Show simple item record

dc.contributor.authorDeng, Wenni
dc.contributor.authorJeng, Dong-Sheng
dc.contributor.authorToorop, Peter E
dc.contributor.authorSquire, Geoffrey R
dc.contributor.authorIannetta, Pietro PM
dc.date.accessioned2017-05-03T11:59:06Z
dc.date.available2017-05-03T11:59:06Z
dc.date.issued2012
dc.identifier.issn0305-7364
dc.identifier.doi10.1093/aob/mcr296
dc.identifier.urihttp://hdl.handle.net/10072/53944
dc.description.abstract栂ackground and Aims Myxospermy is a term which describes the ability of a seed to produce mucilage upon hydration. The mucilage is mainly comprised of plant cell-wall polysaccharides which are deposited during development of those cells that comprise the seed coat (testa). Myxospermy is more prevalent among those plant species adapted to surviving on arid sandy soils, though its significance in determining the ecological fitness of plants is unclear. In this study, the first mathematical model of myxospermous seed mucilage expansion is presented based on seeds of the model plant species Capsella bursa-pastoris (shepherd's purse). 栍ethods The structures underpinning the expansion process were described using light, electron and time-lapse confocal micrographs. The data and experimental observations were used to create a mathematical model of myxospermous seed mucilage expansion based on diffusion equations. 栋ey Results The mucilage expansion was rapid, taking 5 s, during which the cell mucilage volume increased 75-fold. At the level of the seed, this represented a 6-fold increase in seed volume and a 2.5-fold increase in seed surface area. These increases were shown to be a function of water uptake (16 g water g21 mucilage dry weight), and relaxation of the polymers which comprised the mucilage. In addition, the osmotic pressure of the seed mucilage, estimated by assessing the mucilage expansion of seeds hydrated in solutions of varying osmotic pressure, was -0.54 MPa (equivalent to 0.11 M or 6.6 g L21 NaCl). 惯nclusions The results showed that the mucilage may be characterized as hydrogel and seed-mucilage expansion may be modelled using the diffusion equation described. The potential of myxospermous seeds to affect the ecological services provided by soil is discussed briefly.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherOxford University Press
dc.publisher.placeUnited Kingdom
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom419
dc.relation.ispartofpageto427
dc.relation.ispartofissue2
dc.relation.ispartofjournalAnnals of Botany
dc.relation.ispartofvolume109
dc.rights.retentionY
dc.subject.fieldofresearchEcology
dc.subject.fieldofresearchPlant biology
dc.subject.fieldofresearchForestry sciences
dc.subject.fieldofresearchCivil geotechnical engineering
dc.subject.fieldofresearchcode3103
dc.subject.fieldofresearchcode3108
dc.subject.fieldofresearchcode3007
dc.subject.fieldofresearchcode400502
dc.titleA mathematical model of mucilage expansion in myxospermous seeds of Capsella bursa-pastoris (shepherd’s purse)
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2015-04-20T00:08:27Z
gro.hasfulltextNo Full Text
gro.griffith.authorJeng, Dong-Sheng


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record