Seed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds

Abstract Reduction of seed dormancy mechanisms, allowing for rapid germination after planting, is a recurrent trait in domesticated plants, and can often be linked to changes in seed coat structure, in particular thinning. We report evidence for seed coat thinning between 2,000 BC and 1,200 BC, in s...

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Autores principales:	Charlene Murphy, Dorian Q. Fuller
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c15398850feb428b8505485c5fa20f9f
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spelling	oai:doaj.org-article:c15398850feb428b8505485c5fa20f9f2021-12-02T16:07:57ZSeed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds10.1038/s41598-017-05244-w2045-2322https://doaj.org/article/c15398850feb428b8505485c5fa20f9f2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05244-whttps://doaj.org/toc/2045-2322Abstract Reduction of seed dormancy mechanisms, allowing for rapid germination after planting, is a recurrent trait in domesticated plants, and can often be linked to changes in seed coat structure, in particular thinning. We report evidence for seed coat thinning between 2,000 BC and 1,200 BC, in southern Indian archaeological horsegram (Macrotyloma uniflorum), which it has been possible to document with high precision and non-destructively, through high resolution x-ray computed tomography using a synchrotron. We find that this trait underwent stepped change, from thick to semi-thin to thin seed coats, and that the rate of change was gradual. This is the first time that the rate of evolution of seed coat thinning in a legume crop has been directly documented from archaeological remains, and it contradicts previous predictions that legume domestication occurred through selection of pre-adapted low dormancy phenotypes from the wild.Charlene MurphyDorian Q. FullerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Charlene Murphy Dorian Q. Fuller Seed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds
description	Abstract Reduction of seed dormancy mechanisms, allowing for rapid germination after planting, is a recurrent trait in domesticated plants, and can often be linked to changes in seed coat structure, in particular thinning. We report evidence for seed coat thinning between 2,000 BC and 1,200 BC, in southern Indian archaeological horsegram (Macrotyloma uniflorum), which it has been possible to document with high precision and non-destructively, through high resolution x-ray computed tomography using a synchrotron. We find that this trait underwent stepped change, from thick to semi-thin to thin seed coats, and that the rate of change was gradual. This is the first time that the rate of evolution of seed coat thinning in a legume crop has been directly documented from archaeological remains, and it contradicts previous predictions that legume domestication occurred through selection of pre-adapted low dormancy phenotypes from the wild.
format	article
author	Charlene Murphy Dorian Q. Fuller
author_facet	Charlene Murphy Dorian Q. Fuller
author_sort	Charlene Murphy
title	Seed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds
title_short	Seed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds
title_full	Seed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds
title_fullStr	Seed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds
title_full_unstemmed	Seed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds
title_sort	seed coat thinning during horsegram (macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c15398850feb428b8505485c5fa20f9f
work_keys_str_mv	AT charlenemurphy seedcoatthinningduringhorsegrammacrotylomauniflorumdomesticationdocumentedthroughsynchrotrontomographyofarchaeologicalseeds AT dorianqfuller seedcoatthinningduringhorsegrammacrotylomauniflorumdomesticationdocumentedthroughsynchrotrontomographyofarchaeologicalseeds
_version_	1718384683200282624

Seed coat thinning during horsegram (Macrotyloma uniflorum) domestication documented through synchrotron tomography of archaeological seeds

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