The Effects of High Steady State Auxin Levels on Root Cell Elongation in Brachypodium

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F16%3A00461670" target="_blank" >RIV/61389030:_____/16:00461670 - isvavai.cz</a>

Alternative codes found

RIV/61989592:15310/16:33161741

Result on the web

<a href="http://dx.doi.org/10.1105/tpc.15.01057" target="_blank" >http://dx.doi.org/10.1105/tpc.15.01057</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1105/tpc.15.01057" target="_blank" >10.1105/tpc.15.01057</a>

Result language

angličtina

Original language name

The Effects of High Steady State Auxin Levels on Root Cell Elongation in Brachypodium

Original language description

The long-standing Acid Growth Theory of plant cell elongation posits that auxin promotes cell elongation by stimulating cell wall acidification and thus expansin action. To date, the paucity of pertinent genetic materials has precluded thorough analysis of the importance of this concept in roots. The recent isolation of mutants of the model grass species Brachypodium distachyon with dramatically enhanced root cell elongation due to increased cellular auxin levels has allowed us to address this question. We found that the primary transcriptomic effect associated with elevated steady state auxin concentration in elongating root cells is upregulation of cell wall remodeling factors, notably expansins, while plant hormone signaling pathways maintain remarkable homeostasis. These changes are specifically accompanied by reduced cell wall arabinogalactan complexity but not by increased proton excretion. On the contrary, we observed a tendency for decreased rather than increased proton extrusion from root elongation zones with higher cellular auxin levels. Moreover, similar to Brachypodium, root cell elongation is, in general, robustly buffered against external pH fluctuation in Arabidopsis thaliana. However, forced acidification through artificial proton pump activation inhibits root cell elongation. Thus, the interplay between auxin, proton pump activation, and expansin action may be more flexible in roots than in shoots.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EB - Genetics and molecular biology

OECD FORD branch

—

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Plant Cell

ISSN

1040-4651

e-ISSN

—

Volume of the periodical

28

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

16

Pages from-to

1009-1024

UT code for WoS article

000378080000007

EID of the result in the Scopus database

—