Variation in seed dormancy in Echinochloa and the development of a standard protocol for germination testing
dc.contributor.author | Widrlechner, Mark | |
dc.contributor.author | Widrlechner, Mark | |
dc.contributor.author | Brenner, David | |
dc.contributor.author | Brenner, David | |
dc.contributor.department | North Central Regional Plant Introduction Station | |
dc.date | 2018-02-13T05:26:42.000 | |
dc.date.accessioned | 2020-06-30T06:10:38Z | |
dc.date.available | 2020-06-30T06:10:38Z | |
dc.date.embargo | 2013-02-02 | |
dc.date.issued | 2010-10-01 | |
dc.description.abstract | <p>The North Central Regional Plant Introduction Station maintains more than 300 accessions of <em>Echinochloa</em> representing 15 species from a diverse cross-section of nations and growing conditions from around the world. With such a diverse collection, no single germination-testing protocol was adequate for accurately assessing their viability. By manipulating light conditions, we determined that some accessions were light-requiring and others were dark-requiring. However, no pattern was found for this response based on taxonomy or improvement status. Most accessions tested showed optimal germination when tests were conducted between 25 to 30°C, but both positive and negative photoblastic responses were sometimes expressed, even at lower temperatures. A sequential treatment of darkness followed by light revealed that skotodormancy (dormancy caused by darkness) was being induced in light-requiring seeds. Similarly, a sequential treatment with light followed by darkness revealed that photodormancy (dormancy caused by light) was being induced in dark-requiring seeds. Thus, without prior knowledge of the light requirements of a particular accession, we conclude that a side-by-side germination test where two replicates receive periodic light (12 hours at 30°C / 12 hours dark at 20°C) and the other two are tested in darkness (12 hours at 30°C / 12 hours at 20°C) is best for <em>Echinochloa</em>. This approach is recommended for germplasm centers, seed-testing laboratories, and others working with genetically and geographically diverse <em>Echinochloa</em> seed lots.</p> | |
dc.description.comments | <p>This article is from <em>Seed Science and Technology </em>38, no. 3 (October 2010): 559–571.</p> | |
dc.format.mimetype | application/pdf | |
dc.identifier | archive/lib.dr.iastate.edu/ncrpis_pubs/17/ | |
dc.identifier.articleid | 1017 | |
dc.identifier.contextkey | 3644554 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | ncrpis_pubs/17 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/55994 | |
dc.language.iso | en | |
dc.source.bitstream | archive/lib.dr.iastate.edu/ncrpis_pubs/17/Widrlechner_2010_VariationSeedDormancy.pdf|||Fri Jan 14 21:09:10 UTC 2022 | |
dc.subject.disciplines | Agricultural Science | |
dc.subject.disciplines | Agriculture | |
dc.subject.disciplines | Agronomy and Crop Sciences | |
dc.subject.disciplines | Horticulture | |
dc.subject.disciplines | Plant Sciences | |
dc.title | Variation in seed dormancy in Echinochloa and the development of a standard protocol for germination testing | |
dc.type | article | |
dc.type.genre | article | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | e7008109-4121-4167-803e-20e326fb668e | |
relation.isAuthorOfPublication | a40d8542-37dd-4fef-9a9e-521123110cc9 | |
relation.isOrgUnitOfPublication | 8dcf3b33-db2f-46f8-8b80-20844d33fa84 |
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