Rima Ghafari*(1), Najwa Mouslemanie (1), Abdullah Katta (2) and Imad-Aldeen Alkhalaf (1)
(1). Dept. of Botany, Faculty of Science, Aleppo University, Syria
(2). Dept. of Chemistry, Faculty of Science, Aleppo University, Syria
(* corresponding author: Rima Ghafari, mail: mirago82@yahoo.com)
Received: 23/03/2021 Accepted: 4/07/2021
Abstract
This research aimed to determine the red laser (He-Ne) irradiation effect with wavelength (635) nm and capacity (5) mWat/ cm2 on seed germination parameters of sesame (Sesamum indicum), the research took place at the laboratory of plant ecology and pollution, the laboratory of Nano science (7) and the ecology garden, faculty of science, university of Aleppo, between June and July 2020. the seeds were divided into two main groups, the first group containing the dried seeds which were irradiated for graduated periods (1,5,10,15) min. the second group of seeds were soaked in water for (3) hours and irradiated with the red laser for the same time as dried seeds, then both groups were transferred to sterile petri dishes (9) cm containing two wet Whatman papers, After (14) days of the experiment the seedling parameters such as germination percentage and mean germination time, length and weight of seedling shoots and roots were measured respectively. The results showed that the highest germination percentage was for dry sesame seeds irradiated for (5) min (92%) compared to the control seeds (83%). While the highest value for the mean germination time was observed when the dried seeds irradiated for (15) min with a result of (0.92 seed/day) compared to the control seeds (1.62 seed/day). The results of Sesamum indicum shoot and root lengths and weights showed that the significant statistical differences were notable at 15 min of laser irradiation compared to the rest of irradiation periods, the results also showed that the dried seeds of sesame were more affected by the red laser irradiation than the pre-soaked seeds. It can be concluded that the red laser irradiation had enhanced the Sesamum indicum seedling parameters.
Keywords: Laser, seed germination parameters, Sesamum indicum.
Full paper in Arabic: pdf