Table 2.

Comparison of relative abundance (%) of bacterial phyla between control diet and rhubarb treatment.

Fraction	Diet	Age (d)		SEM1	Significance (P<)2
		50	60		Diet	Age	Diet × Age
PROTEOBACTERIA
RS	C3	11.67	3.71	0.178	<0.05	NS	<0.05
	R4	4.59	2.58
RL	C	13.83	4.12			NS
	R	13.55	6.90
RP	C	10.33	1.20			<0.05
	R	3.72	2.10
RE	C	56.37a	26.13			NS
	R	22.49b	24.24
FIRMICUTES
RS	C	41.85	55.70	0.071	NS	<0.05	<0.05
	R	51.36	61.40
RL	C	41.06	61.69			<0.01
	R	29.88	49.24
RP	C	46.87	73.44			<0.05
	R	57.84	61.85
RE	C	23.55b	44.86			NS
	R	50.01a	52.46
BACTEROIDETES
RS	C	30.66	18.92	0.103	NS	<0.05	NS
	R	30.01	20.37
RL	C	29.96b	10.69			<0.01
	R	47.19a	17.71
RP	C	25.52	6.20			<0.01
	R	26.41	9.66
RE	C	11.88	15.55			NS
	R	17.49	11.08
FIBROBACTERES
RS	C	1.03	0.11	0.024	NS	NS	NS
	R	0.06	0.06
RL	C	1.06	0.07			NS
	R	0.45	0.92
RP	C	0.51	0.12			NS
	R	0.05	0.03
RE	C	0.17	0.13			NS
	R	0.09	0.18
SPIROCHAETAE
RS	C	4.53	2.97	0.010	NS	<0.05	NS
	R	4.21	3.03
RL	C	2.96	1.05			<0.05
	R	2.50	1.15
RP	C	1.14	0.16			<0.01
	R	0.95	0.23
RE	C	1.23	2.88a			NS
	R	1.36	0.91b
ACTINOBACTERIA
RS	C	2.52	4.49	0.032	NS	NS	NS
	R	2.89	2.57
RL	C	0.94	0.43			NS
	R	0.82	0.41
RP	C	3.87	1.10			<0.05
	R	2.36	1.10
RE	C	2.28	3.49			NS
	R	4.47	2.53
SYNERGISTETES
RS	C	6.90	13.62	0.168	NS	NS	NS
	R	4.97	9.00
RL	C	9.17	21.10			<0.01
	R	4.17	18.75
RP	C	10.94	17.52			NS
	R	6.94	22.64
RE	C	4.28	6.63			NS
	R	2.97	7.62

^{a, b}Means within a column for diets that do not have a common superscript differ (P <0.05).

¹SEM for diet × age;

²NS, not significant (P > 0.05);

³C, Control diet;

⁴R, Rhubarb treatment.