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四倍体中与多倍体相关的叶片钾升高的转录网络。

Transcriptional network underpinning ploidy-related elevated leaf potassium in neo-tetraploids.

机构信息

Future Food Beacon of Excellence and the School of Biosciences, University of Nottingham, Nottingham, LE12 5RD, UK.

State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China.

出版信息

Plant Physiol. 2022 Oct 27;190(3):1715-1730. doi: 10.1093/plphys/kiac360.

DOI:10.1093/plphys/kiac360
PMID:35929797
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9614460/
Abstract

Whole-genome duplication generates a tetraploid from a diploid. Newly created tetraploids (neo-tetraploids) of Arabidopsis (Arabidopsis thaliana) have elevated leaf potassium (K), compared to their diploid progenitor. Micro-grafting has previously established that this elevated leaf K is driven by processes within the root. Here, mutational analysis revealed that the K+-uptake transporters K+ TRANSPORTER 1 (AKT1) and HIGH AFFINITY K+ TRANSPORTER 5 (HAK5) are not necessary for the difference in leaf K caused by whole-genome duplication. However, the endodermis and salt overly sensitive and abscisic acid-related signaling were necessary for the elevated leaf K in neo-tetraploids. Contrasting the root transcriptomes of neo-tetraploid and diploid wild-type and mutants that suppress the neo-tetraploid elevated leaf K phenotype allowed us to identify a core set of 92 differentially expressed genes associated with the difference in leaf K between neo-tetraploids and their diploid progenitor. This core set of genes connected whole-genome duplication with the difference in leaf K between neo-tetraploids and their diploid progenitors. The set of genes is enriched in functions such as cell wall and Casparian strip development and ion transport in the endodermis, root hairs, and procambium. This gene set provides tools to test the intriguing idea of recreating the physiological effects of whole-genome duplication within a diploid genome.

摘要

全基因组加倍会将二倍体转化为四倍体。与二倍体亲本相比，拟南芥（Arabidopsis thaliana）的新形成的四倍体（neo-tetraploids）具有较高的叶片钾（K）含量。以前的微嫁接实验已经证实，这种叶片 K 升高是由根部的过程驱动的。在这里，突变分析表明，K+转运蛋白 1（AKT1）和高亲和力 K+转运蛋白 5（HAK5）对于全基因组加倍引起的叶片 K 差异不是必需的。然而，内皮层和盐过度敏感以及脱落酸相关信号对于 neo-tetraploids 中升高的叶片 K 是必需的。与 neo-tetraploid 和二倍体野生型以及抑制 neo-tetraploid 升高叶片 K 表型的突变体的根转录组进行对比，使我们能够鉴定出一组与 neo-tetraploids 和其二倍体亲本之间叶片 K 差异相关的 92 个差异表达基因。这组核心基因将全基因组加倍与 neo-tetraploids 和其二倍体亲本之间叶片 K 的差异联系起来。该基因集富集了细胞壁和 Casparian 条带发育以及内皮层、根毛和原形成层中的离子转运等功能。该基因集为在二倍体基因组内重现全基因组加倍的生理效应提供了工具。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/43a515ddee0a/kiac360f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/524fae9acb3a/kiac360f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/f84c1c8c0fed/kiac360f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/ef1eb51cf61b/kiac360f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/9148a25749b1/kiac360f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/6517029ab186/kiac360f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/dd305e1b32bb/kiac360f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/43a515ddee0a/kiac360f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/524fae9acb3a/kiac360f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/f84c1c8c0fed/kiac360f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/ef1eb51cf61b/kiac360f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/9148a25749b1/kiac360f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/6517029ab186/kiac360f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/dd305e1b32bb/kiac360f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6911/9614460/43a515ddee0a/kiac360f7.jpg

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