تأثير مضادات الأكسدة في مستخلص نبات البردقوش .Origanum Majorana L على معدل انقسام خلايا جذر نبات الفول Vicia Faba L. النامي تحت ظروف الجفاف

الملخص EN

This study was conducted to investigate the effect of different concentrations of Origanum majorana, rich in antioxidants, on Vicia faba plants grown under drought stress.

The study was started with a two-week preliminary experiment under laboratory conditions to determine the field capacity of the soil and the amount of water suitable for the plant requirements as well as the quantity of water causing dryness for the plants grown in a pot that contains 300 g of soil, and to determine the appropriate amount of water that should be used to cause drought.

The drought experiment was then started by preparing two sets of V.

faba plants.

In the first set, seeds were immersed for 24 hours with Origanum majorana extract concentrations of (5-10-15 g /100 ml).

In the second one, seeds were irrigated with the same extract concentrations causing dryness, determined from the preliminary experiment.

The experiment lasted 28 days and the results (stem length, root length, area and number of leaves, chlorophyll content, wet and dry weight of the stem and root) were observed.

Plant height, number, area and chlorophyll content of leaves, as well as the dry and wet weight of the plants treated by immersion in the extract were higher than those subjected to the irrigation treatment.

The later ones were in turn higher than in case of the positive control plants.

Also, the mitotic index (MI) was calculated to determine the rate of cell division of the roots treated with the extract (by both irrigation and immersion methods) and compared with that of the control.