: 95% Grammar Check: 97% Flesch Reading Ease:43.29 Plagiarism: 5% ABSTRACT he phytochemical, nutritive, cytotoxic and antibacterial analysis of Tabtaba (Nostoc linckia) species found in Lingas Baay Abra which is commonly eaten as an exotic dish was investigated using diferent laboratory assays. Phytochemical and nutritive analysis show the presence of carbohydrates, reducing sugars, phytosterol, phenolics, lavonoids, crude fats and proteins. Cytotoxic and genotoxic analysis of crude extract concentrations of 2.5 mg/ml, 5 mg/mL and 10 mg/ml that were tested on root meristems of A. cepa. showed that root length and mitotic index decreased as the concentrations of Tabtaba extract increased. A concentration-dependent increase in chromosome aberrations was also observed. Ethanol extract concentrations of 75%, 50% and 25% that were tested against S.aureus and E.coli showed that Tabtaba ethanolic extracts have strong antibacterial activity towards S.aureus but weak against E.coli. his study proved that the Tabtaba (Nostoc linckia) species found in Lingas Baay Abra showed Vol. 16 · October 2015 Print ISSN 2244-1573 · Online ISSN 2244-1581 Internaional Peer Reviewed Journal doi: htp://dx.doi.org/10.7718/ijec.v16i1.1023 Journal Metrics: H Index = 2 from Publish or Perish This journal is included in Thomson Reuters Journal Masterlist Published by IAMURE Mulidisciplinary Research, an ISO 9001:2008 ceriied by the AJA Registrars Inc.