Abstract
To clarify the growth differences between diploid and tetraploid Anthurium andraeanum ‘Pink Champion’ seedlings, their
leaves, stomata, petioles, roots, root hairs, and anatomy were compared. The results showed that tetraploids had reduced leaf
length, petiole length, and plant height but increased leaf width, petiole width, and stomatal length, with thicker leaf
structures respectively. Tetraploid petioles, leaves, and roots had larger cross-sections and cell volumes. Root traits varied;
tetraploids had decreased root number, total root length, and root hair growth rate, but increased root diameter, root area, root
hair diameter, and root activity, along with higher root fresh weight and root-shoot ratio. Diploids were slender and tall,
tetraploids robust and short. These indicators aided preliminary screening and cultivar selection.
