Mechanical properties and structure-function trade-offs in secondary xylem of young roots and stems

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F19%3A50016180" target="_blank" >RIV/62690094:18470/19:50016180 - isvavai.cz</a>

Result on the web

<a href="https://academic.oup.com/jxb/article-abstract/70/14/3679/5531920" target="_blank" >https://academic.oup.com/jxb/article-abstract/70/14/3679/5531920</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/jxb/erz286" target="_blank" >10.1093/jxb/erz286</a>

Result language

angličtina

Original language name

Mechanical properties and structure-function trade-offs in secondary xylem of young roots and stems

Original language description

Bending and torsional properties of young roots and stems were measured in nine woody angiosperms. The variation in mechanical parameters was correlated to wood anatomical traits and analysed with respect to the other two competing functions of xylem (namely storage and hydraulics). Compared with stems, roots exhibited five times greater flexibility in bending and two times greater flexibility in torsion. Lower values of structural bending and structural torsional moduli (Estr and Gstr, respectively) of roots compared with stems were associated with the presence of thicker bark and a greater size of xylem cells. Across species, Estr and Gstr were correlated with wood density, which was mainly driven by the wall thickness to lumen area ratio of fibres. Higher fractions of parenchyma did not translate directly into a lower wood density and reduced mechanical stiffness in spite of parenchyma cells having thinner, and in some cases less lignified, cell walls than fibres. The presence of wide, partially non-lignified rays contributed to low values of Estr and Gstr in Clematis vitalba. Overall, our results demonstrate that higher demands for mechanical stability in self-supporting stems put a major constraint on xylem structure, whereas root xylem can be designed with a greater emphasis on both storage and hydraulic functions.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10611 - Plant sciences, botany

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of experimental botany

ISSN

0022-0957

e-ISSN

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Volume of the periodical

70

Issue of the periodical within the volume

14

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

3679-3691

UT code for WoS article

000484471600017

EID of the result in the Scopus database

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