A fossil record of land plant origins from charophyte algae

doi:10.1126/science.abj2927

GSTDTAP > 气候变化

DOI	10.1126/science.abj2927
	A fossil record of land plant origins from charophyte algae
	Paul K. Strother; Clinton Foster
	2021-08-13
发表期刊	Science
出版年	2021
英文摘要	Until now, the first fossil evidence of land plants was from the Devonian era 420 million years ago. However, molecular phylogenetic evidence has suggested an earlier origin in the Cambrian. Strother and Foster describe an assemblage of fossil spores from Ordivician deposits in Australia dating to approximately 480 million years ago (see the Perspective by Gensel). These spores are of intermediate morphology between confirmed land plant spores and earlier forms of uncertain relationship. This finding may help to resolve discrepancies between molecular and fossil data for the timing of land plant origins. Science , abj2927, this issue p. [792][1]; see also abl5297, p. [736][2] Molecular time trees indicating that embryophytes originated around 500 million years ago (Ma) during the Cambrian are at odds with the record of fossil plants, which first appear in the mid-Silurian almost 80 million years later. This time gap has been attributed to a missing fossil plant record, but that attribution belies the case for fossil spores. Here, we describe a Tremadocian (Early Ordovician, about 480 Ma) assemblage with elements of both Cambrian and younger embryophyte spores that provides a new level of evolutionary continuity between embryophytes and their algal ancestors. This finding suggests that the molecular phylogenetic signal retains a latent evolutionary history of the acquisition of the embryophytic developmental genome, a history that perhaps began during Ediacaran-Cambrian time but was not completed until the mid-Silurian (about 430 Ma). [1]: /lookup/doi/10.1126/science.abj2927 [2]: /lookup/doi/10.1126/science.abl5297
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/335885
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Paul K. Strother,Clinton Foster. A fossil record of land plant origins from charophyte algae[J]. Science,2021.
APA	Paul K. Strother,&Clinton Foster.(2021).A fossil record of land plant origins from charophyte algae.Science.
MLA	Paul K. Strother,et al."A fossil record of land plant origins from charophyte algae".Science (2021).