Jennifer A. Schweitzer, Joseph K. Bailey, Dylan G. Fischer, Carri J. LeRoy, Eric V. Lonsdorf, Thomas G. Whitham, and Stephen C. Hart. 2008. Plant–soil microorganism interactions: heritable relationship between plant genotype and associated soil microorganisms. Ecology 89:773–781.

Appendix A. A table listing the identified phospholipid fatty acid (PLFA) biomarkers found in the soil samples.

TABLE A1. A list of specific phospholipid fatty acid (PLFA) biomarkers used in the bacteria:fungi ratios. The fatty acid notation follows standard nomenclature.

Taxonomic category	PLFA	Reference
General bacteria	i15:0	O'Leary and Wilkinson (1988)
	a15:0	O'Leary and Wilkinson (1988)
	15:0	Frostegård and Bååth (1996)
	i16:0	O'Leary and Wilkinson (1988)
	16:19	Wilkinson (1988)
	17:0	Frostegård and Bååth (1996)
	cy17:0	Wilkinson (1988)
	cy19:0	Wilkinson (1988)
Gram positive bacteria	i15:0	O'Leary and Wilkinson (1988)
	a15:0	O'Leary and Wilkinson (1988)
	i16:0	O'Leary and Wilkinson (1988)
	10Me16:0	O'Leary and Wilkinson (1988)
	i17:0	O'Leary and Wilkinson (1988)
	a17:0	O'Leary and Wilkinson (1988)
Gram negative bacteria	cy17:0	Frostegård and Bååth (1996)
	16:19	Frostegård and Bååth (1996)
	cy19:0	Frostegård and Bååth (1996)
Fungi	18:26	Wilkinson (1988)

LITERATURE CITED

Frostegård, A., and E. Bååth 1996. The use of phospholipid analysis to estimate bacterial and fungal biomass in soil. Biology Fertility of Soil 22:59–65.

O’Leary, W. M., and S. G. Wilkinson. 1988. Gram positive bacteria. Pages 117–202 in C. Ratlidge and S. G. Wilkinson, editors, Microbial lipids Vol. 1. Academic Press, London, UK.

Wilkinson, S. G. 1988. Gram negative bacteria. Pages 299–488 in C. Ratlidge and S. G. Wilkninson, editors. Microbial lipids Vol. 1., Academic Press, London, UK.