Table 1.

Primers used for phylogenetic groups in this study

Marker	Primer direction	Primer sequence (5′-3′)	Product length (bp)
gadA	Forward Reverse	GATGAAATGGCGTTGGCGCAAG GGCGGAAGTCCCAGACGATATCC	373
ChuA	Forward Reverse	ATGATCATCGCGGCGTGCTG AAACGCGCTCGCGCCTAAT	281
yjaA	Forward Reverse	TGTTCGCGATCTTGAAAGCAAACGT ACCTGTGACAAACCGCCCTCA	216
TSPE4.C2	Forward Reverse	GCGGGTGAGACAGAAACGCG TTGTCGTGAGTTGCGAACCCG	152