caa a22 4500 397522533 CHVBK 20180308164637.0 cr unu---uuuuu 161202e199511 xx s 000 0 eng 10.1093/jxb/46.11.1731 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.11.1731 Herbicide effects on phenolic metabolism in maize (Zea mays L.)and soybean (Glycine max L.) seedling [Elektronische Daten] [M.M. Nemat Alla, M.E. Younis] The activities of phenylalanine ammonia lyase [PAL; EC 4.3.1.5] and chalcone isomerase [Cl; EC 5.5.1.5] 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. © Oxford University Press RESEARCH PAPERS nationallicence Herbicides nationallicence phenylalanine ammonia lyase nationallicence chalcone isomerase nationallicence anthocyanin nationallicence hydroxyphenolics nationallicence Alla M.M. Nemat Botany Department, Faculty of Science, Mansoura University, Damietta, Egypt aut Younis M.E. Botany Department, Faculty of Science, Mansoura University, Damietta, Egypt aut Journal of Experimental Botany Oxford University Press 46/11(1995-11), 1731-1736 0022-0957 46:11<1731 1995 46 exbotj https://doi.org/10.1093/jxb/46.11.1731 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.11.1731 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alla M.M. Nemat Botany Department, Faculty of Science, Mansoura University, Damietta, Egypt aut NATIONALLICENCE 700 1- Younis M.E. Botany Department, Faculty of Science, Mansoura University, Damietta, Egypt aut NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/11(1995-11), 1731-1736 0022-0957 46:11<1731 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford