Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Alla, M.M. N.
Right arrow Articles by Younis, M.E.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Alla, M.M. N.
Right arrow Articles by Younis, M.E.
Agricola
Right arrow Articles by Alla, M.M. N.
Right arrow Articles by Younis, M.E.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 1995 Oxford University Press

RESEARCH-ARTICLE

Herbicide effects on phenolic metabolism in maize (Zea mays L.)and soybean (Glycine max L.) seedling

M.M. Nemat Alla1 and M.E. Younis

Botany Department, Faculty of Science, Mansoura University Damietta, Egypt

1 To whom correspondence should be addressed: Fax: +20 57 325803

The activities of phenylalanine ammonia lyase [PAL; EC 4.3.1.5 [EC] ] and chalcone isomerase [Cl; EC 5.5.1.5 [EC] ] as well as the contents of anthocyanin and total soluble hydroxyphenolic compounds were investigated in maize (Zea mays L.) and soybean (Glycine max L.) seedlings 120 h after treatment with the field dose of five herbicides from different groups (trifluralin, fluometuron, atrazine, alachlor, and rimsulfuron) having varied modes of action. The fresh weight of both species was greatly decreased by trifluralin followed by fluometuron and atrazine. The dry weight was, in general, only slightly decreased by all the herbicides with the largest response with trifluralin. On the other hand, the activities of PAL and Cl were greatly enhanced in both species by alachlor and rimsulfuron, but decreased by trifluralin. Fluometuron induced decreases in PAL activity of maize only and decreased Cl activity of maize and soybean seedlings. Moreover, hydroxyphenolic compounds were increased in both species by alachlor and rimsulfuron and decreased by trifluralin and atrazine. Similarly, anthocyanin content was increased in both seedlings by alachlor and rimsulfuron, but decreased by trifluralin and fluometuron, whereas atrazine decreased the anthocyanin content in maize only. The present results indicate that stress is maintained by the different herbicides and confirm the controlling action of PAL and Cl on the production of anthocyanin and phenolic compounds during the induced state of stress. In addition, dry weight reduction appeared to coincide with the changes in the parameters of secondary metabolism, suggesting a regulatory role of secondary metabolism on seedling growth.

Key words: Herbicides, phenylalanine ammonia lyase, chalcone isomerase, anthocyanin, hydroxyphenolics


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.