AI Article Synopsis
- * Research indicates that during wood formation, the decay of the gene PdCPD1, influenced by its 3' UTR, is crucial for fine-tuning BR synthesis; overexpressing this gene increases BR levels but inhibits wood growth.
- * The protein PdGRP1 binds to a specific region in the 3' UTR of PdCPD1, leading to its mRNA breakdown, highlighting a novel mechanism that could aid in genetically optimizing wood biomass in trees.
Article Abstract
Brassinosteroids (BRs) are plant hormones that regulate wood formation in trees. Currently, little is known about the post-transcriptional regulation of BR synthesis. Here, we show that during wood formation, fine-tuning BR synthesis requires 3'UTR-dependent decay of Populus CONSTITUTIVE PHOTOMORPHOGENIC DWARF 1 (PdCPD1). Overexpression of PdCPD1 or its 3' UTR fragment resulted in a significant increase of BR levels and inhibited secondary growth. In contrast, transgenic poplars repressing PdCPD1 3' UTR expression displayed moderate levels of BR and promoted wood formation. We show that the Populus GLYCINE-RICH RNA-BINDING PROTEIN 1 (PdGRP1) directly binds to a GU-rich element in 3' UTR of PdCPD1, leading to its mRNA decay. We thus provide a post-transcriptional mechanism underlying BRs synthesis during wood formation, which may be useful for genetic manipulation of wood biomass in trees.
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| http://dx.doi.org/10.1111/jipb.13509 | DOI Listing |
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