Samara water absorption and floatation in sheoaks, Casuarina and Allocasuarina (Casuarinaceae)

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dc.contributor.authorRiley, Ian T.
dc.contributor.authorQureshi, Moin
dc.date.accessioned2024-11-07T10:40:12Z
dc.date.available2024-11-07T10:40:12Z
dc.date.issued2022
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractDiaspores (samaras) of the sheoaks, Casuarina and Allocasuarina, have a mesocarp composed of hydrophilic fibres that, in Allocasuarina, rapidly expand on wetting, capturing significant quantities of water. The ecological function of this water capturing has been the subject of speculation but not quantification or experimentation. Therefore, the rate and quantity of water absorbed, and the floatation properties of samaras of accessions of Casuarina and Allocasuarina were assessed. Casuarina absorbed water slowly (~48 h) with median absorption of 90% (by weight) whereas Allocasuarina absorbed water rapidly (<2 min) with median absorption of 240%. The process was reversible and increasing in Allocasuarina, with median absorption reaching 400% over three to five wetting/drying cycles. The floating half-life of Casuarina and Allocasuarina samaras overlapped, 17-70 and 29-57 h, respectively, so Casuarina samaras were not shown to be better adapted to hydrochory. Based on five accessions of each genus, it does not be appear that water-capturing of sheoak samaras is directly related to habitat aridity, nor to potential hydrochory. Therefore, the ecological implications of differential water-capturing of sheoak samaras remains to be determined. © 2021 Ian T. Riley, Moin Qureshi
dc.identifier.doi10.4081/NHS.2022.541
dc.identifier.endpage10
dc.identifier.issn2385-0442
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85127870153
dc.identifier.scopusqualityQ3
dc.identifier.startpage3
dc.identifier.urihttps://doi.org/10.4081/NHS.2022.541
dc.identifier.urihttps://hdl.handle.net/11480/11507
dc.identifier.volume9
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPage Press Publications
dc.relation.ispartofNatural History Sciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241106
dc.subjectAllocasuarina
dc.subjectCasuarina
dc.subjectdiaspore
dc.subjectfloatation
dc.subjecthydrochory
dc.subjectsamara
dc.subjectwater absorption
dc.titleSamara water absorption and floatation in sheoaks, Casuarina and Allocasuarina (Casuarinaceae)
dc.title.alternativeAssorbimento di acqua e galleggiamento delle samare in Casuarina e Allocasuarina (Casuarinaceae)
dc.typeArticle

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