Home|Journals|Articles by Year|Audio Abstracts
 

Original Research

Egypt. J. Exp. Biol. (Bot.). 2008; 4(0): 23-29


EFFECT OF ULTRAVIOLET RADIATION ON CONIDIAL GERMINATION AND GROWTH OF Fusarium oxysporum and Aspergillus nidulans

Metwally A. Metwally.




Abstract

We evaluated the effects of exposure to doses of near- irradiation (420-425 peak 366 nm) and far- (240-280 peak 254 nm) on the conidial germination, length of germ tubes and radial growth rate of Fusarium oxysporum and Aspergillus nidulans (anamorph of Emericella nidulans). Near- irradiation delay conidial germination and inhibitory effect was maximal after 240 min of irradiation. The length of developed germ tubes was reduced up to 98% and 70% in F. oxysporum and A. nidulans respectively. Far- irradiation was more effective than near- and drastically reduces the conidial germination. Irradiation for 25 min completely inhibited conidial germination in F. oxysporum while 35 min exposure caused complete inhibition in A. nidulans. The development of germ tubes was significantly inhibited and very slow after far- irradiation compared with that of near- irradiation. Radial growth was also retarded by near- irradiation especially when subjected for long periods. Far- irradiation was more effective than near- and the inhibitory effect was markedly observed during the 72 hr followed irradiation. F. oxysporum appeared to be more sensitive to - irradiation than A. nidulans.

Key words: F. oxysporum, A. nidulans, -irradiation, photocontrol, conidial germination, growth rate.






Full-text options


Share this Article


Online Article Submission
• ejmanager.com




ejPort - eJManager.com
Refer & Earn
JournalList
About BiblioMed
License Information
Terms & Conditions
Privacy Policy
Contact Us

The articles in Bibliomed are open access articles licensed under Creative Commons Attribution 4.0 International License (CC BY), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.