Phylogenetic analysis of red like cbbL clones. A composite neighbour joining tree (Jukes-Cantor correction) was constructed from aligned nucleotide sequences (phylotypes) of form IC cbbL-gene obtained from agricultural soil ‘AS’ and barren saline soils ‘SS1 & SS2’ with closely related cbbL-gene sequences from known organisms and environmental clones. Bootstrap values are shown as percentages of 1000 bootstrap replicates. The bar indicates 5% estimated sequence divergence. One representative phylotype is shown followed by phylotype number and the number of clones within each phylotype is shown at the end. Clone sequences from this study are coded as ‘BS’ (AS), ‘HS’ (SS1) and ‘R’ (SS2). The cbbL-gene sequences of the isolates from this study are denoted as ‘BSC’, ‘HSC’ and ‘RSC’ from AS, SS1 and SS2 respectively. The green-like cbbL-gene sequence of Methylococcus capsulatus was used as outgroup for tree calculations.