EXAMINATION OF AGRO-PHYSIOLOGICAL TRAITS OF DIFFERENT CULTIVARS OF MAIZE (Zea Mays) WITH LEAF AND EAR TOPPING

Authors : Eshagh HOJATIPOUR, Hamid Reza MIRI, Barmak JAFARI HAGHIGHI, Hamid Reza EBRAHIMI, Abdolreza JAFARI

Pages : 276-284

Doi:10.17557/tjfc.1108917

View : 27 | Download : 12

Publication Date : 2022-12-23

Article Type : Research Paper

Abstract :The biochemical traits of different maize varieties under leaf and cob defoliation conditions were investigated in a factorial experiment, a randomized complete block design with three replications during two crop years of 2017-18 and 2018-19. Treatments consisted of removing leaves and a part of the cob at three levels of control, removing half of the cob after pollination, and removing two upper and lower leaves of the cob after pollination as the first factor. The second factor comprised seven maize varieties including SC704, Kansor, Kordona, Karaj 703, Koosha, Fajr, and Danial 690. After preparing the substrate in the first and second years, seeds of different varieties were planted in the plots based on the treatments. Leaf and cob defoliation treatments were applied after pollination. The results showed that the highest contents of chlorophyll a insert ignore into journalissuearticles values(98.46 mg/g fresh weight, FW);, chlorophyll b insert ignore into journalissuearticles values(138.7 mg/g FW);, carotenoids insert ignore into journalissuearticles values(74.33 mg/g FW);, and anthocyanin insert ignore into journalissuearticles values(1.915 mg/g FW); were obtained in the SC704 variety under combined treatment of defoliating two upper and lower leaves of the cob. The highest amount of catalase insert ignore into journalissuearticles values(58.73 mg protein/min); was recorded in Fajr variety in the control, but peroxidase insert ignore into journalissuearticles values(173.4 mg protein/min); and polyphenol oxidase insert ignore into journalissuearticles values(64.7 mg protein/min); activities were uppermost in the Koosha variety of the control treatment.
Keywords : Biochemical traits, leaf and cob defoliation, maize