Response of Herbicide-Resistant Palmer Amaranth (Amaranthus palmeri) Accessions to Drought Stress

Table 5

Percent reduction in height and dry weight 30 days after emergence and slopes of regression lines for percentage of reduction in height of 15 Palmer amaranth accessions when accessions were grouped as acetolactate synthase inhibitor-susceptible and glyphosate-susceptible (ALSS/GS), acetolactate synthase inhibitor-resistant (ALSR), and glyphosate-resistant (GR)^a.

Accession grouping	Height	Dry weight	Slope
	% reduction plant^−1		% reduction day^−1
ALSS/GS	12 a	23 a	4.0 a
GR	10 b	20 b	4.5 a
ALSR	10 b	20 b	4.1 a

^aData are pooled over experiments and duration of drought stress. Means within a parameter followed by the same letter are not significantly different according to Fisher’s protected LSD test at 𝑃≤0.10.