Effects of agro based organic amendments on growth and cadmium uptake in wheat and rice crops irrigated with raw city effluents: Three years field study

Shaghaleh, Hiba; Azhar, Muhammad; Zia-ur-Rehman, Muhammad; Alhaj Hamoud, Yousef; Adam Hamad, Ammar Ali; Usman, Muhammad; Rizwan, Muhammad; Yong, Jean Wan Hong; Alharby, Hesham F.; Al-Ghamdi, Abdullah G.; Alharbi, Basmah M.

doi:10.1016/j.envpol.2024.123365

Cited by 21 publications

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“…As soil organic matter can function as an adsorbent to complex Cd 2+ and may result in a reduction of Cd bioavailability [ 75 , 76 ], this might partly explain differences in the root-Cd content of wheat plants grown in sand and soil. To complicate the story about Cd availability in the soil further, the application of chelated fertilizers has the potential to result in the accumulation of both synthetic and natural organic substances such as ethylenediaminetetraacetic acid (EDTA) and vegetable-extracted amino acids in the soil, and these chelates can also play a role in enhancing the bioavailability to plants by forming metal chelates [ 77 , 78 , 79 ], as was seen in ryegrass [ 80 ]. However, adding to this, in our study we can speculate about suitable soil microbes that can decrease Cd bioavailability by binding Cd with their secreted proteins and further converting it into non-available forms.…”

Section: Discussionmentioning

confidence: 99%

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New Insights into the Bio-Chemical Changes in Wheat Induced by Cd and Drought: What Can We Learn on Cd Stress Using Neutron Imaging?

Lan,

Burca,

Yong

et al. 2024

Plants

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Cadmium (Cd) and drought stresses are becoming dominant in a changing climate. This study explored the impact of Cd and Cd + drought stress on durum wheat grown in soil and sand at two Cd levels. The physiological parameters were studied using classical methods, while the root architecture was explored using non-invasive neutron computed tomography (NCT) for the first time. Under Cd + drought, all the gas exchange parameters were significantly affected, especially at 120 mg/kg Cd + drought. Elevated Cd was found in the sand-grown roots. We innovatively show the Cd stress impact on the wheat root volume and architecture, and the water distribution in the “root-growing media” was successfully visualized using NCT. Diverse and varying root architectures were observed for soil and sand under the Cd stress compared to the non-stress conditions, as revealed using NCT. The intrinsic structure of the growing medium was responsible for a variation in the water distribution pattern. This study demonstrated a pilot approach to use NCT for quantitative and in situ mapping of Cd stress on wheat roots and visualized the water dynamics in the rhizosphere. The physiological and NCT data provide valuable information to relate further to genetic information for the identification of Cd-resilient wheat varieties in the changing climate.

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Section: Discussionmentioning

confidence: 99%

“…In our study, one explanation can be the presence of organic matter (acting as Cd 2+ adsorbents), and microbes in the soil that might be responsible for lowering the Cd availability. Interestingly, higher Cd immobilization in soils was observed for wheat and rice when higher levels of organic matter (biochar) were added [ 78 ].…”

Section: Discussionmentioning

confidence: 99%