Ecology, Environment and Conservation Paper

Vol 27, Issue 2, 2021; Page No.(690-694)

EFFECT OF DIFFERENT MAGNESIUM OXIDE NANOPARTICLES CONCENTRATION ON THE GROWTH OF THE LYNGBYA MAJUSCULA

Dunia Bahel Gadaan Alghanimy and Haider A. Alghanmi

Abstract

This study evaluated the effect of different concentrations of magnesium oxide nanoparticles (MgO NPs) (37.5, 56.5, 75, 93.75, 112.5, 150) g/l in BG11 medium on blue green alga Lyngbya majuscula a species of filamentous cyanobacteria isolated from soil, on photosynthetic pigments and growth. The results showed that the increase of MgO NPs caused an increase in the growth and concentration of chlorophyll a, and carotenoids compared with the control group that gave higher concentrations of chlorophyll a, and carotenoid. Also, the genetic analysis showed matching the DNA sequences of cyanobacterium understudy with DNA sequences of species found in Gen Bank at a percentage of 99% which was Lyngbya majuscula CCAP 1446/ 4, the results of sequences deposited in Gen Bank of NCBI site with accession number MN567111.1.