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Precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (Agriophyllum squarrosum)

Sand rice (Agriophyllum squarrosum) is widely distributed on dunes in the Asian interior arid zone, and its large intraspecific trait variation makes it a very good model for investigating the ecological processes underlying its adaptation to the desert environment. In this study, seed size variatio...

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Autores principales: Zhao, Pengshan, Li, Xiaofeng, Ran, Ruilan, Sun, Hong, Zhao, Jiecai, Chen, Guoxiong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9467651/
https://www.ncbi.nlm.nih.gov/pubmed/35603725
http://dx.doi.org/10.1093/jxb/erac231
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author Zhao, Pengshan
Li, Xiaofeng
Ran, Ruilan
Sun, Hong
Zhao, Jiecai
Chen, Guoxiong
author_facet Zhao, Pengshan
Li, Xiaofeng
Ran, Ruilan
Sun, Hong
Zhao, Jiecai
Chen, Guoxiong
author_sort Zhao, Pengshan
collection PubMed
description Sand rice (Agriophyllum squarrosum) is widely distributed on dunes in the Asian interior arid zone, and its large intraspecific trait variation makes it a very good model for investigating the ecological processes underlying its adaptation to the desert environment. In this study, seed size variation across 68 natural populations was used to establish geographic patterns and to quantify the effects of the climate, soil, and collection-year weather variables. The length of the seed major axis and thousand seed weight (TSW) both showed significant longitudinal patterns. Long-term climate variables accounted for most of the explained variances for seed major axis (57.20%) and TSW (91.54%). Specifically, annual precipitation and minimum monthly precipitation had the most significantly positive and negative effects, indicating that longitudinal clines are driven by a precipitation gradient across the species’ distribution range. A substantial unique effect of soil variables (27.27%) was found for seed major axis variation, but only 3.64% of TSW variation was explained by soil variables. Two extreme groups were selected to evaluate the genetic and plastic effects on seed size in a common garden experiment. Large-seeded individuals were more competitive in semi-arid regions, and had stronger adaptive plasticity as well as better performance in early seedling establishment, and hence they have potential for use in future domestication projects.
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spelling pubmed-94676512022-09-13 Precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (Agriophyllum squarrosum) Zhao, Pengshan Li, Xiaofeng Ran, Ruilan Sun, Hong Zhao, Jiecai Chen, Guoxiong J Exp Bot Research Papers Sand rice (Agriophyllum squarrosum) is widely distributed on dunes in the Asian interior arid zone, and its large intraspecific trait variation makes it a very good model for investigating the ecological processes underlying its adaptation to the desert environment. In this study, seed size variation across 68 natural populations was used to establish geographic patterns and to quantify the effects of the climate, soil, and collection-year weather variables. The length of the seed major axis and thousand seed weight (TSW) both showed significant longitudinal patterns. Long-term climate variables accounted for most of the explained variances for seed major axis (57.20%) and TSW (91.54%). Specifically, annual precipitation and minimum monthly precipitation had the most significantly positive and negative effects, indicating that longitudinal clines are driven by a precipitation gradient across the species’ distribution range. A substantial unique effect of soil variables (27.27%) was found for seed major axis variation, but only 3.64% of TSW variation was explained by soil variables. Two extreme groups were selected to evaluate the genetic and plastic effects on seed size in a common garden experiment. Large-seeded individuals were more competitive in semi-arid regions, and had stronger adaptive plasticity as well as better performance in early seedling establishment, and hence they have potential for use in future domestication projects. Oxford University Press 2022-05-23 /pmc/articles/PMC9467651/ /pubmed/35603725 http://dx.doi.org/10.1093/jxb/erac231 Text en © The Author(s) 2022. Published by Oxford University Press on behalf of the Society for Experimental Biology. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Papers
Zhao, Pengshan
Li, Xiaofeng
Ran, Ruilan
Sun, Hong
Zhao, Jiecai
Chen, Guoxiong
Precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (Agriophyllum squarrosum)
title Precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (Agriophyllum squarrosum)
title_full Precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (Agriophyllum squarrosum)
title_fullStr Precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (Agriophyllum squarrosum)
title_full_unstemmed Precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (Agriophyllum squarrosum)
title_short Precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (Agriophyllum squarrosum)
title_sort precipitation and local environment shape the geographic variation of seed size across natural populations of sand rice (agriophyllum squarrosum)
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9467651/
https://www.ncbi.nlm.nih.gov/pubmed/35603725
http://dx.doi.org/10.1093/jxb/erac231
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