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The homeodomain-leucine zipper (HD-Zip) gene family plays a pivotal role in plant development and stress responses. Nevertheless, a comprehensive characterization of the HD-Zip gene family in kiwifruit has been lacking. In this study, we have systematically identified 70 HD-Zip genes in the Actinidia chinensis (Ac) genome and 55 in the Actinidia eriantha (Ae) genome. These genes have been categorized into four subfamilies (HD-Zip I, II, III, and IV) through rigorous phylogenetic analysis. Analysis of synteny patterns and selection pressures has provided insights into how whole-genome duplication (WGD) or segmental may have contributed to the divergence in gene numbers between these two kiwifruit species, with duplicated gene pairs undergoing purifying selection. Furthermore, our study has unveiled tissue-specific expression patterns among kiwifruit HD-Zip genes, with some genes identified as key regulators of kiwifruit responses to bacterial canker disease and postharvest processes. These findings not only offer valuable insights into the evolutionary and functional characteristics of kiwifruit HD-Zips but also shed light on their potential roles in plant growth and development.
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http://dx.doi.org/10.1186/s12864-024-10025-7 | DOI Listing |
Plants (Basel)
August 2025
State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping, College of Life Sciences, Henan Agricultural University, Zhengzhou 450046, China.
HD-ZIP proteins (homeodomain-leucine zipper proteins) are a large family of plant-specific transcription factors that play crucial roles in regulating various physiological and developmental processes, including growth, differentiation, response to environmental stress, and reproductive development. Seed size is the main limiting factor affecting the yield of maize (). However, the genome-wide identification and characterization of this family in maize and its biological functions in seed size have not been reported.
View Article and Find Full Text PDFJ Exp Bot
August 2025
State Key Laboratory of Vegetable Biobreeding, Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China.
Leaf shape is a vital economic and developmental trait of the leafy vegetable Chinese cabbage (Brassica rapa L. subsp. pekinensis).
View Article and Find Full Text PDFFront Plant Sci
July 2025
Department of Bioinformatics, School of Life Sciences, Pondicherry University, Puducherry, India.
Drought, exacerbated by climate change, threatens global food security, particularly impacting crop products, including tomatoes, which are economically essential but drought sensitive. This study explores drought responses in the wild-type (WT), known for drought tolerance, and cultivated (CT), through RNA-Seq analysis at three drought intervals (2 Weeks +5D, +8D, and +11D). Across these points, WT and CT showed 716 and 1459 differentially expressed genes (DEGs), respectively.
View Article and Find Full Text PDFPlant Cell
September 2025
State Key Laboratory of Gene Function and Modulation Research, School of Advanced Agricultural Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China.
Polycomb repressive complex 2 (PRC2) regulates plant development, but systemic PRC2 mutants have pleiotropic defects that complicate investigation of its role in regulating secondary growth. Here, we used CRISPR-TSKO to generate a vascular tissue-specific knockout of the PRC2 component FERTILIZATION INDEPENDENT ENDOSPERM (FIE) driven by the promoter of the vascular tissue-specific gene WUSCHEL HOMEOBOX RELATED 14 (WOX14), termed WOX14pro:FIE-KO, in Arabidopsis (Arabidopsis thaliana). WOX14pro:FIE-KO plants showed ectopic vascular bundles, vascular cylinders within the phloem parenchyma, and inhibited differentiation of reticulate or pitted vessels and fibers in xylem.
View Article and Find Full Text PDFPlant Biotechnol J
August 2025
Department of Life Science (BK21 Program), Chung-Ang University, Seoul, Korea.
Homeodomain-leucine zipper (HD-ZIP) transcription factors, particularly subfamily I genes, are associated with drought stress responses. However, the functional roles of HD-ZIP subfamily II genes, particularly in pepper (Capsicum annuum), remain inadequately studied, and their involvement in abscisic acid (ABA) signalling is not fully elucidated. In this study, we isolated the HD-ZIP subgroup II gene CaDRHB12 (C.
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