Manar Alreyahi * (1) , Saleh Koubili (1), Majd Darwish(1) and Nizar Moalla(1)
(1). Tishreen University, Lattakia, Syria.
(*Corresponding author: Manar alreyahi, E-Mailm33manarm@gmail.com phone:0932166690 ).
Received:13/8/2023 Accepted: 24/10/2023
Abstract:
The research was carried out in the laboratories of the Faculty of Agricultural Engineering – Tishreen University, the Tobacco Research Center (Jableh) and the laboratories of the Atomic Energy Commission in Damascus. Seeds of two tobacco varieties (Baladi (Shak Al-Bent) and Virginia) were exposed to five levels of gamma radiation(0-100-200-300-400gy), To study the effect of gamma radiation treatment on the length, width, Length / Width ratio and area of middle leaf and plant yield of green leaves. The results showed the positive effect of treatment with dose (100 gy) of gamma radiation on all studied traits, The green leaf length increased from (29.15 cm) and (47.32 cm) in the control treatment for both the Baladi and Virginia cultivars to (31.87 cm) and (53.72 cm), respectively, The same treatment also increased the width of the leaf to (13.7 cm) and (27.61 cm) in the two varieties, compared to (13.2 cm) and (24.7 cm) in the control treatment. The green leaf area increased in both studied cultivars from (275.4 cm2) and (750.7 cm 2) in the control treatment to (316.77 cm2) and (948.74 cm 2) in the treatment (B = 100 gy), which also gave the highest yield of green leaves (384 g). for Baladi and (1820g) for Virginia compared to the control and other treatment. Increasing dose of gamma radiation had a negative effect on all studied traits, The leaf length decreased to (19.8 cm) in Baladi and (34.05 cm) in Virginia. As well as , the leaf width decreased to (8.5 cm) in Baladi and (17.57 cm) in Virginia. The green leaf area decreased to (116.24 cm2) in Baladi and (386.24 cm2) in Virginia, as well as the plant productivity of green leaves reached the lowest value (196.5g) in Baladi and (415g) in Virginia when treated with the high dose (E=400 gy). We recommend using low doses of gamma rays as a growth and production stimulant
Keywords: Nicotiana tabacum, Gamma rays, Yield, leaf area.
Full paper in Arabic: pdf