| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:31 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Biophysics and Medical Physics;Electricity and Magnetism
Title:
Microwave influence on plant seedlings during early ontogenetic stages
Authors:
Burghelea Ionica, Fl. M. Tufescu, D.E.Creanga
Affiliation:
Univ. Al. I. Cuza Iasi, Faculty of Physics
E-mail
mdor@uaic.ro
Keywords:
non-thermal microwaves, plant seedlings, chlorophyll ratio
Abstract:
The biological impact of low power demsity microwaves (MW) was investigated on two plant species: wheat and rye. The exposure device was based on a horn antenna MW generator characterized by 10.75 ±0.25 GHz frequency and 1 mW/cm2 power density in the plane of exposed seeds. The time duration of the seeds MW exposure were equal to 1-2-6-12-24 hours. Two cases were considered: germinated and non-germinated seeds. Photosynthesis efficiency as well as the plant growth were analyzed after 14 days. Photosynthesis efficiency was assessed by means of the ratio chlorophyll a/chlorophyll b while plant growth was analyzed by means of plant lengths and fresh substance mass accumulation. Photosynthesis efficiency was found significantly increased in both cereal species – the highest influence of MW exposure being noticed in the case of wheat seeds exposed after germination. Fresh biomass accumulation as well as plantlet lengths were enhanced in both wheat and rye samples grown from seeds exposed after germination especially for longer exposure times (12 and 24 hours). We conclude that complex synergic mechanisms triggered by MW absorption could be responsible for the influence of the biosynthesis reactions within the vegetal cell (non-thermal effect).
|
|
|
|