Table 1 Solutions applied to the A. cepa groups.

Control

Tap water

RP 1

0.5 g L⁻¹ R. pollinaria extract

RP 2

1.0 g L⁻¹ R. pollinaria extract

Al

50 mg L⁻¹ AlCl₃

AlRP 1

50 mg L⁻¹ AlCl₃ + 0.5 g L⁻¹ R. pollinaria extract

AlRP 2

50 mg L⁻¹ AlCl₃ + 1.0 g L⁻¹ R. pollinaria extract