ArticleFrontiers in plant science2026
Genome-wide identification and dynamic transcriptome profiling of the DYW-type PPR family across greening of chlorotic leaves in pear (
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Pear ( Methods: To comprehensively characterize the involvement of DYW-type PPR proteins in pear leaf and chloroplast development, we performed a genome-wide identification of 129 DYW-type PPR proteins in pears and systematically analyzed their sequence diversity, protein domain architecture, and evolutionary relationships. Results: Compared with the wild-type 'Chuxialv', the 'Chuxialv' bud mutant exhibits reduced chlorophyll and ferrous ion content, along with disrupted chloroplast ultrastructure in leaves. Using this paired material, we conducted high-depth whole-genome resequencing to identify structural variations within the DYW-type PPR gene family. Furthermore, RNA-seq was performed on leaf samples from yellow to green, spanning five distinct developmental stages to construct a temporal expression profile of DYW-type PPR genes. Six DYW-type PPR genes exhibiting differential expression were identified, and protein-protein interaction network analysis of them, coupled with functional enrichment analysis, provided the underlying regulatory mechanism in chloroplast development and photosynthesis. Coexpression and functional regulatory networks of DYW-type PPR genes were constructed by integrating weighted gene co-expression network analysis with gene ontology enrichment analysis. Notably, only the coexpression module centered on Discussion: In conclusion, this study elucidated the structural variations and dynamic expression patterns of the DYW-type PPR gene associated with chlorotic leaves in pears, offering novel insights and potential regulatory pathways relevant to chloroplast development and the transformation of chlorotic leaves to green in pears.
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