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Seed germination in Chrysophyllum sp. Nov., a large seeded rainforest species in north Queensland: Effects of seed size, litter depth and seed position

Green, P

Description

Leaf litter affects seed germination in many ways and past studies have shown greater impacts on relatively small seeds, both within and among species. In this shade-house experiment I examined the impact of forest litter on seed germination in Chrysophyllum sp. nov. (Sapotaceae), a large-seeded (2.4 g) rainforest tree from north Queensland. Seed mass varies more than 30-fold in this species, making it useful for studying the role of litter as a possible selective pressure in the evolution of...[Show more]

dc.contributor.authorGreen, P
dc.date.accessioned2015-12-13T23:40:35Z
dc.identifier.issn1442-9985
dc.identifier.urihttp://hdl.handle.net/1885/94537
dc.description.abstractLeaf litter affects seed germination in many ways and past studies have shown greater impacts on relatively small seeds, both within and among species. In this shade-house experiment I examined the impact of forest litter on seed germination in Chrysophyllum sp. nov. (Sapotaceae), a large-seeded (2.4 g) rainforest tree from north Queensland. Seed mass varies more than 30-fold in this species, making it useful for studying the role of litter as a possible selective pressure in the evolution of seed size in large-seeded species. Seeds of varying size (small, medium, large) were sown in planting boxes containing one of three litter levels (low, medium, high) and placed either below or on top of the litter. Seed size and litter biomass had no significant impact on the number of germinating seeds or the time to germination but seeds placed below the litter germinated around twice as frequently, and 20% sooner, than seeds placed on top of the litter. There were no significant interactions between any of the three factors. This shade-house experiment suggests that leaf litter is not an important selective pressure in the evolution of seed size in this species. However, if litter disturbance under field conditions differentially affects the probability of seed germination in relation to seed size and/or litter biomass, then litter could still act as a selective pressure in the evolution of seed size in Chrysophyllum and other large-seeded species.
dc.publisherBlackwell Science Asia
dc.sourceAustral Ecology
dc.subjectKeywords: Chrysophyllum sp. nov.; Large-seeded species; Leaf litter; Rainforest; Seed germination; Seed size
dc.titleSeed germination in Chrysophyllum sp. Nov., a large seeded rainforest species in north Queensland: Effects of seed size, litter depth and seed position
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume24
dc.date.issued1999
local.identifier.absfor060705 - Plant Physiology
local.identifier.ariespublicationMigratedxPub24142
local.type.statusPublished Version
local.contributor.affiliationGreen, P, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage608
local.bibliographicCitation.lastpage613
local.identifier.doi10.1046/j.1442-9993.1999.00994.x
dc.date.updated2015-12-12T09:29:44Z
local.identifier.scopusID2-s2.0-17944367546
CollectionsANU Research Publications

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