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飞狐猴树蕨基因组为研究蕨类植物进化和乔木状起源提供了线索。

The flying spider-monkey tree fern genome provides insights into fern evolution and arborescence.

机构信息

State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China.

Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China.

出版信息

Nat Plants. 2022 May;8(5):500-512. doi: 10.1038/s41477-022-01146-6. Epub 2022 May 9.

DOI:10.1038/s41477-022-01146-6
PMID:35534720
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9122828/
Abstract

To date, little is known about the evolution of fern genomes, with only two small genomes published from the heterosporous Salviniales. Here we assembled the genome of Alsophila spinulosa, known as the flying spider-monkey tree fern, onto 69 pseudochromosomes. The remarkable preservation of synteny, despite resulting from an ancient whole-genome duplication over 100 million years ago, is unprecedented in plants and probably speaks to the uniqueness of tree ferns. Our detailed investigations into stem anatomy and lignin biosynthesis shed new light on the evolution of stem formation in tree ferns. We identified a phenolic compound, alsophilin, that is abundant in xylem, and we provided the molecular basis for its biosynthesis. Finally, analysis of demographic history revealed two genetic bottlenecks, resulting in rapid demographic declines of A. spinulosa. The A. spinulosa genome fills a crucial gap in the plant genomic landscape and helps elucidate many unique aspects of tree fern biology.

摘要

迄今为止，人们对蕨类植物基因组的演化知之甚少，仅有来自异型孢子的 Salviniales 发表的两个小基因组。在这里，我们将被称为飞蛛猴树蕨的桫椤的基因组组装到 69 个假染色体上。尽管这是 1 亿多年前的古老全基因组复制的结果，但这种非同寻常的同线性保存是植物界前所未有的，可能反映了树蕨的独特性。我们对茎解剖结构和木质素生物合成的详细研究为树蕨茎的形成进化提供了新的线索。我们鉴定了一种在木质部中丰富存在的酚类化合物，桫椤醇，并为其生物合成提供了分子基础。最后，对人口历史的分析揭示了两个遗传瓶颈，导致桫椤的种群迅速减少。桫椤基因组填补了植物基因组景观中的一个关键空白，有助于阐明树蕨生物学的许多独特方面。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/9122828/3eb849bda3c5/41477_2022_1146_Fig13_ESM.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/9122828/7d6801abb512/41477_2022_1146_Fig7_ESM.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/9122828/4a2b47461c7e/41477_2022_1146_Fig8_ESM.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/9122828/c80846435bfb/41477_2022_1146_Fig9_ESM.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/9122828/4ff68a7b3b14/41477_2022_1146_Fig10_ESM.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/9122828/470d3de10539/41477_2022_1146_Fig11_ESM.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/9122828/6802c5903731/41477_2022_1146_Fig12_ESM.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/9122828/3eb849bda3c5/41477_2022_1146_Fig13_ESM.jpg

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