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• W3208497585 endingPage "63" @default.
• W3208497585 startingPage "47" @default.
• W3208497585 abstract "SUMMARY Dwarfing rootstocks and dwarf cultivars are urgently needed for modern pear cultivation. However, germplasm resources for dwarfing pear are limited, and the underlying mechanisms remain unclear. We previously showed that dwarfism in pear is controlled by the single dominant gene PcDw ( Dwarf ). We report here that the expression of PcAGP7‐1 ( ARABINOGALACTAN PROTEIN 7‐1 ), a key candidate gene for PcDw , is significantly higher in dwarf‐type pear plants because of a mutation in an E‐box in the promoter. Electrophoretic mobility shift assays and transient infiltration showed that the transcription factors PcBZR1 and PcBZR2 could directly bind to the E‐box of the PcAGP7‐1 promoter and repress transcription. Moreover, transgenic pear lines overexpressing PcAGP7‐1 exhibited obvious dwarf phenotypes, whereas RNA interference pear lines for PcAGP7‐1 were taller than controls. PcAGP7‐1 overexpression also enhanced cell wall thickness, affected cell morphogenesis, and reduced brassinolide (BL) content, which inhibited BR signaling via a negative feedback loop, resulting in further dwarfing. Overall, we identified a dwarfing mechanism in perennial woody plants involving the BL‐BZR/BES‐AGP‐BL regulatory module. Our findings provide insight into the molecular mechanism of plant dwarfism and suggest strategies for the molecular breeding of dwarf pear cultivars." @default.
• W3208497585 created "2021-11-08" @default.
• W3208497585 creator A5029907469 @default.
• W3208497585 creator A5050166724 @default.
• W3208497585 creator A5052442021 @default.
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• W3208497585 creator A5070551517 @default.
• W3208497585 creator A5078544752 @default.
• W3208497585 creator A5084156773 @default.
• W3208497585 date "2021-11-09" @default.
• W3208497585 modified "2023-09-27" @default.
• W3208497585 title "A mutation in the promoter of the arabinogalactan protein 7‐like gene <i>PcAGP7‐1</i> affects cell morphogenesis and brassinolide content in pear (<i>Pyrus communis</i> L.) stems" @default.
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• W3208497585 doi "https://doi.org/10.1111/tpj.15548" @default.
• W3208497585 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34695268" @default.
• W3208497585 hasPublicationYear "2021" @default.
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