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Glucosinolate O-methyltransferase mediated callus formation and affected ROS homeostasis in Arabidopsis thaliana .
Physiology and Molecular Biology of Plants : An International Journal of Functional Plant Biology 2024 January
UNLABELLED: Auxin-induced callus formation was largely dependent on the function of Lateral Organ Boundaries Domain (LBD) family transcription factors. We previously revealed that two IGMT ( Indole glucosinolate oxy-methyl transferase ) genes, IGMT2 and IGMT3 , may be involved in the callus formation process as potential target genes of LBD29 . Overexpression of the IGMT genes induces spontaneous callus formation. However, the details of the IGMT involvement in callus formation process were not well studied. IGMT1-4 , but not IGMT5 , are targeted and induced by LBD29 during the early stage of callus formation. Cell membrane and nucleus localized IGMT3 was mainly expressed in the elongation and maturation zones tissues of the primary root and lateral root, which could be further accumulated after CIM treatment. The igmts quadruple mutant, which obtained by CRISPR/Cas9 technology, exhibits a phenotype of attenuated callus formation. Enhanced indole glucosinolate anabolic pathway caused by IGMT1-4 overexpression promotes callus formation. In addition, the IGMT genes were involved in the reactive oxygen species homeostasis, which could be responsible for its role on callus formation. This study provides novel insights into the role of IGMTs gene-mediated callus formation. Activation of the Indole glucosinolate anabolic pathway is an inducing factor for plant callus initiation.
SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12298-023-01409-2.
SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12298-023-01409-2.
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