Spatial transcriptomics uncover sucrose post-phloem transport during maize kernel development

Yuxin Fu, Wenxin Xiao, Lang Tian, Liangxing Guo, Guangjin Ma, Chen Ji, Yongcai Huang, Haihai Wang, Xingguo Wu, Tao Yang, Jiechen Wang, Jirui Wang, Yongrui Wu () and Wenqin Wang ()
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Yuxin Fu: Shanghai Normal University
Wenxin Xiao: Shanghai Normal University
Lang Tian: Shanghai Normal University
Liangxing Guo: Shanghai Institute of Plant Physiology & Ecology
Guangjin Ma: Shanghai Institute of Plant Physiology & Ecology
Chen Ji: Shanghai Institute of Plant Physiology & Ecology
Yongcai Huang: Shanghai Institute of Plant Physiology & Ecology
Haihai Wang: Shanghai Institute of Plant Physiology & Ecology
Xingguo Wu: Shanghai Normal University
Tao Yang: Shanghai Institute of Plant Physiology & Ecology
Jiechen Wang: Shanghai Institute of Plant Physiology & Ecology
Jirui Wang: Sichuan Agricultural University
Yongrui Wu: Shanghai Institute of Plant Physiology & Ecology
Wenqin Wang: Shanghai Normal University

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Maize kernels are complex biological systems composed of three genetic sources, namely maternal tissues, progeny embryos, and progeny endosperms. The lack of gene expression profiles with spatial information has limited the understanding of the specific functions of each cell population, and hindered the exploration of superior genes in kernels. In our study, we conduct microscopic sectioning and spatial transcriptomics analysis during the grain filling stage of maize kernels. This enables us to visualize the expression patterns of all genes through electronical RNA in situ hybridization, and identify 11 cell populations and 332 molecular marker genes. Furthermore, we systematically elucidate the spatial storage mechanisms of the three major substances in maize kernels: starch, protein, and oil. These findings provide valuable insights into the functional genes that control agronomic traits in maize kernels.

Date: 2023
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DOI: 10.1038/s41467-023-43006-7

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