Journal of Environmental Biology

Effect of fluoride pollution on genetic diversity

of a medicinal tree, Syzygium cumini

Author Details

Suphiya Khan

Deptt. of Bioscience and Biotechnology, Banasthali University, Banasthali Vidyapith - 304 022, India

Mamta Baunthiyal

Deptt. of Bioscience and Biotechnology, Banasthali University, Banasthali Vidyapith - 304 022, India

Alka Kumari

Deptt. of Bioscience and Biotechnology, Banasthali University, Banasthali Vidyapith - 304 022, India

Vinay Sharma

(Corresponding author)

Deptt. of Bioscience and Biotechnology, Banasthali University, Banasthali Vidyapith - 304 022, India

e-mail: vinaysharma30@yahoo.co.uk

Publication Data

Paper received:

13 December 2010

Revised received:

19 April 2011

Accepted:

25 May 2011

Abstract

Syzygium cumini Linn. (Myrtaceae) is a medicinal tree (Jamun) used worldwide in treatment of diabetes. However, no molecular data is available on genetic polymorphism and its relationship, if any with fluoride pollution. In the present study, the genetic variability of two populations of S. cumini growing in fluoride rich soils and normal soils located in Rajasthan and Haryana regions of India, respectively was determined using random amplified polymorphic DNA (RAPD) markers. Different measures of diversity in Rajasthan populations: Shannon?s index of phenotypic diversity (I) = 0.440; Nei?s genetic diversity (h) = 0.292; effective number of alleles per locus (Ne) = 1.497; total species diversity (Hsp) = 0.307 and within population diversity (Hpop) = 0.158 showed high diversity in comparison to Haryana populations. Thus, it seems that Rajasthan population responds with increased genetic variation resulting possibly from new mutation that affect allele frequencies as a consequence of adaptation to contaminated environment. This may imply that the increased diversity levels may act as a buffer to combat fluoride stress. Cluster analysis and principal component analysis (PCA) results showed mixing between the populations. ?

Key words

Fluoride; Genetic diversity, RAPD, Syzygium cumini

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