Differences in seed dormancy and germination in amphicarpic legumes: Manifold bet-hedging in space and time
[Aims]: Dispersal through space or time via dormancy is one of the primary processes whereby organisms can influence the environment they experience. In plants, strong evolutionary correlations are expected between the two kinds of dispersal because both are performed by the seeds and play comparable adaptive roles. In this paper, we investigated these evolutionary correlations using amphicarpic plants, which simultaneously produce aerial seeds with high spatial dispersal propensity and subterranean seeds that do not disperse. [Methods]: We investigated the variation in dormancy and germination in aerial and subterranean seeds of two amphicarpic legumes (Vicia amphicarpa L. and Lathyrus amphicarpos L.) and two closely related homocarpic taxa (Vicia sativa L. and Lathyrus cicera L.) by estimating germination percentages following different combinations of dormancy breaking treatments (i.e. dry after-ripening, cold stratification and physical scarification). [Important Findings]: Our results showed complex interactions between spatial and temporal dispersal. Right after dispersal, aerial seeds were more dormant than their subterranean counterparts, but this trend reversed with after-ripening, as seeds developed physical dormancy. Seeds of homocarpic plants germinated at higher percentages than those of their amphicarpic congeners and lost dormancy homogeneously with after-ripening. Conversely, amphicarpic seeds exhibited varied dormancy strategies modulated by both physiological and physical dormancy. These are expected to increase variation in emergence timing, providing multiple levels of diversifying bet-hedging. This strategy might be adaptive under highly unpredictable conditions by enabling plants to rely on historically favorable sites in good seasons without preventing spatial and temporal migration.
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Oxford University Press
2021-08
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Subjects: | Amphicarpy dormancy/colonization trade-off, Amphicarpic legumes, Environmental heterogeneity, Seed dormancy and germination, Mediterranean environments, |
Online Access: | http://hdl.handle.net/10261/266279 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011011 http://dx.doi.org/10.13039/501100003329 |
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dig-cide-es-10261-2662792022-04-06T01:49:09Z Differences in seed dormancy and germination in amphicarpic legumes: Manifold bet-hedging in space and time Sánchez‑Martín, Ricardo Gómez, José María Cheptou, Pierre-Olivier Rubio de Casas, Rafael Ministerio de Economía y Competitividad (España) European Commission Junta de Andalucía Amphicarpy dormancy/colonization trade-off Amphicarpic legumes Environmental heterogeneity Seed dormancy and germination Mediterranean environments [Aims]: Dispersal through space or time via dormancy is one of the primary processes whereby organisms can influence the environment they experience. In plants, strong evolutionary correlations are expected between the two kinds of dispersal because both are performed by the seeds and play comparable adaptive roles. In this paper, we investigated these evolutionary correlations using amphicarpic plants, which simultaneously produce aerial seeds with high spatial dispersal propensity and subterranean seeds that do not disperse. [Methods]: We investigated the variation in dormancy and germination in aerial and subterranean seeds of two amphicarpic legumes (Vicia amphicarpa L. and Lathyrus amphicarpos L.) and two closely related homocarpic taxa (Vicia sativa L. and Lathyrus cicera L.) by estimating germination percentages following different combinations of dormancy breaking treatments (i.e. dry after-ripening, cold stratification and physical scarification). [Important Findings]: Our results showed complex interactions between spatial and temporal dispersal. Right after dispersal, aerial seeds were more dormant than their subterranean counterparts, but this trend reversed with after-ripening, as seeds developed physical dormancy. Seeds of homocarpic plants germinated at higher percentages than those of their amphicarpic congeners and lost dormancy homogeneously with after-ripening. Conversely, amphicarpic seeds exhibited varied dormancy strategies modulated by both physiological and physical dormancy. These are expected to increase variation in emergence timing, providing multiple levels of diversifying bet-hedging. This strategy might be adaptive under highly unpredictable conditions by enabling plants to rely on historically favorable sites in good seasons without preventing spatial and temporal migration. This research was supported by the Spanish Ministries of Science, Innovation and Universities (FPU grant FPU17/00629 awarded to R.S.M.) and of Economy and Competitiveness (grant CGL2016-79950-R) including FEDER funds as well as by the Junta de Andalucía/FP7 Talentia program. 2022-04-05T09:40:03Z 2022-04-05T09:40:03Z 2021-08 2022-04-05T09:40:03Z artículo http://purl.org/coar/resource_type/c_6501 Journal of Plant Ecology 14(4): 662-672 (2021) 1752-9921 http://hdl.handle.net/10261/266279 10.1093/jpe/rtab019 1752-993X http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011011 http://dx.doi.org/10.13039/501100003329 #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement////CGL2016-79950-R Preprint http://dx.doi.org/10.1093/jpe/rtab019 Sí open Oxford University Press |
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Amphicarpy dormancy/colonization trade-off Amphicarpic legumes Environmental heterogeneity Seed dormancy and germination Mediterranean environments Amphicarpy dormancy/colonization trade-off Amphicarpic legumes Environmental heterogeneity Seed dormancy and germination Mediterranean environments |
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Amphicarpy dormancy/colonization trade-off Amphicarpic legumes Environmental heterogeneity Seed dormancy and germination Mediterranean environments Amphicarpy dormancy/colonization trade-off Amphicarpic legumes Environmental heterogeneity Seed dormancy and germination Mediterranean environments Sánchez‑Martín, Ricardo Gómez, José María Cheptou, Pierre-Olivier Rubio de Casas, Rafael Differences in seed dormancy and germination in amphicarpic legumes: Manifold bet-hedging in space and time |
description |
[Aims]: Dispersal through space or time via dormancy is one of the primary processes whereby organisms can influence the environment they experience. In plants, strong evolutionary correlations are expected between the two kinds of dispersal because both are performed by the seeds and play comparable adaptive roles. In this paper, we investigated these evolutionary correlations using amphicarpic plants, which simultaneously produce aerial seeds with high spatial dispersal propensity and subterranean seeds that do not disperse.
[Methods]: We investigated the variation in dormancy and germination in aerial and subterranean seeds of two amphicarpic legumes (Vicia amphicarpa L. and Lathyrus amphicarpos L.) and two closely related homocarpic taxa (Vicia sativa L. and Lathyrus cicera L.) by estimating germination percentages following different combinations of dormancy breaking treatments (i.e. dry after-ripening, cold stratification and physical scarification).
[Important Findings]: Our results showed complex interactions between spatial and temporal dispersal. Right after dispersal, aerial seeds were more dormant than their subterranean counterparts, but this trend reversed with after-ripening, as seeds developed physical dormancy. Seeds of homocarpic plants germinated at higher percentages than those of their amphicarpic congeners and lost dormancy homogeneously with after-ripening. Conversely, amphicarpic seeds exhibited varied dormancy strategies modulated by both physiological and physical dormancy. These are expected to increase variation in emergence timing, providing multiple levels of diversifying bet-hedging. This strategy might be adaptive under highly unpredictable conditions by enabling plants to rely on historically favorable sites in good seasons without preventing spatial and temporal migration. |
author2 |
Ministerio de Economía y Competitividad (España) |
author_facet |
Ministerio de Economía y Competitividad (España) Sánchez‑Martín, Ricardo Gómez, José María Cheptou, Pierre-Olivier Rubio de Casas, Rafael |
format |
artículo |
topic_facet |
Amphicarpy dormancy/colonization trade-off Amphicarpic legumes Environmental heterogeneity Seed dormancy and germination Mediterranean environments |
author |
Sánchez‑Martín, Ricardo Gómez, José María Cheptou, Pierre-Olivier Rubio de Casas, Rafael |
author_sort |
Sánchez‑Martín, Ricardo |
title |
Differences in seed dormancy and germination in amphicarpic legumes: Manifold bet-hedging in space and time |
title_short |
Differences in seed dormancy and germination in amphicarpic legumes: Manifold bet-hedging in space and time |
title_full |
Differences in seed dormancy and germination in amphicarpic legumes: Manifold bet-hedging in space and time |
title_fullStr |
Differences in seed dormancy and germination in amphicarpic legumes: Manifold bet-hedging in space and time |
title_full_unstemmed |
Differences in seed dormancy and germination in amphicarpic legumes: Manifold bet-hedging in space and time |
title_sort |
differences in seed dormancy and germination in amphicarpic legumes: manifold bet-hedging in space and time |
publisher |
Oxford University Press |
publishDate |
2021-08 |
url |
http://hdl.handle.net/10261/266279 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011011 http://dx.doi.org/10.13039/501100003329 |
work_keys_str_mv |
AT sanchezmartinricardo differencesinseeddormancyandgerminationinamphicarpiclegumesmanifoldbethedginginspaceandtime AT gomezjosemaria differencesinseeddormancyandgerminationinamphicarpiclegumesmanifoldbethedginginspaceandtime AT cheptoupierreolivier differencesinseeddormancyandgerminationinamphicarpiclegumesmanifoldbethedginginspaceandtime AT rubiodecasasrafael differencesinseeddormancyandgerminationinamphicarpiclegumesmanifoldbethedginginspaceandtime |
_version_ |
1777665608533409792 |