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

Table 2

𝑃>𝐹 for percent reduction in height and dry weight of 15 Palmer amaranth accessions 30 days after emergence^a.

Treatment factors	Height	Dry weight
	𝑃 value
Individual Palmer amaranth accessions^b
Accession	<0.0001	<0.0001
Drought stress	<0.0001	<0.0001
Accession × drought stress	0.0173	<0.0001
Coefficient of variation (%)	105	82
Palmer amaranth accessions grouped by response to herbicide^c
Accession group	0.0733	0.0060
Drought stress	<0.0001	<0.0001
Accession group × drought stress	0.6892	0.3886
Coefficient of variation (%)	108	87

^aData are pooled over experiments.
^bConsists of fifteen Palmer amaranth accessions.
^cConsists of a group of 5 acetolactate synthase-inhibitor susceptible and glyphosate-susceptible (ALSS/GS), a group of 5 acetolactate synthase inhibitor-resistant (ALSR), and a group of 5 glyphosate-resistant (GR) Palmer amaranth accessions.