Research Progress of MYB Regulated Target Genes Involved in Response to Heavy Metal Stress
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1.School of Life Sciences, Heilongjiang University/Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education/Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region/Key Laboratory of Molecular Biology, College of Heilongjiang Province, Harbin 150080;2.Heilongjiang University /National Beet Medium-Term Gene Bank, Harbin 150080;3.College of Advanced Agriculture and Ecological Environment, Heilongjiang University/Key Laboratory of Sugar Beet Genetics and Breeding, College of Heilongjiang Province, Harbin 150080

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Foundation projects: National Sugar Industry Technology System Project(CARS-1701); Ministry of Agriculture and Rural Affairs Project (19240700); Inner Mongolia Autonomous Region “the Open Competition Mechanism to Select the Best Candidates” Project (2022JBGS0029); Heilongjiang Provincial Natural Science Foundation of China (LH2023C090); Fundamental Research Funds for Heilongjiang Provincial Universities (2022-KYYWF-1070)

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    Abstract:

    Heavy metals, such as cadmium and plumbum, are increasingly contaminating soil. These pollutants not only interfere the plant life cycle but also diminish crop yields and can even lead to plant mortality. Plants have evolved a series of defense mechanisms to mitigate the stress induced by heavy metals. Plant MYB transcription factors play pivotal role as key regulators under stress conditions. They interact with downstream target genes in response to heavy metal stress, thus enhancing tolerance and minimizing damage to plants. To elucidate the molecular mechanisms by which plants cope with heavy metal stress (especially cadmium stress) is a primary goal in plant biotechnology and agricultural breeding.This article reviews several critical aspects, including the identification and characteristics of MYB family members, their functions, the mechanisms of regulating target genes, as well as exploring how MYB modulate target genes to participate in heavy metal stress response through photosynthesis and hormones. Furthermore, we discuss the adaptive mechanism of plants to heavy metal stress, where MYB transcription factors combine with target genes or promoter elements through signaling pathways, including reactive oxygen species homeostasis, abscisic acid signaling, gibberellins signaling, and photosynthesis. These interactions are critical for regulating the uptake, transport and sequestration of heavy metals in plants. Collectively, this review provides a theoretical foundation for the further exploitation and utilization of MYB transcription factors in enhancing plant resilience to heavy metal stress.

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  • Received:June 24,2024
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  • Online: March 07,2025
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