Optimality of the Münch mechanism for translocation of sugars in plants

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Optimality of the Münch mechanism for translocation of sugars in plants. / Jensen, Kåre Hartvig; Lee, J.; Bohr, Tomas; Bruus, Henrik; Holbrook, N. M.; Zwieniecki, M. A.

In: Journal of the Royal Society. Interface, Vol. 8, No. 61, 2011, p. 1155-1165.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Author

Jensen, Kåre Hartvig; Lee, J.; Bohr, Tomas; Bruus, Henrik; Holbrook, N. M.; Zwieniecki, M. A. / Optimality of the Münch mechanism for translocation of sugars in plants.

In: Journal of the Royal Society. Interface, Vol. 8, No. 61, 2011, p. 1155-1165.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{987c47ce9e7e4b5ca1cd6a3f4483442c,
title = "Optimality of the Münch mechanism for translocation of sugars in plants",
publisher = "The/Royal Society",
author = "Jensen, {Kåre Hartvig} and J. Lee and Tomas Bohr and Henrik Bruus and Holbrook, {N. M.} and Zwieniecki, {M. A.}",
year = "2011",
doi = "10.1098/rsif.2010.0578",
volume = "8",
number = "61",
pages = "1155--1165",
journal = "Journal of the Royal Society. Interface",
issn = "1742-5689",

}

RIS

TY - JOUR

T1 - Optimality of the Münch mechanism for translocation of sugars in plants

A1 - Jensen,Kåre Hartvig

A1 - Lee,J.

A1 - Bohr,Tomas

A1 - Bruus,Henrik

A1 - Holbrook,N. M.

A1 - Zwieniecki,M. A.

AU - Jensen,Kåre Hartvig

AU - Lee,J.

AU - Bohr,Tomas

AU - Bruus,Henrik

AU - Holbrook,N. M.

AU - Zwieniecki,M. A.

PB - The/Royal Society

PY - 2011

Y1 - 2011

N2 - Plants require effective vascular systems for the transport of water and dissolved molecules between distal regions. Their survival depends on the ability to transport sugars from the leaves where they are produced to sites of active growth; a flow driven, according to the Münch hypothesis, by osmotic gradients generated by differences in sugar concentration. The length scales over which sugars are produced (Lleaf) and over which they are transported (Lstem), as well as the radius r of the cylindrical phloem cells through which the transport takes place, vary among species over several orders of magnitude; a major unsettled question is whether the Münch transport mechanism is effective over this wide range of sizes. Optimization of translocation speed predicts a scaling relation between radius r and the characteristic lengths as r ∼ (Lleaf Lstem)1/3. Direct measurements using novel in vivo techniques and biomimicking microfluidic devices support this scaling relation and provide the first quantitative support for a unified mechanism of sugar translocation in plants spanning several orders of magnitude in size. The existence of a general scaling law for phloem dimensions provides a new framework for investigating the physical principles governing the morphological diversity of plants.

AB - Plants require effective vascular systems for the transport of water and dissolved molecules between distal regions. Their survival depends on the ability to transport sugars from the leaves where they are produced to sites of active growth; a flow driven, according to the Münch hypothesis, by osmotic gradients generated by differences in sugar concentration. The length scales over which sugars are produced (Lleaf) and over which they are transported (Lstem), as well as the radius r of the cylindrical phloem cells through which the transport takes place, vary among species over several orders of magnitude; a major unsettled question is whether the Münch transport mechanism is effective over this wide range of sizes. Optimization of translocation speed predicts a scaling relation between radius r and the characteristic lengths as r ∼ (Lleaf Lstem)1/3. Direct measurements using novel in vivo techniques and biomimicking microfluidic devices support this scaling relation and provide the first quantitative support for a unified mechanism of sugar translocation in plants spanning several orders of magnitude in size. The existence of a general scaling law for phloem dimensions provides a new framework for investigating the physical principles governing the morphological diversity of plants.

U2 - 10.1098/rsif.2010.0578

DO - 10.1098/rsif.2010.0578

JO - Journal of the Royal Society. Interface

JF - Journal of the Royal Society. Interface

SN - 1742-5689

IS - 61

VL - 8

SP - 1155

EP - 1165

ER -