Anatomical and Phenotypic Study of Dianthus amurensis L. and Zinnia elegans by the effect of aqueous extracts of leaves Myrtus and Mentha

Abstract

The study includes an experiment conducted in a greenhouse of the College of Science/Mosul University to study allelopathic effects of aqueous extract for myrtle and mint that preparation at 5%w:v in growth and anatomical characters.

Results show decrease in germination percentage of Dianthus amurensis L. and Zinnia elegans when treated with aqueous extract of mint amounted to (12.5,36.14%), when treated with mint extract caused increase in (shoot height, root system length, and dry weight of seedlings as well as an increase in leaf area of Dianthus amurensis L. that (27.11, 28.57,  6.42 and 48.74%) while the aqueous extract of mint caused a reduction in germination percentage, shoot height and root length of Zinnia elegans that( 5.88,23.91%)  .As will the result anatomically shows that a reduction in stomata number in all treatments, high percentage reducing (56%) in Dianthus amurensis by effect Myrtle increases in stomata index, stomata density, and length of stomata in Dianthus amurensis L. leaves by the effect of mint aqueous extract that (39.13, 49.98 and 20%) . found significant differences in the studied characteristics of the cross section, as the aqueous extracts of Myrtle and mint caused an increase in the diameter of the section for Dianthus amurensis and was accompanied by an increase in the length of the shoots of plants treated with mint extract