تأثير أشعة جاما في نمو أربعة أصناف من البطاطا (Solanum tuberosum L.)‎ المكثرة داخل الأنابيب : 1- التأثير في ارتفاع النبات و عدد الأفرع و الأوراق (ملحوظة علمية)‎

Abstract EN

The radio sensitivity of potato varieties was determined in vitro following doses of gamma radiation (0, 5, 10, 20, 30, 40, 50, 60 Gray). After six weeks, the percentage of partial or complete killing of propagated plants was calculated.

The results showed that the dose 60 Gray caused complete death for all propagated plants and was considered as the Lethal Dose (LD- 100), while the dose 30 Gray caused death up to 50% of the propagated plants and was considered as the LD- 50, and the most suitable dose causing genetic variation.

Vegetative parts of irradiated plants with doses of (0, 5, 10, 20, 30, 40, Gray) were cultured on the same propagation medium to study the effect of gamma radiation on their total growth. Six weeks later, the following parameters were investigated: average of plant height, average number of branches and average number of leaves of vegetative parts of each plant.

Results showed that the response of potato plants was affected by the variety and dose of exposure which revealed significant reduction in the average of most studied characteristics as the dose of gamma radiation increased.

Average plants height of Marfona variety was significantly higher than the other varieties (7.26 cm).

The dose 30 Gray caused an increase in the average number of plant branches.

Results also showed a reduction in the average number of leaves at dose 40 Gray for all varieties.