Table 3.

Significance of effects of yeast cell density (log-transformed) and its interaction with plant species on sugar composition parameters in the set of single-flower nectar samples studied, after statistically accounting for intrinsic differences between plant species and individuals

Nectar sugar composition parameter	Yeast cell density			Yeast cell density × plant species
	F	d.f.	P-value	F	d.f.	P-value
Concentration*
Fructose	5·96	1, 320	0·015	3·99	20, 320	<0·0001
Glucose	3·67	1, 320	0·056	4·30	20, 320	<0·0001
Sucrose	8·27	1, 320	0·0043	2·89	20, 320	<0·0001
All sugars	11·87	1, 320	0·0006	3·38	20, 320	<0·0001
Percentage of total sugar
Fructose	7·48	1, 320	0·0068	2·18	20, 320	0·0027
Glucose	2·89	1, 320	0·090	1·49	20, 320	0·0835
Sucrose	0·37	1, 320	0·54	1·32	20, 320	0·16

Analyses involved fitting linear mixed models to individual flower data (n = 498), with log-yeast cell density and its interaction with species as fixed effects and species and individuals as random effects (see Table 2 for results corresponding to random effects).

* Grams of solute per 100 mL of solution.