Conifers exhibit a characteristic inactivation of auxin to maintain tissue homeostasis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73604382" target="_blank" >RIV/61989592:15310/20:73604382 - isvavai.cz</a>

Result on the web

<a href="https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.16463" target="_blank" >https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.16463</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/nph.16463" target="_blank" >10.1111/nph.16463</a>

Result language

angličtina

Original language name

Conifers exhibit a characteristic inactivation of auxin to maintain tissue homeostasis

Original language description

Dynamic regulation of the concentration of the natural auxin (IAA) is essential to coordinate most of the physiological and developmental processes and responses to environmental changes. Oxidation of IAA is a major pathway to control auxin concentrations in angiosperms and, along with IAA conjugation, to respond to perturbation of IAA homeostasis. However, these regulatory mechanisms remain poorly investigated in conifers. To reduce this knowledge gap, we investigated the different contributions of the IAA inactivation pathways in conifers. MS-based quantification of IAA metabolites under steady-state conditions and after perturbation was investigated to evaluate IAA homeostasis in conifers. Putative Picea abies GH3 genes (PaGH3) were identified based on a comprehensive phylogenetic analysis including angiosperms and basal land plants. Auxin-inducible PaGH3 genes were identified by expression analysis and their IAA-conjugating activity was explored. Compared to Arabidopsis, oxidative and conjugative pathways differentially contribute to reduce IAA concentrations in conifers. We demonstrated that the oxidation pathway plays a marginal role in controlling IAA homeostasis in spruce. By contrast, an excess of IAA rapidly activates GH3-mediated irreversible conjugation pathways. Taken together, these data indicate that a diversification of IAA inactivation mechanisms evolved specifically in conifers.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10611 - Plant sciences, botany

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

NEW PHYTOLOGIST

ISSN

0028-646X

e-ISSN

—

Volume of the periodical

226

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

1753-1765

UT code for WoS article

000533328500021

EID of the result in the Scopus database

2-s2.0-85080875275