TY - JOUR
T1 - Exogenous application of low and high molecular weight organic acids differentially affected the uptake of cadmium in wheat-rice cropping system in alkaline calcareous soil
AU - Zia-ur-Rehman, Muhammad
AU - Bani Mfarrej, Manar Fawzi
AU - Usman, Muhammad
AU - Azhar, Muhammad
AU - Rizwan, Muhammad
AU - Alharby, Hesham F.
AU - Bamagoos, Atif A.
AU - Alshamrani, Rahma
AU - Ahmad, Zahoor
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/7/15
Y1 - 2023/7/15
N2 - Anthropogenic cadmium (Cd) in arable soils is becoming a global concern due to its harmful effects on crop yield and quality. The current study examined the role of exogenously applied low molecular weight organic acids (LMWOAs) including oxalic acid (OxA), tartaric acid (TA) and high molecular weight organic acids (HMWOAs) like citric acid (CA) and humic acid (HA) for the bioavailability of Cd in wheat-rice cropping system. Maximum increase in root dry-weight, shoot dry-weight, and grain/paddy yields was recorded with HA for both crops. The HA significantly decreased AB-DTPA Cd in contaminated soils which remained 41% for wheat and 48% for rice compared with their respective controls. The minimum concentration of Cd in roots, shoots and grain/paddy was observed in HA treatment in both crops. The organic acids significantly increased the growth parameters, photosynthetic activity, and relative leaf moisture contents for both wheat and rice crops compared to that with the contaminated control. Application of OxA and TA increased the bioavailability of Cd in soils and plant tissues while CA and HA decreased the bioavailability of Cd in soils and plants. The highest decrease in Cd uptake, bioaccumulation, translocation factor, immobilization, translocation, harvest, and health risk indices were observed with HA while maximum increase was recorded with OxA for both wheat and rice. The results concluded that use of HMWOAs is effective in soil Cd immobilization being maximum with HA. While LMWOAs can be used for the phytoextraction of Cd in contaminated soils having maximum potential with OxA.
AB - Anthropogenic cadmium (Cd) in arable soils is becoming a global concern due to its harmful effects on crop yield and quality. The current study examined the role of exogenously applied low molecular weight organic acids (LMWOAs) including oxalic acid (OxA), tartaric acid (TA) and high molecular weight organic acids (HMWOAs) like citric acid (CA) and humic acid (HA) for the bioavailability of Cd in wheat-rice cropping system. Maximum increase in root dry-weight, shoot dry-weight, and grain/paddy yields was recorded with HA for both crops. The HA significantly decreased AB-DTPA Cd in contaminated soils which remained 41% for wheat and 48% for rice compared with their respective controls. The minimum concentration of Cd in roots, shoots and grain/paddy was observed in HA treatment in both crops. The organic acids significantly increased the growth parameters, photosynthetic activity, and relative leaf moisture contents for both wheat and rice crops compared to that with the contaminated control. Application of OxA and TA increased the bioavailability of Cd in soils and plant tissues while CA and HA decreased the bioavailability of Cd in soils and plants. The highest decrease in Cd uptake, bioaccumulation, translocation factor, immobilization, translocation, harvest, and health risk indices were observed with HA while maximum increase was recorded with OxA for both wheat and rice. The results concluded that use of HMWOAs is effective in soil Cd immobilization being maximum with HA. While LMWOAs can be used for the phytoextraction of Cd in contaminated soils having maximum potential with OxA.
KW - Bioaccumulation
KW - HMWOAs
KW - Immobilization
KW - LMWOAs
KW - Phytoextraction
KW - Oxalic Acid
KW - Molecular Weight
KW - Triticum
KW - Soil Pollutants/analysis
KW - Oryza
KW - Cadmium/analysis
KW - Edible Grain/chemistry
KW - Soil
KW - Crops, Agricultural
UR - http://www.scopus.com/inward/record.url?scp=85153613832&partnerID=8YFLogxK
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UR - https://www.mendeley.com/catalogue/defafafd-9464-3ba6-9085-2819b22eb47a/
U2 - 10.1016/j.envpol.2023.121682
DO - 10.1016/j.envpol.2023.121682
M3 - Article
C2 - 37094734
AN - SCOPUS:85153613832
SN - 0269-7491
VL - 329
JO - Environmental Pollution
JF - Environmental Pollution
M1 - 121682
ER -