Full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance
Seeds of many coastal plants can survive exposure to seawater and may be dispersed long distances by the ocean. The salt tolerance or avoidance strategies of seeds are poorly understood, even though these traits may fundamentally influence dispersal and recruitment in coastal dunes. This research ai...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Wiley-Blackwell Publishing Ltd
2013
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/40426 |
| _version_ | 1848755868271640576 |
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| author | Guja, Lydia Wuhrer, R. Moran, K. Dixon, K. Wardell-Johnson, Grant Merritt, David |
| author_facet | Guja, Lydia Wuhrer, R. Moran, K. Dixon, K. Wardell-Johnson, Grant Merritt, David |
| author_sort | Guja, Lydia |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Seeds of many coastal plants can survive exposure to seawater and may be dispersed long distances by the ocean. The salt tolerance or avoidance strategies of seeds are poorly understood, even though these traits may fundamentally influence dispersal and recruitment in coastal dunes. This research aimed to demonstrate how salt exclusion or localization within germinating seeds may affect salt tolerance. To determine the response of seeds to external salinity during imbibition (water uptake), it was necessary to quantify uptake and spatially resolve the internal distribution of salt. Flame photometry was used to quantify salt concentration in imbibing seeds and a new application of full-spectrum X-ray mapping allowed visualization of the spatial distribution and relative abundance of salt. As external salinity increased, salt-sensitive Spyridium globulosum (Rhamnaceae) seeds accumulated sodium and chlorine in the seed embryo, while potassium was increasingly displaced and germination was reduced. Conversely, salt-tolerant Ficinia nodosa (Cyperaceae) seeds avoided ion uptake and germination was not affected by imbibition in high sodium chloride (NaCl) concentrations. These results provide insight into mechanisms of salt tolerance/avoidance during imbibition and early germination and suggest that oceanic dispersal can be a viable explanation for the distribution of some plant species. |
| first_indexed | 2025-11-14T09:03:08Z |
| format | Journal Article |
| id | curtin-20.500.11937-40426 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:03:08Z |
| publishDate | 2013 |
| publisher | Wiley-Blackwell Publishing Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-404262017-09-13T15:59:41Z Full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance Guja, Lydia Wuhrer, R. Moran, K. Dixon, K. Wardell-Johnson, Grant Merritt, David imbibition oceanic dispersal knotted club rush seed germination hydrochory basket bush Spyridium globulosum Ficinia nodosa coast Seeds of many coastal plants can survive exposure to seawater and may be dispersed long distances by the ocean. The salt tolerance or avoidance strategies of seeds are poorly understood, even though these traits may fundamentally influence dispersal and recruitment in coastal dunes. This research aimed to demonstrate how salt exclusion or localization within germinating seeds may affect salt tolerance. To determine the response of seeds to external salinity during imbibition (water uptake), it was necessary to quantify uptake and spatially resolve the internal distribution of salt. Flame photometry was used to quantify salt concentration in imbibing seeds and a new application of full-spectrum X-ray mapping allowed visualization of the spatial distribution and relative abundance of salt. As external salinity increased, salt-sensitive Spyridium globulosum (Rhamnaceae) seeds accumulated sodium and chlorine in the seed embryo, while potassium was increasingly displaced and germination was reduced. Conversely, salt-tolerant Ficinia nodosa (Cyperaceae) seeds avoided ion uptake and germination was not affected by imbibition in high sodium chloride (NaCl) concentrations. These results provide insight into mechanisms of salt tolerance/avoidance during imbibition and early germination and suggest that oceanic dispersal can be a viable explanation for the distribution of some plant species. 2013 Journal Article http://hdl.handle.net/20.500.11937/40426 10.1111/boj.12072 Wiley-Blackwell Publishing Ltd unknown |
| spellingShingle | imbibition oceanic dispersal knotted club rush seed germination hydrochory basket bush Spyridium globulosum Ficinia nodosa coast Guja, Lydia Wuhrer, R. Moran, K. Dixon, K. Wardell-Johnson, Grant Merritt, David Full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance |
| title | Full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance |
| title_full | Full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance |
| title_fullStr | Full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance |
| title_full_unstemmed | Full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance |
| title_short | Full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance |
| title_sort | full spectrum x-ray mapping reveals differential localization of salt in germinating seeds of differing salt tolerance |
| topic | imbibition oceanic dispersal knotted club rush seed germination hydrochory basket bush Spyridium globulosum Ficinia nodosa coast |
| url | http://hdl.handle.net/20.500.11937/40426 |