PJB-2023-76
Effect of cadmium toxicity on Zn, Mn, Cd, Fe concentration and translocation, bioaccumulation, uptake of Cd in root and shoot of different rice varieties
Muhammad Akram, Saif Ullah, Kamran Ikram, Muhammad Saqlain Zaheer, Muhammad Zeeshan Mansha, Hafiz Haider Ali, Yasir Niaz, Mahmoud Fathy Seleiman and Naeem Khan
Abstract
Rice (Oryza sativa L.) is found a paramount contributor (>75%) of Cd contamination in the food chain in many countries of Asia, including Pakistan. In the present study, twenty local rice varieties were selected and the varietal response was investigated against Cd application with four strengths (0, 5, 10, and 15 µM) under hydroponic conditions by following completely randomized design under the factorial arrangements along with three replicates. Results regarding Cd concentration in roots and shoots revealed that the maximum level of Cd was assessed in V20 (IRRI-6) and minimum in V1 (Super Basmati) when Cd was applied at a higher level (15 µM), while higher Cd uptake in roots and shoots was exhibited by V20 (IRRI-6) and V13 (KS-282) respectively and minimum in V1 (Super Basmati) among both ones at Cd application with strength 15 µM. Maximum translocation and bioaccumulation of Cd in roots and shoots were observed in V20 (IRRI-6) and minimum in V1 (Super Basmati). Zinc level in root was higher in V4 (Shaheen Basmati) and minimum in V14 (KSK-133), while, in shoots V7 (Basmati-515) exhibited maximum Zn concentration and minimum by V2 (Kainat Basmati). Maximum Mn level in roots against Cd application were observed in V4 (Shaheen Basmati) and minimum in V2 (Kainat Basmati), whereas its level was higher in shoots of V13 (KS-282) and lower in V8 (Pak Basmati). Iron contents were higher in roots of V5 (Basmati-198) and lower in V20 (IRRI-6), while, in shoots, Fe level was higher in shoots of V8 (Pak Basmati) and minimum in V2 (Kainat Basmati) against Cd application. V1 (Super Basmati) showed a positive response against Cd contaminations. This study enlightens the era for others to assess the impact of heavy metals on various crops. Increasing the Cd concentration higher the binding to sulfhydryl groups in proteins and enzymes that inactive and disturb the metabolic pathway of rice plant and decrease uptake of essential nutrients. Cd competes with the nutrients and damages the plant nutrients balance and create physiological stress
To Cite this article:
Akram, M., S. Ullah, K. Ikram, M.S. Zaheer, M.Z. Mansha, H.H. Ali, Y. Niaz, M.F. Seleiman and N. Khan. 2024. Effect of cadmium toxicity on Zn, Mn, Cd, Fe concentration and translocation, bioaccumulation, uptake of Cd in root and shoot of different rice varieties. Pak. J. Bot., 56(1): DOI: http://dx.doi.org/10.30848/PJB2024-1(42)
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