Abstract
Heavy metals are contaminants of much environmental apprehension, as they are hazardous to human being and other biota. The chelates react with the heavy metals and free that metal from the cation exchange sites and resulting the metal chelated species and move readily into the soil. For this purpose, a hydroponic stud was conducted in wire house of Saline Agricultural Research Center to monitor the potential of Maize (Zea mays L.) cultivars against cadmium (Cd) and lead (Pb) toxicity. A chelated source Ethylene Diamine Tetra Acetic acid (EDTA) was used to evaluate the uptake of Cd and Pb. The experiment was comprised of nine treatments. As T1= Control, T2= Cd 25 ppm, T3= Pb 50 ppm, T4= Cd 50 ppm, T5= Pb 100 ppm, T6= Cd 25 ppm+EDTA, T7= Cd 50 ppm+EDTA, T8= Pb 50 ppm+EDTA and T9= Pb 100 ppm+EDTA. Two maize cultivars Syngenta-8711 and 33H-25 were used. It was concluded that the parameters like shoot fresh and dry weight, chlorophyll content (SPAD value) and relative water content decreased under toxic level of Cadmium (Cd) and Lead (Pb). The addition of EDTA increased the uptake of Cd and Pb which ultimately reduced the overall the plant growth. Among the maize hybrids, maximum Cd concentration was observed in Syngenta-33-H-25 while minimum in Syngenta-8711 at all cadmium stress levels. At all the lead stress levels the maximum Pb concentration was observed in Syngenta-33-H-25. The minimum Pb concentration was recorded in Syngenta-8711 at all lead stress levels. Keywords: Cadmium; Chelated; Chlorophyll content; Lead; Maize http://dx.doi.org/10.19045/bspab.2020.90206
Highlights
Center to monitor the potential of Maize (Zea mays L.) cultivars against cadmium (Cd) and lead (Pb) toxicity
The minimum Pb concentration was recorded in Syngenta-8711 at all lead stress levels
We identified the maize cultivar Syngenta-8711 showed less reduction
Summary
Maize is one of the most important food crop an annual 3.1 million tons of maize covering in the world and together with rice and wheat an area of 1.04 million hectares giving 2,984 provides at least 30% of the food calories to kg/ha grain yield on average, making it the more than 4.5 billion people in 94 developing third most valuable cereal of the country and countries and worldwide its production was the production has increased from 0.38 to Published by Bolan Society for Pure and Applied Biology. The impact of heavy metals toxicity, differed substantially between maize cultivars Based on this data, it was observed that maize cultivar Syngenta-8711 showed less reduction (on an average, 72% and 79% of control shoot fresh weight at toxic levels of Cd and Pb respectively). EDTA addition to the treatment systems increased the uptake of heavy metals by plants and decreased the shoot fresh weight. Plants chlorophyll content was severely affected due to toxic effect of heavy metals level ; shoot and root fresh weight was reduced. Based on this data, we identified the maize cultivar Syngenta-8711 showed less reduction (on an average, 82% and 83% of control relative water content at toxic levels of Cd and Pb respectively).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
