ArticleJournal of integrative plant biology2026
The PbrMADS1-PbrMYB169 complex has uniquely emerged to regulate lignification of stone cells in pear.
Article in Journal of integrative plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- The PbrMADS1-PbrMYB169 complex has uniquely emerged to regulate lignification of stone cells in pear.Journal of integrative plant biology · 2026Article
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9 authors.
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Abstract
Lignified stone cells are a unique feature of pear fruit, significantly affecting fruit texture. Even though some research efforts have already been made, the stone cell formation mechanism is complex, with many aspects yet to be elucidated. Here, through a genome-wide association analysis of stone cell traits, we identified PbrMADS1, a member of the SEPALLATA3 (SEP3) subfamily, as a candidate gene specifically expressed in stone cells during early fruit development. Functional studies confirmed that PbrMADS1 promotes stone cell formation; however, it does not directly activate lignin-related genes. Instead, PbrMADS1 interacts with PbrMYB169, enhancing PbrMYB169's binding to AC elements and amplifying downstream gene activation. Notably, homologous MADS1 and MYB169 proteins from closely related species such as apple and loquat do not form a similar complex. Sequence analysis revealed that the protein sequence of PbrMADS1 contains methionine (M) at the 63
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