The Cd-induced morphological and photosynthetic disruption is related to the reduced Fe status and increased oxidative injuries in sugar beet.

Autor: Haque AM; Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, 6205, Bangladesh., Tasnim J; Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, 6205, Bangladesh., El-Shehawi AM; Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia., Rahman MA; Grassland and Forage Division, National Institute of Animal Science, Cheonan31000, Republic of Korea., Parvez MS; Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, 6205, Bangladesh., Ahmed MB; Institut de Recherche en Biologie Végétale (IRBV), University of Montreal, Montréal, Québec, H1X 2B2, Canada., Kabir AH; Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, 6205, Bangladesh. Electronic address: ahmad.kabir@ru.ac.bd.
Jazyk: angličtina
Zdroj: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2021 Sep; Vol. 166, pp. 448-458. Date of Electronic Publication: 2021 Jun 17.
DOI: 10.1016/j.plaphy.2021.06.020
Abstrakt: Cadmium (Cd) toxicity is a form of soil contamination that causes losses in plant growth and yield. Understanding the effects of Cd-induced changes in physiological and cellular processes will help scientists develop better scientific strategies for sugar beet plant improvement. Cd toxicity triggered a substantial decrease in morphological parameters and total soluble protein in sugar beets, as well as membrane damage and cell death. Furthermore, the SPAD score and photosynthetic OJIP parameters in leaves were severely affected due to Cd stress. This was correlated with the decreased FCR activity and BvIRT1 expression in roots, suggesting the adverse effect of Cd in Fe acquisition in sugar beet. Our findings also revealed that BvHMA3 and BvNRAMP3 were upregulated in Cd-exposed roots, indicating that these genes might be involved in Cd uptake in sugar beet. In silico analysis of BvHMA3 and BvNRAMP3 proteins showed close partnerships with several Arabidopsis genes mainly linked to metal tolerance protein, cation diffusion facilitator, vacuolar metal transporter, and vacuolar Fe transporter. Subsequently, Cd-exposed sugar beet showed severe sensitivity to oxidative damages resulted in elevated H 2 O 2 and O 2 .- without possessed efficient antioxidant defense. Finally, growth retardation in Cd-exposed sugar beets is linked to photosynthetic inefficiency caused by low Fe levels and oxidative stress in cells. These results may be used to improve Cd-sensitive sugar beet plants by breeding or transgenic programs.
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Databáze: MEDLINE
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