Home    eJManager.com Add Your Journal   |    Follow on Twitter   |    Subscribe to List

Directory for Medical Articles
 

Open Access

-



Role of He-Ne laser pre-treatment in protecting Zea mays against the deleterious effects of ultraviolet radiations

Abdelghafar M. Abu-Elsaoud; Raghda H.M. Shahda.

Abstract
The current study aims to record the role of the pretreatment of Zea mays grains with a He-Ne laser damage repair of ultraviolet (UVA+B) radiation effect. Plants were divided into four groups; control group, group exposed to the He–Ne laser only for 1- 300 seconds, group exposed to UVA+B only and in the fourth group; grains were treated with different He-Ne laser irradiation duration and after 2 weeks were exposed to 3.6 and 7.2 KJ m−2 d−1 UVA+B radiation. Irradiation with He-Ne laser significantly (p≤0.05) increased shoot lengths, number of leaves, shoot biomass (week1), root dry weight, chlorophyll-a, chlorophyll b, and total chlorophyll. Superoxide free radical, hydrogen peroxide and lipid peroxidation was decreased at low doses and increased with higher doses of laser. Various deleterious effects of ultraviolet radiations were recorded in Zea mays including decreased photosynthetic pigments, shoot and root biomass, and root and shoot lengths. The pretreatment with a laser before exposure to UVA+B radiation causes a slight increase in plant length and leaves a number, an increase of root length, while a decrease of shoot/root length and an increase in leaf parameters at some laser treatments. The results revealed that the pretreatment of maize grains with He–Ne laser doses for 10s to 300s alleviated the damaging effects of UV-B radiation in the range of 7.2 KJ m−2 d−1 UVA+B radiation.

Key words: He-Ne laser;Ultraviolet radiation;protective role;pigments;oxidative stress;antioxidants;UV-B absorbing compounds;flavonoids


Full text links

Share this Article




ScopeMed Home
Follow ScopeMed on Twitter
Article Tools
Job Opportunities/Service Offers
eJManager OJMS
eJPort Journal Hosting
About ScopeMed
Terms & Conditions
Privacy Policy
Suggest a Journal
Publisher Login
Contact Us

The articles in Scopemed are open access articles licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
ScopeMed is a Service of eJManager LLC Publishing for Scientific Publications. Copyright ScopeMed Information Services.
Scopemed Buttons