TY - JOUR
T1 - Use of Maize (Zea mays L.) for phytomanagement of Cd-contaminated soils
T2 - a critical review
AU - Rizwan, Muhammad
AU - Ali, Shafaqat
AU - Qayyum, Muhammad Farooq
AU - Ok, Yong Sik
AU - Zia-ur-Rehman, Muhammad
AU - Abbas, Zaheer
AU - Hannan, Fakhir
N1 - Funding Information:
Financial support from Government College, University Faisalabad is gratefully acknowledged. Yong Sik Ok acknowledges that this work was partly supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2015R1A2A2A11001432; contribution: 80 %).
Publisher Copyright:
© 2016, Springer Science+Business Media Dordrecht.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Maize (Zea mays L.) has been widely adopted for phytomanagement of cadmium (Cd)-contaminated soils due to its high biomass production and Cd accumulation capacity. This paper reviewed the toxic effects of Cd and its management by maize plants. Maize could tolerate a certain level of Cd in soil while higher Cd stress can decrease seed germination, mineral nutrition, photosynthesis and growth/yields. Toxicity response of maize to Cd varies with cultivar/varieties, growth medium and stress duration/extent. Exogenous application of organic and inorganic amendments has been used for enhancing Cd tolerance of maize. The selection of Cd-tolerant maize cultivar, crop rotation, soil type, and exogenous application of microbes is a representative agronomic practice to enhance Cd tolerance in maize. Proper selection of cultivar and agronomic practices combined with amendments might be successful for the remediation of Cd-contaminated soils with maize. However, there might be the risk of food chain contamination by maize grains obtained from the Cd-contaminated soils. Thus, maize cultivation could be an option for the management of low- and medium-grade Cd-contaminated soils if grain yield is required. On the other hand, maize can be grown on Cd-polluted soils only if biomass is required for energy production purposes. Long-term field trials are required, including risks and benefit analysis for various management strategies aiming Cd phytomanagement with maize.
AB - Maize (Zea mays L.) has been widely adopted for phytomanagement of cadmium (Cd)-contaminated soils due to its high biomass production and Cd accumulation capacity. This paper reviewed the toxic effects of Cd and its management by maize plants. Maize could tolerate a certain level of Cd in soil while higher Cd stress can decrease seed germination, mineral nutrition, photosynthesis and growth/yields. Toxicity response of maize to Cd varies with cultivar/varieties, growth medium and stress duration/extent. Exogenous application of organic and inorganic amendments has been used for enhancing Cd tolerance of maize. The selection of Cd-tolerant maize cultivar, crop rotation, soil type, and exogenous application of microbes is a representative agronomic practice to enhance Cd tolerance in maize. Proper selection of cultivar and agronomic practices combined with amendments might be successful for the remediation of Cd-contaminated soils with maize. However, there might be the risk of food chain contamination by maize grains obtained from the Cd-contaminated soils. Thus, maize cultivation could be an option for the management of low- and medium-grade Cd-contaminated soils if grain yield is required. On the other hand, maize can be grown on Cd-polluted soils only if biomass is required for energy production purposes. Long-term field trials are required, including risks and benefit analysis for various management strategies aiming Cd phytomanagement with maize.
KW - Biochar
KW - Bioremediation
KW - Chelating agents
KW - Phytoextraction
KW - Phytoremediation
KW - Silicon
KW - Soil amendment
UR - http://www.scopus.com/inward/record.url?scp=84964053852&partnerID=8YFLogxK
U2 - 10.1007/s10653-016-9826-0
DO - 10.1007/s10653-016-9826-0
M3 - Article
C2 - 27061410
AN - SCOPUS:84964053852
SN - 0269-4042
VL - 39
SP - 259
EP - 277
JO - Environmental Geochemistry and Health
JF - Environmental Geochemistry and Health
IS - 2
ER -