Show simple item record

dc.contributor.authorEl-Amhir, S.
dc.contributor.authorLamont, Byron
dc.contributor.authorHe, Tianhua
dc.contributor.authorYan, G.
dc.identifier.citationEl-Amhir, S. and Lamont, B. and He, T. and Yan, G. 2017. Small-seeded Hakea species tolerate cotyledon loss better than large-seeded congeners. Scientific Reports. 7: Article No 41520.

Six Hakea species varying greatly in seed size were selected for cotyledon damage experiments. The growth of seedlings with cotyledons partially or completely removed was monitored over 90 days. All seedlings perished by the fifth week when both cotyledons were removed irrespective of seed size. Partial removal of cotyledons caused a significant delay in the emergence of the first leaf, and reduction in root and shoot growth of the large-seeded species. The growth of seedlings of small-seeded species was less impacted by cotyledon damage. The rate of survival, root and shoot lengths and dry biomass of the seedlings were determined after 90 days. When seedlings were treated with balanced nutrient solutions following removal of the cotyledons, survival was 95-98%, but 0% when supplied with nutrient solutions lacking N or P or with water only. The addition of a balanced nutrient solution failed to restore complete growth of any species, but the rate of root elongation for the small-seeded species was maintained. Cotyledons provide nutrients to support early growth of Hakea seedlings, but other physiological roles for the cotyledons are also implicated. In conclusion, small-seeded Hakea species can tolerate cotyledons loss better than large-seeded species.

dc.publisherNature Publishing Group
dc.titleSmall-seeded Hakea species tolerate cotyledon loss better than large-seeded congeners.
dc.typeJournal Article
dcterms.source.titleScientific Reports
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering

Files in this item


This item appears in the following Collection(s)

Show simple item record
Except where otherwise noted, this item's license is described as