Abstract
Key message
We review and introduce the importance of salicylic acid in plants under cadmium stress, and provide insights into potential regulatory mechanisms for alleviating cadmium toxicity.
Abstract
Cadmium (Cd) is a widespread and potentially toxic environmental pollutant, originating mainly from rapid industrial processes, the application of fertilizers, manures and sewage sludge, and urban activities. It is easily taken up by plants, resulting in obvious toxicity symptoms, including growth retardation, leaf chlorosis, leaf and root necrosis, altered structures and ultrastructures, inhibition of photosynthesis, and cell death. Therefore, alleviating Cd toxicity in plants is a major aim of plant research. Salicylic acid (SA) is a ubiquitous plant phenolic compound that has been used in many plant species to alleviate Cd toxicity by regulating plant growth, reducing Cd uptake and distribution in plants, protecting membrane integrity and stability, scavenging reactive oxygen species and enhancing antioxidant defense system, improving photosynthetic capacity. Furthermore, SA functions as a signaling molecule involved in the expression of several important genes. Significant amounts of research have focused on understanding SA functions and signaling in plants under Cd stress, but several questions still remain unanswered. In this article, the influence of SA on Cd-induced stress in plants and the potential regulation mechanism for alleviating Cd toxicity are reviewed.
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This work was supported by the National Natural Science Foundation of China (31401299, 31470368, 31401356), and Zhejiang Provincial Natural Science Foundation of China (LZ14C020001, LY13C020002).
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Liu, Z., Ding, Y., Wang, F. et al. Role of salicylic acid in resistance to cadmium stress in plants. Plant Cell Rep 35, 719–731 (2016). https://doi.org/10.1007/s00299-015-1925-3
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DOI: https://doi.org/10.1007/s00299-015-1925-3