Journal of Stress Physiology & Biochemistry, Vol. 21 No. 1 2025, pp. 147-157 ISSN 1997-0838
Original Text Copyright (cc) 2024 by Chetry and Konwar



REVIEW
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Manganese (Mn) toxicity in plants a comprehensive overview: a review

Poonam Chetry1*, Tashmi Konwar2

1 Department of Botany, School of Life Sciences, Sikkim University, 6th Mile, Gangtok, Sikkim, India
2 Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat-785013, Assam, India

*E-Mail: poonam.chetry9011@gmail.com

 


Received September 5, 2024

Manganese (Mn), an essential micronutrient necessary for plant growth and development, has serious phytotoxic effects when present in surplus concentrations. The higher concentration of Mn manifests as a reduction in photosynthetic activity and a gradual up regulation of oxidative stress, which results in reduced yield. Interestingly, Mn toxicity is a serious issue in acid soil, which is mainly encountered in sizable parts of the soil across the globe. In order to mitigate the detrimental influence of Mn on crop productivity, it is of significance to comprehend the diverse physiological aspects of Mn. Thus, such information is crucially important for the identification and development of Mn-tolerant genotypes. Hence, this review article precisely discusses the diverse physiological aspects of Mn toxicity in plants.

Key words:    Acid soil, manganese, metal ion uptake, phytotoxicity, tolerance

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