Effect of clone selection, nitrogen supply, leaf damage and mycorrhizal fungi on stilbene and emodin production in knotweed

Table 1 Plant characteristics measured and tested in 2006 and 2007.

Experimental factors and their effect on plant characteristics - significance levels
Plant characteristics		Significance of factors and their interactions
	year	A	B	C	D	A*B	A*C	A*D	B*C	B*D	C*D	ABC	ACD	BCD	ABC*D
Aboveground		CLONE	INOC	N	LF DMG
Plant d.m. (g)	06, 07	0.001	NS	0.001	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
Plant height (cm)	06, 07	0.001	NS	0.001	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
Stem no	06, 07	0.001	NS	0.001	NS	NS	NS	NS	NS	NS	NS	NS	0.05	NS	NS
Branch no	06, 07	0.001	NS	0.001	NS	NS	0.001	NS	NS	NS	0.05	NS	NS	NS	NS
Branch total length (cm)	2006	x	x	x	x	x	x	x	x	x	x	x	x	x	x
Leaf no	06, 07	0.001	NS	0.001	NS	NS	NS	NS	NS	NS	0.01	NS	NS	NS	NS
Stem water content (%)	06, 07	0.001	NS	NS	NS	NS	NS	NS	NS	0.05	NS	NS	NS	NS	NS
Leaf water content (%)	06, 07	0.001	NS	0.001	0.05	NS	NS	NS	NS	NS	0.05	NS	NS	NS	NS
Leaf area (cm2)	06, 07	0.001	NS	0.001	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
SLA (cm2/g)	06, 07	NS	NS	0.01	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
Belowground
Root and rhizome d.m. (g)	2007	0.001	NS	0.001	0.05	NS	0.01	0.01	NS	NS	NS	NS	NS	NS	NS
N (%)	2007	0.001	0.001	0.001	0.001	0.001	0.001	0.001	NS	NS	NS	0.05	NS	NS	NS
C (%)	2007	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
Resveratrol (mass %)	2007	0.001	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	x
Piceid (mass %)	2007	0.001	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	x
Stilbenes (mass %)	2007	0.001	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	x
Emodin (mass %)	2007	0.001	NS	0.01	NS	NS	NS	NS	NS	NS	NS	0.05	0.05	NS	x
Infection rate M (%)	2007	0.001	x	NS	0.05	x	NS	0.01	x	x	NS	x	NS	x	x
Infection rate F (%)	2007	0.001	x	NS	0.05	x	NS	NS	x	x	NS	x	NS	x	x

Results of four-way ANOVA with the following factors: CLONE = knotweed clone; INOC = mycorrhizal inoculation; N = nitrogen level; LF DMG = leaf damage. Shown for data from 2007.
x = non-tested, NS = non-significant

ISSN: 1471-2229