NAR: Spatiotemporal map of the occurrence of flower organs

The development of flower organs has a complex molecular regulation mechanism, and genes exercise specific and precise functions in different tissues and developmental stages, which regulate a series of processes

A spatiotemporal atlas of organogenesis in the development of orchidflowers

(https://academic.

In the early days of the construction of flower organs, it mainly experienced the process

Orchidaceae have a high degree of biodiversity and are one of the largest families of angiosperms, with 763 genera and more than 28,000 species

Figure 1: Reconstruction results of organ occurrence in the early stage of Phalaenopsis orchid development based on spatial transcriptomics

A total of 4685 genes were identified in multiple cell taxa of early flower primoritobases that were associated with development time, showing selective high expression patterns

Figure 2.

Through the analysis of the development trajectory of the flowered cells, it was found that the gene expression of the No.

Figure 3.

Compared with the tepals and lip petals, anthers are developed later and the process is more complex: from the small cell clusters in flower buds 5 to the anther primory and vegetative tissue in flower buds 6, and then to the pollen grains, anther tip tissue, beak and sticky disc in flower buds 7 and 8 (Figure 4).

Figure 4.
Multiple gene pathways are involved in the process of identity determination and cell type differentiation of anther organs
.

Liu Chang of Fudan University is the first author of
the paper.
Professor Guo Chunce of Jiangxi Agricultural University and researcher Qi Ji of Fudan University are co-corresponding authors of
the paper.
The research has been funded
by the National Natural Science Foundation of China, the State Key Laboratory of Genetic Engineering of Fudan University, and the "****" of Jiangxi Province Innovative High-level Talents.

Release date: 9/15/2022