荚荚苔藓潮间带适应的基因组学见解

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2025-03-20 DOI:10.1111/nph.70083

Peng Xu, Xueyang Liu, Lei Ke, Kunpeng Li, Wenda Wang, Yuannian Jiao

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引用次数: 0

摘要

许多海洋绿藻在潮间带茁壮成长，适应在水下低光和强烈阳光之间波动的复杂光环境。探索它们的基因组基础可以帮助理解适应策略的多样性，以应对环境压力。在这里，我们开发了一种新颖实用的策略来组装高可信度的藻类基因组，并对高质量的球囊苔藓藻基因组进行了测序，球囊苔藓藻是一种起源于6.78亿年前的绿藻苔藓目潮间带大型藻类。比较基因组分析揭示了一个以前被忽视的全基因组重复事件在一个密切相关的物种，小扁豆蕨。通过水平基因转移共获得100个基因，其中包括隐花色素光感受器CRY基因的同源基因。我们还发现，所有四种苔藓植物都缺乏参与叶黄素循环和能量依赖猝灭过程的关键光保护基因（LHCSR, PsbS， CYP97A3和VDE）。研究结果表明，光收集天线基因的扩增和虹膜黄质和虹膜黄质的生物合成途径可能有助于其适应潮间带光条件。我们的研究揭示了苔藓适应潮间带环境的特殊遗传基础，促进了我们对植物适应进化的理解。

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The genomic insights of intertidal adaptation in Bryopsis corticulans

Many marine green algae thrive in intertidal zones, adapting to complex light environments that fluctuate between low underwater light and intense sunlight. Exploring their genomic bases could help to comprehend the diversity of adaptation strategies in response to environmental pressures.
Here, we developed a novel and practical strategy to assemble high-confidence algal genomes and sequenced a high-quality genome of Bryopsis corticulans, an intertidal zone macroalga in the Bryopsidales order of Chlorophyta that originated 678 million years ago.
Comparative genomic analyses revealed a previously overlooked whole genome duplication event in a closely related species, Caulerpa lentillifera. A total of 100 genes were acquired through horizontal gene transfer, including a homolog of the cryptochrome photoreceptor CRY gene. We also found that all four species studied in Bryopsidales lack key photoprotective genes (LHCSR, PsbS, CYP97A3, and VDE) involved in the xanthophyll cycle and energy-dependent quenching processes. We elucidated that the expansion of light-harvesting antenna genes and the biosynthesis pathways for siphonein and siphonaxanthin in B. corticulans likely contribute to its adaptation to intertidal light conditions.
Our study unraveled the underlying special genetic basis of Bryopsis' adaptation to intertidal environments, advancing our understanding of plant adaptive evolution.

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.