Single-cell and spatial RNA sequencing reveal the spatiotemporal trajectories of fruit senescence

Xin Li, Bairu Li, Shaobin Gu, Xinyue Pang, Patrick Mason, Jiangfeng Yuan, Jingyu Jia, Jiaju Sun, Chunyan Zhao () and Robert Henry ()
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Xin Li: Henan University of Science and Technology
Bairu Li: Henan University of Science and Technology
Shaobin Gu: Henan University of Science and Technology
Xinyue Pang: Henan University of Science and Technology
Patrick Mason: Queensland Biosciences Precinct, The University of Queensland
Jiangfeng Yuan: Henan University of Science and Technology
Jingyu Jia: Henan University of Science and Technology
Jiaju Sun: Henan University of Science and Technology
Chunyan Zhao: Jianghan University
Robert Henry: Queensland Biosciences Precinct, The University of Queensland

Nature Communications, 2024, vol. 15, issue 1, 1-19

Abstract: Abstract The senescence of fruit is a complex physiological process, with various cell types within the pericarp, making it highly challenging to elucidate their individual roles in fruit senescence. In this study, a single-cell expression atlas of the pericarp of pitaya (Hylocereus undatus) is constructed, revealing exocarp and mesocarp cells undergoing the most significant changes during the fruit senescence process. Pseudotime analysis establishes cellular differentiation and gene expression trajectories during senescence. Early-stage oxidative stress imbalance is followed by the activation of resistance in exocarp cells, subsequently senescence-associated proteins accumulate in the mesocarp cells at late-stage senescence. The central role of the early response factor HuCMB1 is unveiled in the senescence regulatory network. This study provides a spatiotemporal perspective for a deeper understanding of the dynamic senescence process in plants.

Date: 2024
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DOI: 10.1038/s41467-024-47329-x

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