| Autor: |
Ma, Jing1 (AUTHOR) jingma2013@cumt.edu.cn, Saleem, Muhammad Hamzah2 (AUTHOR) saleemhamza312@webmail.hzau.edu.cn, Alsafran, Mohammed3,4 (AUTHOR) m.alsafran@qu.edu.qa, Jabri, Hareb Al5,6 (AUTHOR) h.aljabri@qu.edu.qa, Mehwish7 (AUTHOR) mehwishkarim00@gmail.com, Rizwan, Muhammad2 (AUTHOR) m.rizwan@qu.edu.qa, Nawaz, Muhammad1,7 (AUTHOR) muhammadnawaz@gcuf.edu.pk, Ali, Shafaqat1,8,9 (AUTHOR) shafaqataligill@yahoo.com, Usman, Kamal1,3 (AUTHOR) kusman@qu.edu.qa |
| Předmět: |
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| Zdroj: |
Ecotoxicology & Environmental Safety. Sep2022, Vol. 243, pN.PAG-N.PAG. 1p. |
| Abstrakt: |
Soil contamination with cadmium (Cd) is a persistent threat to crop production worldwide. The present study examined the putative roles of nitric oxide (NO) in improving Cd-tolerance in cauliflower (Brassica oleracea L.). The present study was conducted using four different genotypes of B. oleracea named as FD-3, FD-4, FD-2 and Ceilo Blanco which were subjected to the Cd stress at various concentrations i.e., 0, 5, 10 and 20 µM with or without the application of NO i.e., 0.10 mM in the sand containing nutrient Hoagland's solution. Our results illustrated that the increasing levels of Cd in the sand, significantly (P < 0.05) decreased shoot length, root length, shoot fresh weight, root fresh weight, shoot dry weight, root dry weight, germination percentage, germination index, mean germination time, time to 50% germination, chlorophyll a, chlorophyll b, total chlorophyll and carotenoid contents in all genotypes of B. oleracea. The concentration of malondialdehyde (MDA) and Cd accumulation (roots and shoots) increased significantly (P < 0.05) under the increasing levels of Cd in all genotypes of B. oleracea while antioxidant (enzymatic or non-enzymatic) capacity and nutritional status of the plants was decreased with varying levels of Cd in the sand. From all studied genotypes of B. oleracea , Ceilo Blanco and FD-4 was found to be most sensitive species to the Cd stress under the same levels of the Cd in the medium while FD-2 and FD-3 showed more tolerance to the Cd stress compared to all other genotypes of B. oleracea. Although, toxic effect of Cd in the sand can overcome by the application of NO which not only increased plant growth and nutrients accumulation but also decreased the oxidative damage to the membranous bounded organelles and also Cd accumulation in various parts of the plants in all genotypes of B. oleracea. Hence, it was concluded that application of NO can overcome Cd toxicity in B. oleracea by maintaining the growth regulation and nutritional status of the plant and overcome oxidative damage induced by Cd toxicity in all genotypes of B. oleracea. • The increasing levels of Cd decreased plant growth and physiological attributes in B. oleracea genotypes. • Among all studied genotypes of B. oleracea , FD-2 and FD-3 was more tolerant to Cd stress than Ceilo Blanco and FD-4. • Application of NO decreased Cd uptake in the plant parts and increased plant growth and nutritional quality in the plants. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
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Full Text from ScienceDirect