高抗逆性海参及其近缘种(水杨科:苋科)的耐寒性进化

IF 2.3 2区 生物学 Q2 PLANT SCIENCES
Ruben Cousins-Westerberg, Nicole Dakin, Laura Schat, G. Kadereit, A. M. Humphreys
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引用次数: 0

摘要

低温是植物分布的主要障碍之一,将许多分支限制在其祖先的热带生物群落中。然而,最近的证据表明,从热带生物群落到温带生物群落的转变可能比以前想象的更频繁。在这里,我们研究了全球分布且高度耐胁迫的杨柳科(杨柳亚科,苋科s.l.)的抗寒性和抗冻性的进化。我们首先使用新生成的(n = 106)和已发表的核核糖体和质体序列。接下来,我们使用地理发生数据来记录耐寒物种的分支和地理区域,并重建耐寒性是如何进化的。最后,我们测试了耐霜性和年度生命形式之间的相关进化。我们发现,在北半球多达四个谱系中,耐霜性是独立进化的,但一年生植物与多年生植物相比,不太可能进化出耐霜性,这表明存在不同的适应寒冷环境的策略。我们的发现为开花植物近亲之间的多次独立的热带外过渡提供了越来越多的证据,并对杨柳科植物适应低温的生态和生理机制提出了新的问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evolution of cold tolerance in the highly stress-tolerant samphires and relatives (Salicornieae: Amaranthaceae)
Low temperature constitutes one of the main barriers to plant distributions, confining many clades to their ancestrally tropical biome. However, recent evidence suggests that transitions from tropical to temperate biomes may be more frequent than previously thought. Here, we study the evolution of cold and frost tolerance in the globally distributed and highly stress-tolerant Salicornieae (Salicornioideae, Amaranthaceae s.l.). We first generate a phylogenetic tree comprising almost all known species (85-90%), using newly generated (n = 106) and published nuclear-ribosomal and plastid sequences. Next, we use geographical occurrence data to document in which clades and geographical regions cold-tolerant species occur and reconstruct how cold tolerance evolved. Finally, we test for correlated evolution between frost tolerance and the annual life form. We find that frost tolerance has evolved independently in up to four Northern Hemisphere lineages but that annuals are no more likely to evolve frost tolerance than perennials, indicating the presence of different strategies for adapting to cold environments. Our findings add to mounting evidence for multiple independent out-of-the-tropics transitions among close relatives of flowering plants and raise new questions about the ecological and physiological mechanism(s) of adaptation to low temperatures in Salicornieae.
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来源期刊
CiteScore
5.70
自引率
8.30%
发文量
54
审稿时长
3.5 months
期刊介绍: The Botanical Journal of the Linnean Society publishes original papers on systematic and evolutionary botany and comparative studies of both living and fossil plants. Review papers are also welcomed which integrate fields such as cytology, morphogenesis, palynology and phytochemistry into a taxonomic framework. The Journal will only publish new taxa in exceptional circumstances or as part of larger monographic or phylogenetic revisions.
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