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Overexpression of AhTDC under waterlogging stress reduces kernel filling rate due to crosstalk between melatonin and ethylene
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  • Yong Chen,
  • Ruier Zeng,
  • Tingting Chen,
  • Xi Li,
  • Jing Cao,
  • Jie Li,
  • Xueyu Xu,
  • Lei Zhang
Yong Chen
South China Agricultural University College of Agriculture

Corresponding Author:chenyong@scau.edu.cn

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Ruier Zeng
South China Agricultural University College of Agriculture
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Tingting Chen
South China Agricultural University College of Agriculture
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Xi Li
South China Agricultural University College of Agriculture
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Jing Cao
South China Agricultural University College of Agriculture
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Jie Li
South China Agricultural University College of Agriculture
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Xueyu Xu
South China Agricultural University College of Agriculture
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Lei Zhang
South China Agricultural University College of Agriculture
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Abstract

Summary: The hindrance of kernel development caused by waterlogging stress (WS) is the direct reason for the peanut yield reduction. Currently, the mechanism of kernel filling responding to WS remains unknown. The waterlogging-sensitive variety Huayu 39 was subjected to WS for 3 days after 7 days after gynophores touched the ground (DAG), and the key stage of WS affecting kernel filling is 14, 21, and 28 DAG. WS decreased the average filling rate and kernel dry weight. Therefore, transcriptome sequencing and widely-targeted metabolomic analysis were conducted on kernel to elucidate the mechanism for the decrease in average filling rate under WS, revealing that overexpression of the gene encoding tryptophan decarboxylase ( AhTDC), which caused the accumulation of melatonin, reduced kernel weight. The sucrose transformation rate was limited by the crosstalk between melatonin and ethylene, thereby reducing the kernel filling rate and hindering kernel development. Our results are crucial for formulating measures to alleviate the negative impact of WS on peanut yield and quality, providing a basis for exploring high-yield and high-quality cultivation, molecular-assisted breeding, and waterlogging prevention.
06 Nov 2023Submitted to Plant, Cell & Environment
06 Nov 2023Submission Checks Completed
06 Nov 2023Assigned to Editor
11 Nov 2023Review(s) Completed, Editorial Evaluation Pending
12 Nov 2023Reviewer(s) Assigned
06 Mar 2024Submission Checks Completed
06 Mar 2024Assigned to Editor
09 Mar 2024Reviewer(s) Assigned
31 Mar 2024Review(s) Completed, Editorial Evaluation Pending
31 Mar 2024Editorial Decision: Revise Minor
17 Apr 2024Submission Checks Completed
17 Apr 2024Assigned to Editor
20 Apr 2024Review(s) Completed, Editorial Evaluation Pending
20 Apr 2024Editorial Decision: Accept