Evolution and palaeophysiology of the vascular system and other means of long-distance transport

Raven, JA

Evolution and palaeophysiology of the vascular system and other means of long-distance transport

Raven, JA

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Publication Type:: Journal Article
Citation:: Philosophical Transactions of the Royal Society B: Biological Sciences, 2018, 373 (1739)
Issue Date:: 2018-02-05

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Field	Value	Language
dc.contributor.author	Raven, JA https://orcid.org/0000-0002-2789-3297	en_US
dc.date.available	2017-07-11	en_US
dc.date.issued	2018-02-05	en_US
dc.identifier.citation	Philosophical Transactions of the Royal Society B: Biological Sciences, 2018, 373 (1739)	en_US
dc.identifier.issn	0962-8436	en_US
dc.identifier.uri	http://hdl.handle.net/10453/134364
dc.description.abstract	© 2017 The Author(s) Published by the Royal Society. All rights reserved. Photolithotrophic growth on land using atmospheric CO2 inevitably involves H2O vapour loss. Embryophytes greater than or equal to 100 mm tall are homoiohydric and endohydric with mass flow of aqueous solution through the xylem in tracheophytes. Structural details in Rhynie sporophytes enable modelling of the hydraulics of H2O supply to the transpiring surface, and the potential for gas exchange with the Devonian atmosphere. Xylem carrying H2O under tension involves programmed cell death, rigid cell walls and embolism repair; fossils provide little evidence on these functions other than the presence of lignin. The phenylalanine ammonia lyase essential for lignin synthesis came from horizontal gene transfer. Rhynie plants lack endodermes, limiting regulation of the supply of soil nutrients to shoots. The transfer of organic solutes from photosynthetic sites to growing and storage tissues involves mass flow through phloem in extant tracheophytes. Rhynie plants show little evidence of phloem; possible alternatives for transport of organic solutes are discussed. Extant examples of the arbuscular mycorrhizas found in Rhynie plants exchange soil-derived nutrients (especially P) for plant-derived organic matter, involving bidirectional mass flow along the hyphae. The aquatic cyanobacteria and the charalean Palaeonitella at Rhynie also have long-distance (relative to the size of the organism) transport.	en_US
dc.relation.ispartof	Philosophical Transactions of the Royal Society B: Biological Sciences	en_US
dc.relation.isbasedon	10.1098/rstb.2016.0497	en_US
dc.subject.classification	Evolutionary Biology	en_US
dc.subject.mesh	Biological Transport	en_US
dc.subject.mesh	Paleontology	en_US
dc.subject.mesh	Fossils	en_US
dc.subject.mesh	Scotland	en_US
dc.subject.mesh	Embryophyta	en_US
dc.subject.mesh	Plant Vascular Bundle	en_US
dc.title	Evolution and palaeophysiology of the vascular system and other means of long-distance transport	en_US
dc.type	Journal Article
utslib.citation.volume	1739	en_US
utslib.citation.volume	373	en_US
utslib.for	0602 Ecology	en_US
utslib.for	06 Biological Sciences	en_US
utslib.for	11 Medical and Health Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access
pubs.issue	1739	en_US
pubs.publication-status	Published	en_US
pubs.volume	373	en_US

Abstract:

© 2017 The Author(s) Published by the Royal Society. All rights reserved. Photolithotrophic growth on land using atmospheric CO2 inevitably involves H2O vapour loss. Embryophytes greater than or equal to 100 mm tall are homoiohydric and endohydric with mass flow of aqueous solution through the xylem in tracheophytes. Structural details in Rhynie sporophytes enable modelling of the hydraulics of H2O supply to the transpiring surface, and the potential for gas exchange with the Devonian atmosphere. Xylem carrying H2O under tension involves programmed cell death, rigid cell walls and embolism repair; fossils provide little evidence on these functions other than the presence of lignin. The phenylalanine ammonia lyase essential for lignin synthesis came from horizontal gene transfer. Rhynie plants lack endodermes, limiting regulation of the supply of soil nutrients to shoots. The transfer of organic solutes from photosynthetic sites to growing and storage tissues involves mass flow through phloem in extant tracheophytes. Rhynie plants show little evidence of phloem; possible alternatives for transport of organic solutes are discussed. Extant examples of the arbuscular mycorrhizas found in Rhynie plants exchange soil-derived nutrients (especially P) for plant-derived organic matter, involving bidirectional mass flow along the hyphae. The aquatic cyanobacteria and the charalean Palaeonitella at Rhynie also have long-distance (relative to the size of the organism) transport.

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http://hdl.handle.net/10453/134364