| Variation in seed traits of Lobelia inflata (Campanulaceae): sources and fitness consequences. | |
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MedLine Citation:
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PMID: 10636835 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Seed germination constitutes an important event in the life cycle of plants. Two related seed traits affect fitness: seed size and the timing of seed germination. In three sets of experiments, we (1) partition the sources of seed-size variance in Lobelia inflata into components attributable to fruit size, relative fruit position, and parental identity; (2) examine the influence of pregermination conditions and seed size on time to germination; and (3) assess the fitness consequences of seed size and germination timing under seminatural, harsh conditions. Seed-size variance is attributable to both parental identity and fruit position within an individual. Distal fruits produce larger but fewer seeds. No significant correlation exists between fruit size and seed size, but a trade-off is found between the number and size of seeds contained in a fruit after correcting for fruit size. The timing of germination is influenced by seed size, light conditions before winter, and winter duration. Germination timing influences survival, and despite small seed size in this species (2 × 10 g/seed), seed size has a persistent and significant association with both final plant size and the probability of survival to autumn. |
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Authors:
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A M Simons; M O Johnston |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American journal of botany Volume: 87 ISSN: 0002-9122 ISO Abbreviation: Am. J. Bot. Publication Date: 2000 Jan |
Date Detail:
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Created Date: 2011-06-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370467 Medline TA: Am J Bot Country: United States |
Other Details:
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Languages: eng Pagination: 124-32 Citation Subset: - |
Affiliation:
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Department of Biology, Life Sciences Centre, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J1. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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